Burkert 8792 Operating Instructions Manual
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Burkert 8792 Operating Instructions Manual

Electropneumatic positioner and process controller
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Type 8792, 8793 REV.2
Electropneumatic positioner and process controller
Operating Instructions

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  • Page 1 Type 8792, 8793 REV.2 Electropneumatic positioner and process controller Operating Instructions...
  • Page 2 We reserve the right to make technical changes without notice. Technische Änderungen vorbehalten. Sous resérve de modification techniques. © Bürkert Werke GmbH & Co. KG, 2017 Operating Instructions 1804/00_EN-en_00810648 / Original DE...

  • Page 3: Table Of Contents

    General description ........................13 5.2 Properties ...........................13 5.3 Variants ............................16 STRUCTURE AND FUNCTION ......................17 6.1 Representation ...........................17 6.2 Function diagram ........................18 POSITIONER TYPE 8792 ........................19 7.1 Schematic representation of the position control ..............20 7.2 The positioner software ......................21 PROCESS CONTROLLER TYPE 8793 ....................23 8.1 Schematic representation of process control ................24 8.2 The process controller software ....................25 INTERFACES ............................27 TECHNICAL DATA ..........................28...
  • Page 4 Type 8792, 8793 REV.2 10.1 Conformity ..........................28 10.2 Standards ...........................28 10.3 Approvals ...........................28 10.4 Operating conditions .........................28 10.5 Type label ...........................29 10.6 Mechanical data .........................29 10.7 Electrical data ..........................30 10.8 Pneumatic data ..........................31 10.9 Safety end positions after failure of the electrical or pneumatic auxiliary power ....32 ASSEMBLY ............................33 11.1 Safety instructions ........................33 11.2 Attachment to a continuous valve with linear actuator according to NAMUR......33 11.3 Attachment to a continuous valve with rotary actuator ............38 11.4 Remote operation with external position sensor ..............40...
  • Page 5 Type 8792, 8793 REV.2 14.4 X.TUNE – Automatic adjustment of the position controller ............68 14.5 Activation of the process controller ..................70 BASIC SETTING OF THE PROCESS CONTROLLER ................71 15.1 P.CONTROL – Setting up and parameterization of the process controller ......71 15.2 SETUP – Setting up the process controller ................72 15.3 PID.PARAMETER – Parameterizing the process controller ............. 78 15.4 P.Q’LIN – Linearization of the process characteristic .............82 15.5 P.TUNE – Self-optimization of the process controller .............83 AUXILIARY FUNCTIONS ........................87 16.1 Activating and deactivating auxiliary functions ................88 16.2 Manual configuration of X.TUNE ....................143 ACCESS TO THE BÜS SERVICE INTERFACE ...................147...
  • Page 6 Type 8792, 8793 REV.2 20.6 X5 - M8 circular plug, 4-pole - Process actual value (for Type 8793) ..................174 20.7 Accepting and saving SIM card data (option) ................175 MAINTENANCE AND TROUBLESHOOTING ..................178 21.1 Safety instruction ........................178 21.2 Maintenance ..........................178 21.3 Error messages ........................178 21.4 Malfunctions ..........................182 ACCESSORIES ...........................183 22.1 Communication software ......................183 22.2 Download ..........................183 22.3 USB interface ...........................183 PACKAGING, TRANSPORT ........................184 STORAGE ............................184...

  • Page 7: The Operating Instructions

    • Failure to observe the warning may result in damage to the device or other equipment. Indicates important additional information, tips and recommendations. Refers to information in these operating instructions or in other documentation. ▶ Indicates instructions for risk prevention. → Indicates a procedure which you must carry out. Indicates a result. Definition of terms In these instructions, the term “device” always refers to the Type 8792, 8793 REV.2. english...

  • Page 8: Intended Use

    The device is designed to be mounted on pneumatic actuators of process valves for the control of media. ▶ In potentially explosive atmospheres, Type 8792 and 8793 may be used only in accordance with the specification on the separate Ex type label. For the use, observe the ATEX manual with safety instruc- tions for potentially explosive atmospheres.

  • Page 9: Basic Safety Instructions

    Type 8792, 8793 REV.2 Basic safety instructions BASIC SAFETY INSTRUCTIONS These safety instructions do not consider any contingencies or incidents which occur during assembly, operation and maintenance. The operator is responsible for observing the location-specific safety regulations, also with reference to the personnel.

  • Page 10: General Information

    If required, cut out the code and keep it separate from these operating instructions. Information on the Internet The operating instructions and data sheets for Types 8792 and 8793 can be found on the Internet at: www.buerkert.de english...

  • Page 11: Product Description

    Product description PRODUCT DESCRIPTION General description The positioner Type 8792 / process controller Type 8793 is a digital, electro-pneumatic position controller for pneumatically actuated continuous valves. The device incorporates the main function groups - Position sensor - Electro-pneumatic actuating system - Microprocessor electronics The position sensor measures the current positions of the continuous valve.
  • Page 12 In this variant, no spring is installed in the actuator. Two basic device variants are available for positioner Type 8792 / process controller Type 8793. They differ as to the mounting options and the position sensor.
  • Page 13 Type 8792, 8793 REV.2 Product description 5.2.2 Overview of the mounting options Attachment of NAMUR on rotary actuator Attachment of NAMUR with a mounting bracket on a linear actuator Remote mounting with mounting bracket Remote mounting with DIN rail Table 1:...

  • Page 14: Variants

    Type 8792, 8793 REV.2 Product description Variants 5.3.1 Type 8792, positioner The position of the actuator is controlled according to the position set-point value. The position set-point value is specified by an external standard signal (or via fieldbus). 5.3.2 Type 8793, process controller Type 8793 also features a PID controller which, apart from actual position control, can also be used to implement process control (e.g.

  • Page 15: Structure And Function

    Structure and function STRUCTURE AND FUNCTION The positioner Type 8792 and process controller Type 8793 consist of the micro-processor controlled elec- tronics, the position sensor and the actuating system. The device is designed using three-wire technology. Operation is controlled by four keys and a 128x64 dot matrix graphics display.

  • Page 16: Function Diagram

    6.2.1 Diagram illustrating single-acting actuator The black lines in “Figure 2” describe the function of the position controller circuit in Type 8792. The gray part of the diagram indicates the additional function of the superimposed process control circuit in Type 8793.

  • Page 17: Positioner Type 8792

    0. Z1 represents a disturbance variable. Valve opening Actuating Position Positioner Continuous system set-point valve Solenoid value valves Position sensor Position control circuit Figure 3: Position control circuit in Type 8792 english...

  • Page 18: Schematic Representation Of The Position Control

    Type 8792, 8793 REV.2 Positioner Type 8792 Schematic representation of the position control Figure 4: Schematic representation of position control english...

  • Page 19: The Positioner Software

    Type 8792, 8793 REV.2 Positioner Type 8792 The positioner software Configurable auxiliary functions Effect Correction line to adjust the operating Selection of the transfer characteristic between input characteristic signal and stroke (correction characteristic). CHARACT Sealing function Valve closes tight outside the control range. Specifi-...
  • Page 20 Type 8792, 8793 REV.2 Positioner Type 8792 Configurable auxiliary functions Effect Serial interface Configuration of serial interface. SER.I/O Setting display Adjustment of the display of the process level. EXTRAS SERVICE For internal use only. POS.SENSOR Setting interface remote position sensor (available for Type 8793 Remote only).

  • Page 21: Process Controller Type 8793

    Type 8792, 8793 REV.2 Process controller Type 8793 PROCESS CONTROLLER TYPE 8793 In the case of process controller Type 8793 the position control mentioned in chapter “7” becomes the sub- ordinate auxiliary control circuit; this results in a cascade control. The process controller in the main control circuit of Type 8793 has a PID function.

  • Page 22: Schematic Representation Of Process Control

    Type 8792, 8793 REV.2 Process controller Type 8793 Schematic representation of process control Figure 6: Schematic representation of process control english...

  • Page 23: The Process Controller Software

    Type 8792, 8793 REV.2 Process controller Type 8793 The process controller software Configurable auxiliary functions Effect Correction line to adjust the operating Selection of the transfer characteristic between input characteristic signal and stroke (correction characteristic). CHARACT Sealing function Valve closes tight outside the control range. Specifi-...
  • Page 24 Type 8792, 8793 REV.2 Process controller Type 8793 Configurable auxiliary functions Effect Setting display Adjustment of the display of the process level. EXTRAS SERVICE For internal use only. POS.SENSOR Setting interface remote position sensor (available for Type 8793 Remote only). See chapter “5.3.3 Type 8793, remote variant”...

