Burkert 8696 Operating Instructions Manual
  1. Manuals
  2. Brands
  3. Burkert Manuals
  4. Controller
  5. 8696
  6. Operating instructions manual

Burkert 8696 Operating Instructions Manual

Positioner top control basic, electropneumatic position controller
Hide thumbs Also See for 8696:
Table of Contents

Advertisement

Quick Links

Download this manual
Type 8696 REV.2
Positioner Top Control Basic
Electropneumatic Position Controller
Operating Instructions

Advertisement

Table of Contents
loading

Related Manuals for Burkert 8696

Summary of Contents for Burkert 8696

  • Page 1 Type 8696 REV.2 Positioner Top Control Basic Electropneumatic Position Controller Operating Instructions...
  • Page 2 We reserve the right to make technical changes without notice. Technische Änderungen vorbehalten. Sous réserve de modifications techniques. © Bürkert Werke GmbH & Co. KG, 2019 Operating Instructions 2002/00_EN-EN_00805905 / Original DE...

  • Page 3: Table Of Contents

    5.5.2 Features ........................15 5.5.3 Functional diagram of the positioner with single-acting actuator.......16 5.6 Type 8696 positioner ........................17 5.6.1 Schematic representation of the position control Type 8696 ........17 5.6.2 Functions of the positioner software ................18 5.7 Interfaces of the positioner ......................20 TECHNICAL DATA ..........................21 6.1 Conformity ..........................21 6.2...
  • Page 4 Type 8696, REV.2 6.4 Operating conditions .........................21 6.5 Mechanical data .........................22 6.6 Pneumatic data ..........................22 6.7 Type label ...........................22 6.8 UL additional label ........................23 6.9 Electrical data ..........................23 6.9.1 Electrical data, without fieldbus communication ............23 6.9.2 Electrical data, IO-Link ....................24 6.9.3 Electrical data, büS .....................24 6.10 Factory settings of the positioner .....................25 CONTROL AND DISPLAY ELEMENTS ....................26 7.1...
  • Page 5 Type 8696, REV.2 START-UP .............................47 11.1 Safety instructions ........................47 11.2 Specifying the standard settings ....................47 11.2.1 Running the automatic adjustment X.TUNE ..............47 11.3 Setting with Bürkert Communicator ..................49 11.3.1 Connecting IO-Link device with Bürkert Communicator ..........49 11.3.2 Connecting büS device with Bürkert Communicator ..........50 IO-LINK ..............................51 12.1 Information, IO-Link ........................51 12.2 Technical specifications, IO-Link ....................51 12.2.1 Configuration of the fieldbus ..................51 BÜS ...............................52 13.1 Information, büS .........................52...
  • Page 6 Type 8696, REV.2 14.2.5 X.CONTROL - Control parameters of the positioner ................66 14.2.6 SAFPOS - Definition of the safe position ..................66 14.2.7 SIG.ERROR - Configuration of cable break detection (only for variant without fieldbus communication) ............67 14.2.8 BINARY.IN (variant) - Configuration of the digital input (only for variant without fieldbus communication) .67 14.2.9 OUTPUT (variant) - Configuration of the analog output (only for variant without fieldbus communication) ............68 14.2.10 Setting the LED mode, device status .................68 SAFETY END POSITIONS ........................69 15.1 Safety end positions after failure of the electrical or pneumatic auxiliary power ....69 MAINTENANCE ............................69...

  • Page 7: About These Instructions

    ▶ Indicates an instruction for risk prevention. → Indicates a procedure which you must carry out. Indicates a result. Menu Indicates a interface text. Definition of terms In these instructions the term “device” denotes the following device types: Positioner Type 8696 REV.2 The term “büS” (Bürkert system bus) used in this instruction stands for the communication bus developed by Bürkert and based on the CANopen protocol. In these instructions, the abbreviation “Ex” always refers to “potentially explosive area”. english...