  • Page 25: Interfaces

    Type 8792, 8793 REV.2 Interfaces INTERFACES Inputs for position or 2 binary outputs process set-point value 4...20 mA 24 V PNP Positioner / process 0...20 mA controller 0...10 V 0...5 V Initiator 1 / initiator 2 Input for process 24 V PNP NO actual value* 4...20 mA...

  • Page 26: Technical Data

    Technical data TECHNICAL DATA 10.1 Conformity Type 8792, 8793 complies with the EC directives according to the EC Declaration of Conformity (if applicable). 10.2 Standards The applied standards, which are used to demonstrate compliance with the EC Directives, are listed in the EC Prototype Examination Certificate and/or the EC Declaration of Conformity (if applicable).

  • Page 27: Type Label

    Type 8792, 8793 REV.2 Technical data 10.5 Type label Nominal power Operating voltage Device variant Type (NAMUR/Remote, 24 V DC, PROFINET, hardware version) 8792 24V DC 5W 8792 24V DC 5W Hardware revision 8792 24V DC 5W NAMUR Profibus DP Remote PROFINET REV.2...

  • Page 28: Electrical Data

    Type 8792, 8793 REV.2 Technical data 10.7 Electrical data Connections 2 cable bushings (M20 x 1.5) with screw-type terminals 0.14...1.5 mm or circular plug-in connector Operating voltage 24 V DC ±10% max. residual ripple 10% Power consumption < 5 W Input data for actual value signal 4...20 mA:...

  • Page 29: Pneumatic Data

    Type 8792, 8793 REV.2 Technical data 10.8 Pneumatic data Control medium Air, neutral gases Quality classes in accordance with ISO 8573-1 Dust content Class 7, max. particle size 40 µm, max. particle density 10 mg/m³ Water content Class 3, max. pressure dew point -20 °C or min. 10 degrees below...

  • Page 30: Safety End Positions After Failure Of The Electrical Or Pneumatic Auxiliary Power

    Type 8792, 8793 REV.2 Technical data 10.9 Safety end positions after failure of the electrical or pneumatic auxiliary power The safety end position depends on the pneumatic connection of the actuator to the working connections A1 or A2. Safety end positions after failure of the Type of actuator...

  • Page 31: Assembly

    Type 8792, 8793 REV.2 Assembly ASSEMBLY The dimensions of the positioner Type 8792/8793 and the different device variants can be found on the data sheet. 11.1 Safety instructions WARNING Risk of injury due to incorrect assembly. ▶ Assembly may only be carried out by authorized specialist personnel and using the appropriate tools. Risk of injury due to unintentional switching on of the plant and uncontrolled start-up. ▶ Secure the device against accidental activation. ▶ Following assembly, ensure a controlled restart.
  • Page 32 Type 8792, 8793 REV.2 Assembly Seq. No. Quantity Designation Spring washer DIN 137 A6 Locking washer DIN 6799 - 3.2 Circlip DIN 127 A6 Hexagon bolt DIN 933 M6 x 25 Hexagon nut DIN 934 M6 Square nut DIN 557 M6 Hexagon nut DIN 934 M8 Guide washer 6.2 x 9.9 x 15 x 3.5...
  • Page 33 Type 8792, 8793 REV.2 Assembly → Select short or long lever according to the stroke of the actuator “Table 10: Attachment kit on linear actuator”. → Assemble lever (unless pre-assembled) (see “Figure 10: Assembling the lever”. Key: Designation Driver pin...
  • Page 34 The swing movement of the lever must be within the position sensor rotation range of 180°. Figure 11: Swing range of the lever → Mount lever on the shaft of Type 8792/8793 and tighten. 11.2.3 Attaching the mounting bracket ① ⑨ ⑩...
  • Page 35 Type 8792, 8793 REV.2 Assembly Attaching the Type 8792/8793 with mounting bracket for actuators with cast frame: ⑧, ⑪ → Attach mounting bracket to the cast frame with one or more hexagon bolts washers and circlips ⑩ (see “Figure 13”). Key: Designation Mounting bracket Hexagon bolt Circlip Washer Figure 13: Attach positioner with mounting bracket; for actuators with cast frame Attaching the Type 8792/8793 with mounting bracket for actuators with columnar yoke: ⑦,...

  • Page 36: Attachment To A Continuous Valve With Rotary Actuator

    - in parallel to the actuator or - rotated by 90° to the actuator. → Determine the home position and the direction of rotation of the actuator. → Fit adaptor to the shaft of Type 8792/8793 and attach with 2 setscrews. english...
  • Page 37 Set up the multi-part assembly bridge* to suit the actuator. ③ ④ → Attach the assembly bridge by 4 hexagon bolt and circlips to Type 8792/8793 (see “Figure 16”). * The assembly bridge consists ④ of four parts, which can be adjusted to the actuator by different arrangements.

  • Page 38: Remote Operation With External Position Sensor

    Type 8792, 8793 REV.2 Assembly → Place Type 8792/8793 with assembly bridge on the rotary actuator and attach (see “Figure 17”). Figure 17: Swivel actuator attachment If the X.TUNE ERROR 5 message is indicated after the X.TUNE function starts, the shaft of Type 8792/8793 is not correctly aligned with the shaft of the actuator (see “Error message for P.Q.‘LIN; process controller Type 8793” on page 178). • Check alignment (as described previously in this chapter). • Then repeat the X.TUNE function.
  • Page 39 ▶ Following assembly, ensure a controlled restart. → Connect the 3 or 4 wires of the sensor cable to the designated screw-type terminals of Type 8792/8793. Connection of screw-type terminals: See chapter “12.2.2.4. Terminal assignment for external position sensor (for remote variant only)” on page 50 Connection of M8 circular plug (only for Ethernet (Ethernet/IP, PROFINET I/O, Modbus TCP) and büS):...
  • Page 40 Type 8792, 8793 REV.2 Assembly → Connect positioner pneumatically to the actuator. → Switch on the operating voltage of Type 8792/8793: → Run the X.TUNE function. 11.4.3 Connection and start-up of an external 4...20 mA position sensor (only for Type 8793 remote variant) Process controller Type 8793 can only be used as a positioner (position controller) when an external position sensor 4...20 mA is connected as the process actual value input is used as the input for...

  • Page 41: Pneumatic Connection

    Type 8792, 8793 REV.2 Assembly → To achieve the best-possible control accuracy, set the external position sensor such that the past to be detected corresponds to the signal range 4...20 mA (only if the external position sensor includes this function). →...
  • Page 42 Type 8792, 8793 REV.2 Assembly Procedure: → Apply supply pressure (1.4...7 bar) to the pressure supply connection P. For single-acting actuators (control function A and B): → Connect one working connection (A1 or A2, depending on required safety end position) to the chamber of the single-acting actuator. See chapter “10.9. Safety end positions after failure of the electrical or pneumatic auxiliary power”.

  • Page 43: Electrical Installation

    Type 8792, 8793 REV.2 Electrical installation ELECTRICAL INSTALLATION There are 2 connection variants for Type 8792, 8793: • Multipole with circular plug-in connector • Cable gland with connection terminals Signal values Operating voltage: 24 V DC Set-point value (process/position controller): 0...20 mA; 4...20 mA 0...5 V;...
  • Page 44 X4 - M8 socket, X1 - M12 circular plug, 4-pole 8-pole Figure 20: Type 8792; designation of the circular plug-in connectors and contacts 12.1.2 Connection of positioner Type 8792 → Connect pins according to the variant (options) of the positioner.
  • Page 45 Type 8792, 8793 REV.2 Electrical installation 12.1.3.1. X4 - M8 socket, 4-pole (for the binary output option only) output signals to the control center (e.g. PLC) Assignment On the device side External circuit / signal level Binary output 1 0...24 V Binary output 2 0...24 V GND (identical to GND operating...
  • Page 46 Type 8792, 8793 REV.2 Electrical installation Location of the switch: Location of the switch Symbols for switch position Switch on right Switch on left Figure 22: Location of the switch; symbols for switch position 12.1.5 Connection of the process controller Type 8793 →...
  • Page 47 70). ** The indicated wire colors refer to the connection cable, ID no. 92903474, available as an accessory. *** Position of the switch, see “Figure 20: Type 8792; designation of the circular plug-in connectors and contacts” Table 15: X5 - M8 circular plug, 4-pole, input signals process actual value (for Type 8793 only) For reasons of wire compensation connect the Pt 100 sensor via 3 wires.

  • Page 48: Electrical Installation With Cable Gland

    The screw-type terminals are now accessible. → Connect Type 8792/8793. The procedure is described in the following chapters for Type 8792: Chapter “12.2.2 Terminal assignment for cable gland - Type 8792” for Type 8793: Chapter “12.2.3 Terminal assignment for cable gland - Type 8793”. english...
  • Page 49 Type 8792, 8793 REV.2 Electrical installation 12.2.2 Terminal assignment for cable gland - Type 8792 12.2.2.1. Input signals from the control center (e.g. PLC) Terminal Assignment On the device side External circuit / signal level (0/4...20 mA or 0...5 / 10 V) 11 + Set-point value + fully galvanically isolated 11 + ...
  • Page 50 Type 8792, 8793 REV.2 Electrical installation 12.2.2.4. Terminal assignment for external position sensor (for remote variant only) Connection of the digital, non-contacting position sensor Type 8798: Wire color On the device Terminal Assignment External circuit / signal level Cable Cable side type 1 type 2 brown brown Supply sensor +...
  • Page 51 Type 8792, 8793 REV.2 Electrical installation 12.2.3.1. Terminal assignments of the process actual value input Input type* Terminal Assignment On the device side External circuit 4...20 mA +24 V input transmitter - internally Output from transmitter Transmitter supplied Bridge after GND (GND terminal from operating voltage) Not assigned GND from operating voltage 4...20 mA...

  • Page 52: Operation

    ▶ Observe the safety instructions and intended use. ▶ Only adequately trained personnel may operate the equipment/the device. There is the process level and the setting level for the operation and setting of Type 8792/8793. Process level: The running process is displayed and operated on the process level.
  • Page 53 Type 8792, 8793 REV.2 Operation Display elements of the setting level: Menu designation M A I N INPUT BUS.COMM Submenu X.TUNE ADD.FUNCTION EXIT ENTER Designation for the function of the keys Figure 25: Display elements of the setting level Display elements of the process level: Symbol for position control Symbol for process control...

  • Page 54: Function Of The Keys

    Type 8792, 8793 REV.2 Operation 13.1.1 Description of the symbols which are displayed on the process level The symbols which are displayed depend on • type, • operation as position or process controller, • AUTOMATIC or MANU operating state and •...
  • Page 55 Type 8792, 8793 REV.2 Operation Key function on the process level: Key function Description of the function Operating state Arrow key Manual opening of the actuator. MANUAL Change the displayed value AUTOMATIC (e.g. POS-CMD-TEMP-...). Arrow key Manual closing of the actuator. MANUAL Change the displayed value AUTOMATIC (e.g. POS-CMD-TEMP-...). left MENU Change to the setting level.
  • Page 56 Type 8792, 8793 REV.2 Operation 13.2.1 Entering and changing numerical values Changing numerical values with fixed decimal places: Description of the function Example function Change to the next decimal place (from right to Arrow key left). After reaching the last decimal place, the display switches back to the first decimal place.

  • Page 57: Adjusting The Display

    Type 8792, 8793 REV.2 Operation 13.3 Adjusting the display The display can be individually adjusted for the operation and monitoring of the process. • To do this, menu options can be activated for displaying the process level. POS and CMD are activated in the as-delivered state.
  • Page 58 Type 8792, 8793 REV.2 Operation Graphical display of POS and CMD with time axis MENU CMD / POS (t) HOLD Time, weekday and date CLOCK 12:00 Thu. 01 . 09 . 11 MENU INPUT INPUT X.TUNE Input signal for set-point position INPUT (0...5/10 V or 0/4...20 mA)

  • Page 59: Date And Time

    Type 8792, 8793 REV.2 Operation 13.4 Date and time Date and time are set on the process level in the CLOCK menu. To ensure that the menu for CLOCK can be selected on the process level, the following functions must be activated in 2 stages: 1.

  • Page 60: Operating States

    You have set date and time. 13.5 Operating states Type 8792/8793 has 2 operating states: AUTOMATIC and MANUAL. When the operating voltage is switched on, the device is in the AUTOMATIC operating state. AUTOMATIC In the AUTOMATIC operating state normal controlled operation is implemented.

  • Page 61: Activating And Deactivating Auxiliary Functions

    Type 8792, 8793 REV.2 Operation MANUAL In the MANUAL operating state the valve can be manually opened or closed via the arrow keys (key function (The symbol for AUTOMATIC is hidden. No bar running along the upper edge of the display).
  • Page 62 Type 8792, 8793 REV.2 Operation Set the parameters as follows: → Select auxiliary function. In the main menu (MAIN) select the auxiliary function. → Select ENTER. Opening the submenu to input the parameters. The setting of the submenu is described in the respective chapter of the auxiliary function.

  • Page 63: Manually Opening And Closing The Valve

    Type 8792, 8793 REV.2 Operation 13.7 Manually opening and closing the valve In the MANUAL operating state, the valve can be opened and closed manually using the arrow keys The MANUAL operating state (key function ) is for the following process value displays: MANU • POS , actual position of the valve actuator.

  • Page 64: Start-Up

    Before start-up, carry out fluid and electrical installation of Type 8792/8793 and of the valve. For description see chapter “11” and “12”. When the operating voltage is applied, Type 8792/8793 is operating and is in the AUTOMATIC operating state. The display shows the process level with the values for POS and CMD. The following basic settings must be made for starting up the device:...

  • Page 65: Basic Setting Of The Device

    Type 8792, 8793 REV.2 Start-up 14.2 Basic setting of the device The following settings must be made for the basic setting of Type 8792/8793: INPUT Selection of the input signal (see chapter “14.3”). Automatic self-parameterization of the position controller (see chapter “14.5”) X.TUNE 14.3 INPUT - Setting the input signal This setting is used to select the input signal for the set-point value.

  • Page 66: X.tune - Automatic Adjustment Of The Position Controller

    The following functions are actuated automatically: • Adjustment of the sensor signal to the (physical) stroke of the actuator used. • Determination of parameters of the PWM signals to control the solenoid valves integrated in Type 8792, 8793. • Adjustment of the controller parameters for the position controller. Optimization occurs according to the criteria of the shortest possible transient time without overshoots.
  • Page 67 Type 8792, 8793 REV.2 Start-up Automatically determining dead band DBND by running X.TUNE: When X.TUNE is running, the dead band can be automatically determined depending on the friction behavior of the actuating drive. Before running X.TUNE, the X.CONTROL auxiliary function must be activated by incorporating it into the main menu (MAIN).

  • Page 68: Activation Of The Process Controller

    Type 8792, 8793 REV.2 Start-up 14.4.2.1. X.TUNE.CONFIG – Manual configuration of X.TUNE This function is needed for special requirements only. For standard applications the X.TUNE function (automatic adjustment of the positioner), as described above, is run using the factory default settings. The description of the X.TUNE.CONFIG function can be found in Chapter “26.3. Manual configuration of X.TUNE”. 14.5 Activation of the process controller The process controller is activated by selecting the P.CONTROL auxiliary function in the ADD.FUNCTION menu.

  • Page 69: Basic Setting Of The Process Controller

    Type 8792, 8793 REV.2 Type 8792, 8793 REV.2 Basic setting of the process controller BASIC SETTING OF THE PROCESS CONTROLLER 15.1 P.CONTROL – Setting up and parameterization of the process controller Set up the process controller as follows: → Press MENU for 3 s. Switching from process level setting level.

  • Page 70: Setup - Setting Up The Process Controller

    Type 8792, 8793 REV.2 Basic setting of the process controller 15.2 SETUP – Setting up the process controller These functions specify the type of control. The procedure is described in the following chapters “15.2.1” to “15.2.5”. 15.2.1 PV-INPUT – Specifying signal type for the process actual value One of the following signal types can be selected for the process actual value: •...
  • Page 71 Type 8792, 8793 REV.2 Basic setting of the process controller 15.2.2.1. Effects and dependencies of the settings of PV-INPUT on PV-SCALE The settings in the PV-SCALE menu have different effects, depending on the signal type selected in PV-INPUT. Even the selection options for the units of the process actual value (in PVmin) depend on the signal type selected in PV-INPUT.
  • Page 72 Type 8792, 8793 REV.2 Basic setting of the process controller For internal set-point value default (SP-INPUT → internal), the process set-point value is input directly on the process level. Example of a sensor calibration for frequency signal type: Scaling: Pulses...
  • Page 73 Type 8792, 8793 REV.2 Basic setting of the process controller Set the K factor as follows: → Select K factor. → Select ENTER. The submenu options for scaling of the process actual value are displayed. Either: → Select VALUE. Manual input of the K factor. → Select INPUT. The input screen is opened. The decimal point has a dark background.
  • Page 74 Type 8792, 8793 REV.2 Basic setting of the process controller 15.2.3 SP-INPUT – Type of set-point value default (internal or external) The SP-INPUT menu specifies how the default of the process set-point value is to be implemented. • Internal: Input of the set-point value on the process level •...
  • Page 75 Type 8792, 8793 REV.2 Basic setting of the process controller → Increase value and <- select decimal place. Set scaling value (upper process set-point value). The value is assigned to the largest current or voltage value of the standard signal.