  • Page 8: Intended Use

    Type 8696, REV.2 Intended use INTENDED USE The Positoner Type 8696 REV.2 is designed to be mounted on pneumatic actuators of process valves for the control of media. The permitted fluid media are listed in the technical data. ▶ Use the device for its intended purpose only. Non-intended use of the device may be dangerous to peo- ple, nearby equipment and the environment. ▶ Correct transportation, correct storage as well as correct installation, commissioning, operation and maintenance are essential for reliable and problem-free operation. ▶ When using the device, observe the permitted data, operating conditions and application conditions. This information can be found in the contractual documents, the operating instructions and on the type label. ▶ Use the device only in conjunction with third-party devices and components recommended and autho- rized by Bürkert.

  • Page 9: Basic Safety Instructions

    Type 8696, REV.2 Basic safety instructions BASIC SAFETY INSTRUCTIONS These safety instructions do not consider any contingencies or incidents which occur during installation, operation and maintenance. The operator is responsible for observing the location-specific safety regulations, also with reference to the personnel. DANGER Risk of injury from high pressure and discharge of medium. ▶ Before working on the device or system, switch off the pressure. Vent or drain lines. DANGER Risk of injury from electric shock. ▶ Before working on the device or system, switch off the power supply. Secure against reactivation. ▶ Observe applicable accident prevention and safety regulations for electrical equipment. To prevent injury, ensure the following: ▶ Secure device or system to prevent unintentional activation.

  • Page 10: General Information

    Type 8696, REV.2 Basic safety instructions GENERAL INFORMATION Contact address Germany Bürkert Fluid Control System Sales Centre Chr.-Bürkert-Str. 13-17 D-74653 Ingelfingen Tel. + 49 (0) 7940 - 10 91 111 Fax + 49 (0) 7940 - 10 91 448 E-mail: info@burkert.com International Contact addresses can be found on the final pages of the printed operating instructions. And also on the internet at: www.burkert.com Warranty The warranty is only valid if the positioner Type 8696 is used as intended in accordance with the specified application conditions. Trademarks Brands and trademarks listed below are trademarks of the corresponding companies / associations / organizations Loctite Henkel Loctite Deutschland GmbH Information on the internet The operating instructions and data sheets for Type 8696 can be found on the Internet at: www.burkert.com...

  • Page 11: System Description

    Function of the positioner and combination with valve types Positioner Type 8696 is an electropneumatic position controller for pneumatically actuated control valves with single-acting actuators. Together with the pneumatic actuator, the positioner forms a functional unit. The control valve systems can be used for a wide range of control tasks in fluid technology and, depending on the application conditions, different process valves from the Bürkert range can be combined with the positioner.

  • Page 12: Features Of The Valve Types

    Type 8696, REV.2 System description The position of the actuator is regulated according to the position set-point value. The nominal position value is specified by an external standard signal. Pneumatically actuated piston actuators and rotary actuators can be used as an actuator. Single-acting actuators are offered in combination with the positioner. For single-acting actuators, only one chamber is aerated and deaerated during actuation. The generated pressure works against a spring. The piston moves until there is an equilibrium of forces between compressive...

  • Page 13: Model For Control Of Third-Party Devices

    Type 8696, REV.2 System description Model for control of third-party devices A special model enables the positioner Type 8696 to be attached to third-party devices. This model has a different basic housing so that the pilot air ports can be connected to the outside of the actuator. Electrical connection (circular plug-in connector) Exhaust air port (label: 3) Fastening screws (2 x) Pilot air port (label: 1) Basic housing Pilot air outlet 2 Pilot air outlet 2 Figure 2: Model for third-party devices ATTENTION! Damage or malfunction due to ingress of dirt and moisture.

  • Page 14: Structure Of The Positioner

    Type 8696, REV.2 System description Structure of the positioner The positioner Type 8696 consists of the micro-processor controlled electronics, the position sensor and the pilot valve system. The operation of the positioner takes place via 2 buttons and Bürkert Communicator. The pilot valve system for single-acting actuators consists of two solenoid valves.

  • Page 15: Features

    Type 8696, REV.2 System description 5.5.2 Features • Models for single-acting valve actuators. • Position sensor Contactless and therefore non-wearing position sensor. • Microprocessor-controlled electronics for signal processing, control and valve control. • Control module The operation of the device takes place via 2 buttons and Bürkert Communicator. • Pilot valve system The control system consists of 2 solenoid valves.