  • Page 76: Pid.parameter - Parameterizing The Process Controller

    15.3.1 DBND – Insensitivity range (dead band) This function causes the process controller to respond from a specific control difference only. This protects both the solenoid valves in Type 8792, 8793 and the pneumatic actuator. Factory setting: 1.0% with reference to the range of the scaled process actual value (setting in the menu PV-SCALE →...
  • Page 77 Type 8792, 8793 REV.2 Basic setting of the process controller Insensitivity range for process control Xd2‘ Process set- point value Control (SP) difference to the controller Xd2‘ Process Dead band actual value (PV) Figure 29: DBND graph; insensitivity range for process control 15.3.2...
  • Page 78 Type 8792, 8793 REV.2 Basic setting of the process controller 15.3.3 TN – Reset time of the process controller The reset time specifies the I portion of the PID controller, can be set with the P.TUNE function. Factory setting: 999.9 s Enter the parameters as follows: →...
  • Page 79 Type 8792, 8793 REV.2 Basic setting of the process controller If the submenu is left by pressing the left selection key , the value remains unchanged. 15.3.5 X0 – Operating point of the process controller The operating point corresponds to the operating point of the proportional portion when control difference = 0. Factory setting: 0.0% Enter the parameters as follows: →...

  • Page 80: P.q'lin - Linearization Of The Process Characteristic

    Type 8792, 8793 REV.2 Basic setting of the process controller → Select EXIT. Return to the main menu (MAIN). → Select EXIT. Return to P.CONTROL. Switching from setting level process level. You have set the parameter. If the submenu is left by pressing the left selection key , the value remains unchanged. Setting the filter effect in 10 stages Setting...

  • Page 81: P.tune - Self-Optimization Of The Process Controller

    Type 8792, 8793 REV.2 Basic setting of the process controller Q.LIN #10 CMD=100% Display of the node which is currently running (progress is indicated by a progress bar along the upper edge of the display). Q.LIN ready Automatic linearization was successfully completed.
  • Page 82 Type 8792, 8793 REV.2 Basic setting of the process controller 15.5.1 The operating mode of P.TUNE The P.TUNE function automatically identifies the process. To do this, the process is activated with a defined disturbance variable. Typical process characteristics are derived from the response signal and the structure and parameters of the process controller are determined on the basis of the process characteristics.
  • Page 83 Type 8792, 8793 REV.2 Basic setting of the process controller Enter the process set-point value as follows: ( Setting on the process level) → Select SP. The process set-point value is indicated on the display. → Select INPUT. The input screen for inputting the process set-point value is displayed.
  • Page 84 Type 8792, 8793 REV.2 Basic setting of the process controller You have set the P.TUNE function. To stop P.TUNE, press the left or right selection key STOP The changed data is saved in the memory (EEPROM) only when there is a switch to the process level, by leaving the main menu (MAIN) using the left selection key EXIT Possible error messages when running P.TUNE: Display Cause of error Remedy TUNE Manual termination of self-optimization err/break by pressing the key. EXIT P.TUNE No supply pressure connected.

  • Page 85: Auxiliary Functions

    Type 8792, 8793 REV.2 Auxiliary functions AUXILIARY FUNCTIONS The device has auxiliary functions for demanding control tasks. This chapter describes how the auxiliary functions are activated, set and configured. Overview and description of the auxiliary functions: ADD.FUNCTION Description CHARACT Selection of the transfer characteristic between input signal and stroke...

  • Page 86: Activating And Deactivating Auxiliary Functions

    Type 8792, 8793 REV.2 Auxiliary functions 16.1 Activating and deactivating auxiliary functions The required auxiliary functions must be activated by the user initially by incorporation into the main menu (MAIN). The parameters for the auxiliary functions can then be set.
  • Page 87 Type 8792, 8793 REV.2 Auxiliary functions 16.1.2 Removing auxiliary functions from the main menu If a function is removed from the main menu, the settings implemented previously under this function become invalid again. Remove auxiliary functions from ADD.FUNCTION as follows: → Press MENU for 3 s. Switching from process level setting level. → Select ADD.FUNCTION. → Select ENTER. The possible auxiliary functions are displayed. →...
  • Page 88 For this reason it is occasionally necessary to correct the course of the operating characteristic in a suitable way. For this purpose Type 8792/8793 features a transfer element which implements different characteristics. These are used to correct the operating characteristic.
  • Page 89 Type 8792, 8793 REV.2 Auxiliary functions Enter the freely programmable characteristic as follows: → Press MENU for 3 s. Switching from process level setting level. → Select CHARACT. To do this, the auxiliary function must be incorporated into the main menu. → Select ENTER. Menu options of CHARACT are displayed.
  • Page 90 Type 8792, 8793 REV.2 Auxiliary functions Example of a programmed characteristic Valve stroke [%] (POS) Standard signal [%] (CMD) 90 100 4...20 mA 0...20 mA 0...10 V 0...5 V Figure 32: Example of a programmed characteristic In the section “Tables for customer-specific settings” in chapter “42.1. Settings of the freely pro- grammed characteristic” there is a table in which you can enter your settings for the freely pro- grammable characteristic. english...
  • Page 91 Type 8792, 8793 REV.2 Auxiliary functions 16.1.4 CUTOFF – Sealing function This function causes the valve to be sealed outside the control range. To do this, the limits for the set-point position (CMD) are entered as a percentage from which the actuator is fully deaerated or aerated.
  • Page 92 Type 8792, 8793 REV.2 Auxiliary functions → Select EXIT. Switching from setting level process level. The changed data is saved in the memory (EEPROM). You have entered the CUTOFF sealing function. The changed data is saved in the memory (EEPROM) only when there is a switch to the process level, by leaving the main menu (MAIN) using the left selection key EXIT Valve stroke [%] Adjustable from 75...100%...
  • Page 93 Type 8792, 8793 REV.2 Auxiliary functions 16.1.5 DIR.CMD – Effective direction (Direction) of the positioner set- point value You can use this auxiliary function to set the effective direction between the input signal(INPUT) and the set- point position (CMD) of the actuator.
  • Page 94 Type 8792, 8793 REV.2 Auxiliary functions 16.1.6 DIR.ACT – Effective direction of the actuating drive Use this auxiliary function to set the effective direction between the aeration state of the actuator and the actual position (POS). Factory setting: Rise Enter the effective direction of the actuating drive as follows: (Setting on the process level) →...
  • Page 95 (position controller). P.CONTROL = not activated. Use this auxiliary function to limit the position set-point value range of Type 8792/8793 by specifying a minimum and a maximum value. As a result, it is possible to split a used standard signal range (4...20 mA, 0...20 mA, 0...10 V or 0...5 V) over several devices (without or with overlapping).
  • Page 96 Type 8792, 8793 REV.2 Auxiliary functions Splitting a standard signal range into two set-point value ranges Valve stroke [%] (POS) Set-point value [mA] (INP) Set-point value range Set-point value range positioner 1 positioner 2 Figure 36: SPLTRNG graph 16.1.8 X.LIMIT – Limit of the mechanical stroke range This auxiliary function limits the (physical) stroke to specified percentage values (minimum and maximum). In doing so, the stroke range of the limited stroke is set equal to 100%.
  • Page 97 Type 8792, 8793 REV.2 Auxiliary functions The changed data is saved in the memory (EEPROM) only when there is a switch to the process level, by leaving the main menu (MAIN) using the left selection key EXIT Limited stroke (%) Physical stroke (%) (POS) (POS) Unlimited stroke Limited stroke Set-point value [mA] (INPUT) Figure 37: X.LIMIT graph 16.1.9 X.TIME – Limit of the control speed Use this auxiliary function to specify the opening and closing times for the entire stroke and limit the control speeds.
  • Page 98 Type 8792, 8793 REV.2 Auxiliary functions → Enter value: Closing time for total stroke (in seconds) Adjustment range: 1...60 seconds Increase value - Reduce value → Select OK *. Acknowledge input and return to the display of X.TIME. You have entered the limit of the control speed.
  • Page 99 (see auxiliary function “26.2.6. X.LIMIT – Limit of the mechanical stroke range” ). This function causes the controller to respond only from a specific control difference; as a result the solenoid valves in Type 8792/8793 and the pneumatic actuator are protected. Xd1‘ Control...
  • Page 100 Parameterization of the process controller is described in chapter “25.1. P.CONTROL – Setting up and parameterization of the process controller”. 16.1.12 SECURITY – Code protection for the settings Use the SECURITY function to prevent Type 8792/8793 or individual functions from being accessed unintentionally. Factory setting: Access Code: 0000 If the code protection is activated, the code (set Access Code or master code) must be input whenever operator action is disabled.
  • Page 101 Type 8792, 8793 REV.2 Auxiliary functions 16.1.13 SAFEPOS – Inputting the safety position This function specifies the actuator safety position which is started at defined signals. The set safety position is only started • if a corresponding signal is applied to the binary input (configuration see chapter “26.2.13. BINARY.IN – Activation of the binary input”) or •...
  • Page 102 Type 8792, 8793 REV.2 Auxiliary functions 16.1.14 SIG.ERROR – Configuration of signal level fault detection The SIG.ERROR function is used to detect a fault on the input signal. If signal fault detection is activated, the respective fault is indicated on the display.
  • Page 103 Type 8792, 8793 REV.2 Auxiliary functions Only for type 8793 (process control): → Select SIG.ERROR. (To do this, the auxiliary function must be incorporated into the main menu). → Select ENTER. The input screen for setting the signal fault detection for input signal is displayed.
  • Page 104 Type 8792, 8793 REV.2 Auxiliary functions 16.1.15 BINARY.IN – Activation of the binary input The binary input is configured in this menu. The following functions can be assigned to it: Approaching SafePos SafePos Switching over the operating state (MANUAL / AUTOMATIC) Manu/Auto Starting the X.TUNE function...
  • Page 105 • one analog output and two binary outputs • two binary outputs According to the variant of Type 8792/8793, only the possible adjustable outputs (ANALOG, ANALOG + BIN 1 + BIN 2 or BIN 1 + BIN 2) are indicated in the OUTPUT menu option.
  • Page 106 16.1.16.1. OUT ANALOG - Configuration of the analog output Type 8792: The feedback of the current position (POS) or of the set-point value (CMD) can be transmitted to the control center via the analog output. Type 8793: The feedback of the current position (POS) or of the set-point value (CMD), of the process actual value (PV) or of the process set-point value (SP) can be transmitted to the control center via the analog output.
  • Page 107 Type 8792, 8793 REV.2 Auxiliary functions 16.1.16.2. OUT BIN1 / OUT BIN2 - Configuring the binary outputs The following description is valid for both binary outputs OUT BIN 1 and OUT BIN 2, as the operation in the menu is identical.
  • Page 108 Type 8792, 8793 REV.2 Auxiliary functions 16.1.16.3. Setting of the submenu options of OUT BIN 1 and OUT BIN 2 Open the submenus as follows: →  Press MENU for 3 s. Switching from process level setting level. → Select OUTPUT (to do this, the auxiliary function must be incorporated into the main menu).
  • Page 109 Type 8792, 8793 REV.2 Auxiliary functions • Safepos - Outputting the message: Actuator in safety position • ERR.SP/CMD - Outputting the message: Sensor break for process set-point value/set-point position Only available if the function in the SIG.ERR menu has been activated (SIG.ERR → SP/CMD input → Error on). See chapter “26.2.12. SIG.ERROR – Configuration of signal level fault detection”.
  • Page 110 Type 8792, 8793 REV.2 Auxiliary functions • OUT.type - Setting the switching status In addition to selecting the output, the switching status required for the binary output must be entered. See following “Table 64”. Enter the OUT.type as follows: → Select OUT.type. → Select SELEC. The switching statuses normally open and normally closed are displayed.
  • Page 111 Type 8792, 8793 REV.2 Auxiliary functions 16.1.17 CAL.USER – Calibration of actual value and set-point value The following values can be manually calibrated with this function: • Position actual value calibr. POS (0 - 100%) calibr. INP • Set-point position (4 - 20 mA, 0 - 20 mA, 0 - 5 V, 0 - 10 V)
  • Page 112 Type 8792, 8793 REV.2 Auxiliary functions → Select OK. Transfer and simultaneous return to the calibr.POS menu. → Select POS. pMax. → Select INPUT. The input screen for the upper value (POS.upper) is opened. → Select OPN open more CLS close more. Approach maximum position of the valve.
  • Page 113 Type 8792, 8793 REV.2 Auxiliary functions → Select OK. Transfer and simultaneous return to the calibr.SP menu. → Select SP 20 mA (5V/10V). The maximum value for the input signal is displayed. → Apply the maximum value to the input. →...
  • Page 114 Type 8792, 8793 REV.2 Auxiliary functions 16.1.17.3. Resetting the settings under CAL.USER to the factory settings Reset the settings as follows: → Press MENU for 3 s. Switching from process level setting level. → Select CAL.USER. (To do this, the auxiliary function must be incorporated into the main menu).
  • Page 115 Type 8792, 8793 REV.2 Auxiliary functions 16.1.19 SERVICE.BUES – Setting the service interface Set the service interface as follows: → Press MENU for 3 s. Switching from process level setting level. → Select SERVICE.BUES. → Select ENTER. The possible BUES are displayed. Select baud rate: → Select baud rate.
  • Page 116 Type 8792, 8793 REV.2 Auxiliary functions Activate the menu displays for displaying the process level as follows: → Press MENU for 3 s. Switching from process level setting level. → Select ADD.FUNCTION. → Select ENTER. The possible auxiliary functions are displayed. → Select EXTRAS. → Select ENTER. Activate the EXTRAS auxiliary function by checking the box and transfer into the main menu.
  • Page 117 Type 8792, 8793 REV.2 Auxiliary functions DISP.MODE - S elect type of display (black font on light background or white font on dark background): Select the type of display as follows: → Press MENU for 3 s. Switching from process level setting level. → Select ADD.FUNCTION. → Select ENTER. The possible auxiliary functions are displayed. → Select EXTRAS. → Select ENTER. Activate the EXTRAS auxiliary function by checking the box and transfer into the main menu.
  • Page 118 The position signal of the external position sensor is digitally transmitted Digital interface (menu option POS.SENSOR → DIGITAL): Type 8792/8793 is connected to the path sensor Type 8798 via a digital interface (see chapter “Terminal assignment for external position sensor (for remote variant only)” on page 137).
  • Page 119 Type 8792, 8793 REV.2 Auxiliary functions Tangent correction When attaching the positioner according to NAMUR to a linear actuator, the linear position of the actuator is converted into a rotated position measured by the positioner. This results in a non-linear correlation (POS ∼ tan(α)) that is corrected by the tangent correction.
  • Page 120 Type 8792, 8793 REV.2 Auxiliary functions 16.1.22 SERVICE This function is of no importance to the operator of Type 8792/8793. It is for internal use only. SIMULATION – Menu for simulation of set-point value, process 16.1.23 and process valve This function can be used to simulate set-point value, process and process valve independently of each other.
  • Page 121 Type 8792, 8793 REV.2 Auxiliary functions Deactivation of the simulation: In the SIGNAL.form submenu Selection Extern = set-point value simulation inactive (corresponds to the factory setting in the as-delivered state) Activate and parameterize the set-point value simulation as follows: → Press MENU for 3 s. Switching from process level setting level. → Select SIMULATION. (To do this, the auxiliary function must be incorporated into the main menu).
  • Page 122 Type 8792, 8793 REV.2 Auxiliary functions For simulation of process and process valve: → Select CONTROL.sim. For description see chapter “16.1.23.2. CONTROL.sim – Simulation of the process and process valve”. Leaving the SIMULATION menu: → Select EXIT. Return to the main menu (MAIN). → Select EXIT. Switching from setting level process level.
  • Page 123 Type 8792, 8793 REV.2 Auxiliary functions Simulate the processes and process valve as follows: → Press MENU for 3 s. Switching from process level setting level. → Select SIMULATION. (To do this, the auxiliary function must be incorporated into the main menu). → Select ENTER. The submenu for setting the simulation is displayed.
  • Page 124 Type 8792, 8793 REV.2 Auxiliary functions DIAGNOSE – Menu for monitoring valves (option) 16.1.24 The optional function DIAGNOSE can be used to monitor the state of the valve. If there are deviations from the set-point state, messages are output according to NE 107.
  • Page 125 Type 8792, 8793 REV.2 Auxiliary functions 16.1.24.3. Activation of diagnostic functions In the ADD.DIAGNOSE menu several diagnostic functions are activated and incorporated into the DIAGNOSE main menu. Activatable diagnostic functions: Graphical display of the dwell time density and movement range. HISTOGRAM Operating-hours counter SERVICE.TIME...
  • Page 126 Type 8792, 8793 REV.2 Auxiliary functions 16.1.24.4. Description of the DIAGNOSE main menu D.MSG – Diagnostic messages All generated diagnostic messages are listed in the D.MSG menu where they can be viewed and deleted. The status signal, which is assigned to the diagnostic message, is indicated by a symbol.
  • Page 127 Type 8792, 8793 REV.2 Auxiliary functions The status signals have different priorities. If several diagnostic messages are available with different status signals, the status signal with the highest priority is shown on the display. Overview of the status signals according to NE 107 (NE = NAMUR recommendation): Priority Status signal Meaning Failure Function check...
  • Page 128 Type 8792, 8793 REV.2 Auxiliary functions ADD.DIAGNOSE – Activation and deactivation of diagnostic functions Diagnostic functions can be activated in this menu and incorporated into the DIAGNOSE main menu or already activated diagnostic functions can be deactivated again. Activation of diagnostic functions: For a description see chapter “26.2.22.4. Activation of diagnostic functions”...
  • Page 129 Type 8792, 8793 REV.2 Auxiliary functions 16.1.24.5. Description of the diagnostic functions HISTOGRAM – Output of histograms The HISTOGRAM menu is divided into 2 parts: 1. O utputting the histograms for POS-Class (dwell time density) and DIR-Class (movement range) 2. List of the characteristic values for CMD Set-point position valve actuator...
  • Page 130 Type 8792, 8793 REV.2 Auxiliary functions Explanation of the histogram in the example Sinusoidal progression of the actuator position: Position 100% Time [t] Figure 43: Sinusoidal progression of the actuator position Histogram of the sinusoidal progression of the actuator position: Duration of histogram recording Largest dwell time density which occurred (tallest bar)
  • Page 131 Type 8792, 8793 REV.2 Auxiliary functions Explanation of the histogram in the example Sinusoidal progression of the actuator position: Position 100% Time [t] Figure 46: Sinusoidal progression of the actuator position Histogram of the sinusoidal progression of the actuator position: Duration of histogram recording Percentage of the change in direction class which occurred most...
  • Page 132 Type 8792, 8793 REV.2 Auxiliary functions Starting histograms: → Select START *. Hold down as long as countdown (5 ...) is running. Both histograms (POS-Class and DIR-Class) are started. → Change display view. Selection options: POS-Class (Histogram for the dwell time density), DIR-Class (Histogram for the movement range), SYSTEM-DATA (list of the characteristic values).
  • Page 133 Type 8792, 8793 REV.2 Auxiliary functions SERVICE.TIME – Operating-hours counter The operating-hours counter records the time during which the device was switched on. If the duty cycle reaches the specified time limit, a message is generated. • To do this, a history entry is made in the HISTORY submenu. For a description see “26.2.22.7. History entries in the HISTORY submenu”.
  • Page 134 Type 8792, 8793 REV.2 Auxiliary functions Display TRAVEL.ACCU Description of the functions The HUB submenu specifies the total stroke of the actuator piston. The TRAVEL.ACCU total stroke is automatically determined during the basic setting of the 20.0 mm device (running X.TUNE). LIMIT 1000000 cm In the case of an analog position sensor, the total stroke must be entered NEXT.M...
  • Page 135 Type 8792, 8793 REV.2 Auxiliary functions CYCLE.COUNTER – Direction reversal counter The direction reversal counter counts the number of changes in direction of the actuator piston. A change in direction is detected when the position of the actuator piston changes by at least 1%.
  • Page 136 Type 8792, 8793 REV.2 Auxiliary functions In addition to the monitor there is a temperature slave pointer. This indicates the lowest and highest of the measured temperature values. The slave pointer can be reset by pressing the key. CLEAR Display TEMP.CHECK Description of the functions CURRENT indicates the current temperature.
  • Page 137 Type 8792, 8793 REV.2 Auxiliary functions STROKE.CHECK – End position monitor The STROKE.CHECK function is used to monitor the physical end positions of the valve. In this way wear marks can be detected on the valve seat. To do this, a tolerance band is specified for the lower end position (position 0%) and for the upper end position (position 100%).
  • Page 138 Type 8792, 8793 REV.2 Auxiliary functions Enter lower end position tolerance ZERO.TOL. → Select OK. Acknowledge value. → Select MAX.TOL. → Select INPUT. Open input screen for lower end position tolerance. → Increase value <- Changing the decimal place Enter upper end position tolerance MAX.TOL.
  • Page 139 Type 8792, 8793 REV.2 Auxiliary functions Key: DEADBAND = adjustable tolerance DEADBAND band as%. COMP.TIME = adjustable time in seconds expected until the control deviation is compared with the tolerance band. DEV = control deviation COMP.TIME Figure 48: POS.MONITOR; schematic representation of position monitor Set the tolerance band and the compensation time as follows: →...
  • Page 140 Type 8792, 8793 REV.2 Auxiliary functions 16.1.24.6. History entries in the HISTORY submenu Each diagnostic function, which can output a message, has the HISTORY submenu. When the diagnostic message is actuated, a history entry is created with date and value. The history entries of the respective diagnostic function can be viewed and deleted in the HISTORY submenu.