  • Page 16: Functional Diagram Of The Positioner With Single-Acting Actuator

    Type 8696, REV.2 System description 5.5.3 Functional diagram of the positioner with single-acting actuator The displayed functional diagram describes the function of the positioner (Type 8696). External position set-point value Position controller Actual Pilot valve system position 1: Aeriation valve Positioner 2: Bleed valve Position Pressure sensor supply Exhaust air Pneumatic...

  • Page 17: Type 8696 Positioner

    Pilot valve Valve set-point controller system value Position sensor Position control circuit Figure 5: Signal flow plan of positioner 5.6.1 Schematic representation of the position control Type 8696 Position set- point value DIR.ACT X.LIMIT X.CONTROL CMD* DBND DIR.CMD CHARACT SPLTRNG CUTOFF X.TIME...

  • Page 18: Functions Of The Positioner Software

    Type 8696, REV.2 System description 5.6.2 Functions of the positioner software Basic functions • Activation with buttons • Parameter setting with communications software Function Effect Valve closes tight outside the control range. Speci- Sealing function fication of the value (as %), from which the actuator is completely deaerated (when 0 %) or aerated CUTOFF (when 100 %) Characteristic correction Linearization of the operating characteristic can be implemented...
  • Page 19 Type 8696, REV.2 System description Auxiliary functions • Activation and parameter setting with communications software Function Effect Reversal of the effective direction of the actuator Assignment of the aeration status of the actuator chamber to the actual position. DIR.ACT Signal split range Standard signal as % for which the valve runs through the entire mechanical stroke range. SPLTRNG Stroke limit Limit the mechanical stroke range X.LIMIT...

  • Page 20: Interfaces Of The Positioner

    Type 8696, REV.2 System description Interfaces of the positioner Input for position Analog set-point value position feedback 4 – 20 mA (variant) Positioner 0 – 20 mA 3- or 4-wire Digital input 24 V DC Communications Operation interface 6) Or via fieldbus communication (büS/CANopen or IO-Link) 7) Factory setting is 4 –...

  • Page 21: Technical Data

    Type 8696, REV.2 Technical data TECHNICAL DATA Conformity In accordance with the EU Declaration of conformity, the positioner Type 8696 is compliant with the EU Directives. Standards The applied standards, which verify conformity with the EU Directives, can be found on the EU-Type Exami- nation Certificate and / or the EU Declaration of Conformity. Licenses The product is approved for use in zone 2 and 22 in accordance with ATEX directive 2014/34/EU category 3GD. Observe instructions on operation in an explosion-risk (Ex) area. Observe the ATEX additional instructions. The product is cULus approved. Instructions for use in the UL area see chapter “6.9 Electrical data”.

  • Page 22: Mechanical Data

    Type 8696, REV.2 Technical data Mechanical data Dimensions See data sheet Housing material exterior: PPS, PC, stainless steel, interior: PA 6; ABS Sealing material EPDM / FKM Stroke range of valve spindle: 2103 and 23xx series: 3 – 32 mm Third-party devices: (modified guide element required) 3 – 40 mm...

  • Page 23: Ul Additional Label

    Type 8696, REV.2 Technical data UL additional label Degree of protection Type 4X enclosure Circuit with limited power NEC Class 2 only E238179 Communication, Power Supply: b üS Supply voltage 24V ±25% Power consumption max. 3,5 W Figure 9: UL additional label (example) Electrical data WARNING! Only circuits with limited power may be used for UL approved components according to “NEC Class 2”. 6.9.1 Electrical data, without fieldbus communication...

  • Page 24: Electrical Data, Io-Link

    Type 8696, REV.2 Technical data 6.9.2 Electrical data, IO-Link Protection class III as per DIN EN 61140 (VDE 0140-1) Connection Circular plug-in connector M12 x 1, 5-pin, A-coded, Port Class B Operating voltage System supply (Pin 1+3) 24 V DC ±25 % (according to specification) Actuator supply (Pin 2+5) 24 V DC ±25 % (according to specification) Current consumption System supply (Pin 1+3) max. 50 mA Actuator supply (Pin 2+5) max. 100 mA Total power consumption max.