  • Page 141: Manual Configuration Of X.tune

    Type 8792, 8793 REV.2 Auxiliary functions 16.2 Manual configuration of X.TUNE This function is required for special requirements only. For standard applications the X.TUNE function has been preset at the factory. See chapter “23.2. X.TUNE – Automatic adjustment of the position controller”. For special requirements the X.TUNE function, as described below, can be manually configured. Open the menu for the manual configuration of X.TUNE as follows: → Press MENU for 3 s. Switching from process level setting level.
  • Page 142 Type 8792, 8793 REV.2 Auxiliary functions 16.2.1.1. X.TUNE.CONFIG – Configuration of the X.TUNE function In this menu you can specify which functions are to be executed when the X.TUNE function is running automatically. Specify the functions in X.TUNE.CONFIG as follows: → Select X.TUNE.CONFIG. → Select ENTER.The functions for automatic self-parameterization by X.TUNE are displayed.
  • Page 143 Type 8792, 8793 REV.2 Auxiliary functions → Select INPUT. The input screen for the value of the upper end position is opened. → OPN Increase value CLS Changing the decimal place Approach upper end position of the valve. → Select OK. Transfer and simultaneous return to the CAL.POS menu.
  • Page 144 Type 8792, 8793 REV.2 Auxiliary functions → Increase speed - Reduce speed Minimize speed so that the progress bar moves as slowly as possible from right to left. Note: Do not minimize speed to such an extent that the progress bar remains in one position.

  • Page 145: Access To The Büs Service Interface

    Type 8792, 8793 REV.2 Access to the büS Service interface ACCESS TO THE BÜS SERVICE INTERFACE The büS service interface is located inside the device. → Remove the housing cover for access. → Ensure that a terminating resistor is used.
  • Page 146 Type 8792, 8793 REV.2 Access to the büS Service interface Position controller Parameter Diagnostics Maintenance DIAGNOSE ON/OFF BUS.COMM X.TUNE CONFIG.MSG ADD.FUNCTION ADD.DIAGNOSE CHARACT HISTOGRAM CUTOFF SERVICE.TIME DIR.CMD TRAVEL.ACCU DIR.ACT CYCLE.COUNTER SPLTRNG TEMP.CHECK X.LIMIT STROKE.CHECK X.TIME X.CONTROL PV.MONITOR POS.MONITOR SAFEPOS Table 50:...

  • Page 147: Operating Structure And Factory Setting

    Type 8792, 8793 REV.2 Operating structure and factory setting OPERATING STRUCTURE AND FACTORY SETTING The factory presets are highlighted in blue to the right of the menu in the operating structure. Examples: Menu options activated or selected at the factory Menu options not activated or selected at the factory 2%, 10 sec, ...
  • Page 148 Type 8792, 8793 REV.2 Operating structure and factory setting Automatic X.TUNE X.TUNE X.TUNE STARTED TUNE #0 INIT ... X.TUNE ready Manual X.TUNE X.TUNE.CONFIG X.TUNE.DBDx X.TUNE.PARAx X.TUNE.LEAKAGE X.TUNE.Ypwm X.TUNE.Yfric X.TUNE.POS ACT.limit ACT.nolimit POS.pMIN POS.pMAX X.TUNE.PWM yB.min TUNE.yB yE.min TUNE.yE time.open X.TUNE.AIR P.Q‘LIN...
  • Page 149 Type 8792, 8793 REV.2 Operating structure and factory setting P.Q‘LIN Q.LIN#0 Q.LIN#1 Q.LIN CMD=0% CMD=10% ... ready P.TUNE starting identifying calculating TUNE process tune control process PID parameters ready ADD.FUNCTION CHARACT CUTOFF DIR.CMD DIR.ACT SPLTRNG X.LIMIT X.TIME X.CONTROL P.CONTROL SECURITY SAFEPOS SIG.ERROR...
  • Page 150 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable auxiliary functions CHARACT linear GP 1:25 GP 1:33 GP 1:50 GP 25:1 GP 33:1 GP 50:1 Graph FREE GRAPH y 0 –> y 5 –> • • • y 100 –> 100%...
  • Page 151 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable auxiliary functions 1.0% X.CONTROL DBND 1.0% KXopn KXcls KDopn KDcls YBfric YEfric 1.0% P.CONTROL PID.PARAMETER DBND 1.0% 1.00 1.00 999.9 sec 999.9 0.0 sec FILTER SETUP PV-INPUT 4-20 mA Frequency PT 100 0.0 l/s...
  • Page 152 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable auxiliary functions SP-INPUT internal extern 0.0 l/s SP-SCALE SPmin 100.0 l/s SPmax 100.0 P.CO-INIT bumpless standard zeroinit 0000 SECURITY Access Code CODE MAIN MANU/AUTO ADDFUNCT X.TUNE P.Q‘LIN P.TUNE SAFEPOS Figure 55: Operating structure - 6 Only process controller Type 8793 Only for signal type frequency (P.CONTROL →...
  • Page 153 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable auxiliary functions SAFEPOS Safepos SIG.ERROR SP/CMD Input Error off Error on SAFEPOS SafePos off SafePos on PV Input Error off Error on SAFEPOS SafePos off SafePos on BINARY.IN SafePos Manu/Auto X.TUNE X.CO/P.CO BIN.IN type...
  • Page 154 Type 8792, 8793 REV.2 Operating structure and factory setting 1.0% OUT BIN 1 POS.Dev Deviation 1.0% POS.Lim-1 Limit 0.0% Safepos ERR.SP/CMD ERR.PV Remote Tune.Status DIAG.State-1 FAILURE OUT SPEZ FUNC.CHECK MAINTENANCE OUT.type normally open normally closed 1.0% OUT BIN 2 POS.Dev Deviation 1.0%...
  • Page 155 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable auxiliary functions CAL.USER calibr. POS POS.pMIN * Value is set for X.TUNE (automatic or manual). POS.pMAX ** Value is set by the manufacturer calibr. INP INP 4mA during device-specific calibration. INP 20mA 0 calibr.
  • Page 156 Type 8792, 8793 REV.2 Operating structure and factory setting EXTRAS DISP.ITEMS CMD/POS CMD/POS (t) SP/PV SP/PV (t) CLOCK INPUT TEMP X.TUNE P.TUNE P.LIN POS.SENSOR DIGITAL ANALOG tan.corr off TAN.CORRECTION tan.corr on ALPHA +/- 30° START-UP.ITEMS SERVICE Figure 59: Operating structure - 10...
  • Page 157 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable auxiliary functions START-UP.ITEMS CMD/POS CMD/POS (t) SP/PV SP/PV (t) CLOCK INPUT TEMP X.TUNE P.TUNE P.LIN DISP.MODE normal inverse DISP.LIGHT user active SERVICE SIMULATION Figure 60: Operating structure - 11 1) Only process controller Type 8793...
  • Page 158 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable auxiliary functions SIMULATION SIGNAL.sim SIGNAL.form Extern Sine Square Triangle Mixed 50.0% Offset 80.0% Amplitude 5.0 sec Period CONTROL.sim x.SIM p.SIM SIM.Gain 1.0 sec SIM.Delay DIAGNOSE D.MSG SERVICE.TIME TRAVEL.ACCU CYCLE.COUNTER TEMP.CHECK STROKE.CHECK PV.MONITOR POS.MONITOR...
  • Page 159 Type 8792, 8793 REV.2 Operating structure and factory setting TRAVEL.ACCU FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE CYCLE.COUNTER FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE TEMP.CHECK FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE STROKE.CHECK FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE PV.MONITOR FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE POS.MONITOR FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE ADD.DIAGNOSE...
  • Page 160 Type 8792, 8793 REV.2 Operating structure and factory setting ADD.DIAGNOSE HISTOGRAM SERVICE.TIME TRAVEL.ACCU CYCLE.COUNTER TEMP.CHECK STROKE.CHECK PV.MONITOR POS.MONITOR RESET.HISTORY Reset done Activatable diagnostic functions HISTOGRAM POS-Class DIR-Class SYSTEM-DATA 90d. 00h SERVICE.TIME LIMIT NEXT M. HISTORY 20.0 mm TRAVEL.ACCU 1,000,000 cm LIMIT NEXT.M...
  • Page 161 Type 8792, 8793 REV.2 Operating structure and factory setting Activatable diagnostic functions TEMP.CHECK CURRENT 60.0 °C LIMIT TEMP.MAX 0.0 °C TEMP.MIN HISTORY TEMP.MAX TEMP.MIN STROKE.CHECK 0.5% LIMIT ZERO.TOL LIMIT 0.5% MAX.TOL HISTORY ZERO 2.0% POS.MONITOR DEADBAND 10.0 sec COMP.TIME HISTORY 2.0% PV.MONITOR DEADBAND 10.0 sec...

  • Page 162: Ethernet/Ip, Profinet And Modbus Tcp

    Type 8792, 8793 REV.2 EtherNet/IP, PROFINET and Modbus TCP ETHERNET/IP, PROFINET AND MODBUS TCP 19.1 Technical data DANGER Risk of injury due to electric shock. ▶ Before reaching into the system, switch off the power supply and secure to prevent reactivation. ▶ Observe the applicable accident prevention regulations and safety regulations for electrical equipment.
  • Page 163 Type 8792, 8793 REV.2 EtherNet/IP, PROFINET and Modbus TCP EtherNet/IP specifications Predefined standard objects Identity Object (0x01) Message Router Object (0x02) Assembly Object (0x04) Connection Manager (0x06) DLR Object (0x47) QoS Object (0x48) TCP/IP Interface Object (0xF5) Ethernet Link Object (0xF6) DHCP...
  • Page 164 (for remote variant only) X1 - M12 circular plug, 8-pole X7 - M12 fieldbus connection (2 port Ethernet switch) Figure 65: Fieldbus connection, positioner Type 8792 19.2.2 Connection diagram Type 8793 X5 - M8 circular plug, 4-pole X1 - M12 circular plug, 8-pole X7 - M12 fieldbus...

  • Page 165: X7 - M12 Fieldbus Connection D-Coded

    Type 8792, 8793 REV.2 EtherNet/IP, PROFINET and Modbus TCP 19.3 X7 - M12 fieldbus connection D-coded The EtherNet/IP is connected with an M12 circular plug-in connector, 4-pole D-coded. Pin 1 Transmit + Pin 2 Receive + Pin 3 Transmit – Pin 4 Receive – Table 54: Electrical assignment EtherNet 19.4 X1 - M12 circular plug, 8-pole...

  • Page 166: X5 - M8 Circular Plug, 4-Pole - Process Actual Value (For Type 8793)

    Type 8792, 8793 REV.2 EtherNet/IP, PROFINET and Modbus TCP Connection of an analog, potentiometric position sensor: Assignment On the device side External circuit Potentiometer 1 Potenti- Sliding contact 2 ometer Potentiometer 3 Not assigned Table 57: Pin assignment; X4 - M8 socket - 4-pole - analog, potentiometer-type position sensor 19.6...

  • Page 167: Bus Status Display

    Type 8792, 8793 REV.2 EtherNet/IP, PROFINET and Modbus TCP NOTE To ensure electromagnetic compatibility (EMC), use a shielded Ethernet cable. Ground the cable shield on both sides, on each of the connected devices. For the grounding use a short line (max. 1 m) with a cross-section of at least 1.5 mm FE functional earth Figure 67: Functional earth 19.7 Bus status display The bus status is indicated on the display on the device. Display Device state Explanation Troubleshooting (is displayed approx.
  • Page 168 “16.1.15 BINARY.IN – Activation of the binary input” chapter “16.1.16 OUTPUT – Configuration of the outputs (option)” 19.7.2 BUS.COMM – Settings on Type 8792, 8793 Set the following menu options in the BUS.COMM menu for start-up of the EtherNet variant: Activate or deactivate approach of the safety position...

  • Page 169: 20 Büs Option

    Type 8792, 8793 REV.2 büS option BÜS OPTION 20.1 Definition büS is a fieldbus which is based on CANopen with additional functionality for networking several devices. 20.2 Interfaces Supply büS Position controller 8792 Input for process büS actual value* 4...20mA...
  • Page 170 Type 8792, 8793 REV.2 büS option 20.3.1.1. Connection diagram Type 8792 X4- M8 socket, 4-pole, optional (for remote variant only) X1 - M12 circular plug, 8-pole FE functional earth X3 - M12 circular plug, 5-pole Figure 68: Connection diagram Type 8792 20.3.1.2.

  • Page 171: X1 - M12 Circular Plug, 8-Pole

    Type 8792, 8793 REV.2 büS option 20.4 X1 - M12 circular plug, 8-pole Pin Assignment On the device side External circuit / signal level Not assigned Not assigned Operating voltage 24 V DC ± 10% + 24 V max. residual ripple 10% Input signal of the control center (e.g.

  • Page 172: X4 - M8 Socket, 4-Pole, Optional - Remote Sensor (For Remote Variant Only)

    Type 8792, 8793 REV.2 büS option 20.5 X4 - M8 socket, 4-pole, optional - Remote sensor (for remote variant only) Connection of the digital, non-contacting position sensor Type 8798: Assignment On the device side External circuit Supply sensor + Remote Sensor Supply sensor –...

  • Page 173: Accepting And Saving Sim Card Data (Option)

    Type 8792, 8793 REV.2 büS option Input Wire On the Assignment External circuit type* color ** switches*** device side Frequency brown Not assigned - exter- white Clock input + Clock + nally Switch on blue Clock input – Clock – supplied right black Not assigned...
  • Page 174 SIM card Figure 70: Inserting the SIM card 20.7.1 BUS.COMM – Settings on Type 8792, 8793 Set the following menu options in the BUS.COMM menu for start-up of the EtherNet variant: Activate or deactivate approach of the safety position BUS FAIL Selection SafePos off – The actuator remains in the position which corresponds to the set-point value last transferred (default setting).
  • Page 175 Type 8792, 8793 REV.2 büS option BUS.COMM is set as follows: → Press MENU for 3 s. Switching from process level setting level. Select BUS.COMM. Selection in the main menu (MAIN). → Select ENTER. The submenu options for basic settings can now be selected. Setting device address: (for büS devices the address is automatically set) →...

  • Page 176: Maintenance And Troubleshooting

    Type 8792, 8793 REV.2 Maintenance and troubleshooting MAINTENANCE AND TROUBLESHOOTING 21.1 Safety instruction WARNING Risk of injury due to incorrect maintenance work. ▶ Maintenance may be carried out only by trained technicians and with the appropriate tools. ▶ Secure the device against accidental activation. ▶ Ensure controlled start-up after maintenance.
  • Page 177 Type 8792, 8793 REV.2 Maintenance and troubleshooting 21.3.1 Error and warning messages while the X.TUNE function is running Display Causes of error Remedy TUNE Manual termination of self-optimi- err/break zation by pressing the key. EXIT X.TUNE locked The X.TUNE function is blocked.
  • Page 178 Type 8792, 8793 REV.2 Maintenance and troubleshooting 21.3.2 Error messages while running the P.Q'LIN function Display Causes of error Remedy TUNE Manual termination of self-optimization err/break by pressing the key. EXIT P.Q LIN No compressed air connected. Connect compressed air. ERROR 1 No change to process variable.
  • Page 179 Type 8792, 8793 REV.2 Maintenance and troubleshooting For Ethernet/IP, PROFINET, Modbus TCP Display Device state Explanation Troubleshooting (is displayed approx. every 3 seconds) • New connection established by BUS no Online, Device is connected correctly to connection the bus, the network access pro- master. no connection cedure has ended without errors, to the master.

  • Page 180: Malfunctions

    Type 8792, 8793 REV.2 Maintenance and troubleshooting 21.4 Malfunctions Problem Possible causes Remedy POS = 0 (when CMD > 0%) or Sealing function (CUTOFF) is Deactivate sealing POS = 100%, (when CMD < 100%). unintentionally activated. function. PV = 0 (when SP > 0) or PV = PV (when SP >...

  • Page 181: Accessories

    Type 8792, 8793 REV.2 Accessories ACCESSORIES Accessories Order number Connection cable with M12 socket, 8-pole, (length 5 m) 919267 Connection cable with M12 socket, 4-pole, (length 5 m) 918038 Connection cable with M8 socket , 4-pole, (length 5 m) 92903474 Connection cable with M12 circular plug, 4-pole, (length 5 m) D-coded On request USB büS interface set:...

  • Page 182: Packaging, Transport

    Type 8792, 8793 REV.2 Packaging, transport PACKAGING, TRANSPORT NOTE Transport damage. Inadequately protected devices may be damaged during transportation. • Protect the device against moisture and dirt in shock-resistant packaging during transportation. • Prevent the temperature from exceeding or dropping below the permitted storage temperature. STORAGE NOTE Incorrect storage may damage the device.

  • Page 183: Supplementary Information

    Type 8792, 8793 REV.2 Supplementary information SUPPLEMENTARY INFORMATION 26.1 Selection criteria for continuous valves The following criteria are crucial for optimum control behavior and to ensure that the required maximum flow is reached: • the correct selection of the flow coefficient which is defined primarily by the orifice of the valve;...
  • Page 184 Type 8792, 8793 REV.2 Supplementary information b) The pressure values, known at the input and output of the entire equipment (p and p ), at which the desired maximum flow rate Q shall be reached: step: Calculate the flow coefficient of the entire equipment k according to equation (1).

  • Page 185: Properties Of Pid Controllers

    Type 8792, 8793 REV.2 Supplementary information 26.2 Properties of PID controllers A PID controller has a proportional, an integral and a differential portion (P, I and D portion). 26.2.1 P portion Function: Kp is the proportional coefficient (amplification factor). It is the ratio of the adjustment range ∆Y and the proportional range ∆Xd.
  • Page 186 Type 8792, 8793 REV.2 Supplementary information 26.2.2 I portion Function: ∫ Ti is the integral action time or actuating time. It is the time which passes until the actuating variable has run through the whole adjustment range. Characteristic and step response of the I portion of a PID controller Ymax Ymin...
  • Page 187 Type 8792, 8793 REV.2 Supplementary information 26.2.3 D portion Function: ⋅ Kd is the derivative action coeffficient. The larger Kd is, the greater the D-effect is. Characteristic and step response of the D portion of a PID controller Step response Ramp response Figure 73: Characteristic and step response of the D portion of a PID controller...
  • Page 188 Type 8792, 8793 REV.2 Supplementary information 26.2.4 Superposition of P, I and D portions Function: ∫ ⋅ Where Kp Ti = Tn and Kd/Kp = Tv the function of the PID controller is calculated according to the fol- lowing equation: ∫...
  • Page 189 Type 8792, 8793 REV.2 Supplementary information 26.2.5 Implemented PID controller 26.2.5.1. D portion with delay In the process controller of the Type 8793 positioner the D portion is implemented with a delay T. Function: ⋅ ⋅ Superposition of P, I and DT portions Figure 75: Characteristic of superposition of P, I and DT portions 26.2.5.2.

  • Page 190: Adjustment Rules For Pid Controllers

    Type 8792, 8793 REV.2 Supplementary information 26.3 Adjustment rules for PID controllers The Type 8793 control system comes with a self-optimization function for the structure and parameters of the integrated process controller. The PID parameters determined can be viewed via the operating menu and empirically re-optimized as desired.
  • Page 191 Type 8792, 8793 REV.2 Supplementary information The controller parameters can then be calculated from K and T according to the following table. crit crit Setting the parameters according to Ziegler and Nichols Controller type Setting the parameters P controller Kp = 0.5 K crit PI controller Kp = 0.45 K Tn = 0.85 T...
  • Page 192 Type 8792, 8793 REV.2 Supplementary information 26.3.2 Adjustment rules according to Chien, Hrones and Reswick (Actuating Variable Jump Method) With this method the controller parameters are adjusted on the basis of the transient behavior of the controlled system. An actuating variable jump of 100% is output. The times Tu and Tg are derived from the progress of the actual value of the control variable.
  • Page 193 Type 8792, 8793 REV.2 Supplementary information Setting the parameters according to Chien, Hrones and Reswick Setting the parameters Controller type for aperiodic control process for control process (0% overshoot) with 20% overshoot Reference Malfunction Reference Malfunction Kp = P controller Kp = 0.3 · Kp = 0.3 ·...

  • Page 194: Table For Your Settings On The Positioner

    Type 8792, 8793 REV.2 Table for your settings on the positioner TABLE FOR YOUR SETTINGS ON THE POSITIONER 27.1 Settings of the freely programmed characteristic Node Valve stroke [%] (position set-point Date: Date: Date: Date: value as%) english...

  • Page 195: Table For Your Settings On The Type 8793 Process Controller

    Type 8792, 8793 REV.2 Table for your settings on the Type 8793 process controller TABLE FOR YOUR SETTINGS ON THE TYPE 8793 PROCESS CONTROLLER 28.1 Set parameters of the process controller Date: Date: Date: Date: DBND PVmin PVmax SPmin SPmax...
  • Page 196 www.burkert.com...

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