  • Page 25: Factory Settings Of The Positioner

    Type 8696, REV.2 Technical data 6.10 Factory settings of the positioner Functions can be activated via buttons: Function Parameter Value CUTOFF Sealing function below Sealing function above 98 % CHARACT Characteristic correction FREE Table 6: Factory settings Functions can be activated via communications software: Function Parameter Value INPUT Set-point value input 4 – 20 mA, 4-wire DIR.CMD...

  • Page 26: Control And Display Elements

    Type 8696, REV.2 Control and display elements CONTROL AND DISPLAY ELEMENTS The following chapter describes the operating states as well as the control and display elements of the positioner. For further information on the operation of the positioner, refer to chapter “11 Start-up”. Operating state To operate the buttons, make sure that the local control lock is deactivated/unlocked (factory setting): with communication software or fieldbus communication. AUTOMATIC (AUTO) Normal controller mode is implemented and monitored in AUTOMATIC operating state. MANUAL (MANU) In MANUAL operating state the valve can be opened and closed manually via the buttons. The manual LED is lit red. The buttons can be used to switch between the two operating states AUTOMATIC and MANUAL: → Press both buttons simultaneously between 2 s and 10 s (manual LED flashes at 5 Hz). english...

  • Page 27: Control And Display Elements Of The Positioner

    Type 8696, REV.2 Control and display elements Control and display elements of the positioner Button 1 Cutoff LED Charact LED Communications interface Manual LED Button 2 Status LED Figure 10: Description of the control elements ATTENTION! Breakage of the pneumatic connection pieces due to rotational impact. ▶ When unscrewing and screwing in the transparent cap, do not hold the actuator of the process valve but the basic housing.

  • Page 28: Configuration Of The Buttons

    Type 8696, REV.2 Control and display elements Configuration of the buttons To operate the buttons, make sure that the local control lock is deactivated/unlocked (factory setting): with communication software or fieldbus communication. The configuration of the 2 buttons varies depending on the operating state (AUTOMATIC / MANUAL). The description of the operating states (AUTOMATIC / MANUAL) can be found in the chapter entitled “7.1 Operating state”. Button 1 Button 2 Figure 12: Description of the buttons ATTENTION! Breakage of the pneumatic connection pieces due to rotational impact. ▶ When unscrewing and screwing in the transparent cap, do not hold the actuator of the process valve but the basic housing.
  • Page 29 Type 8696, REV.2 Control and display elements MANUAL operating status (manual LED is lit red): Button Function Press and hold Aerate (manually open / close the actuator) Press and hold Deaerate (manually open / close the actuator) 1 and 2 Press longer than 2 s Switching to AUTOMATIC ope- Manual LED flashes at 5 Hz simultane- (< 10 s) rating state (0 – 2 s)

  • Page 30: Display Of The Leds

    Type 8696, REV.2 Control and display elements Display of the LEDs Status LED Display of the device status and valve (RGB) Cutoff LED position Charact LED Cutoff LED CUTOFF active/ Manual LED inactive (yellow) Status LED Operating state HAND Manual LED active/inactive (red) CHARACT active/ Charact LED inactive (green) Figure 14: Display of the LEDs 7.4.1...

  • Page 31: Status Indicator

    Type 8696, REV.2 Control and display elements 7.4.4 Status indicator The status LED (RGB) show the device status. The user can set the following LED modes for the display of device status and valve position. • NAMUR mode • Valve mode • Valve mode with warnings (factory setting) • Fixed color • LED off The LED mode and the colors of the valve position can be set with the Bürkert Communicator. IO-Link: The LED mode and the colors of the valve position can be also set with an acyclic parameter (see para- meter list). The description for setting the LED mode can be found in the chapter “14.2.10 Setting the LED mode, device status”. 7.4.4.1 Valve mode Displays in valve mode: • Valve position: open, half-way, closed •...
  • Page 32 Type 8696, REV.2 Control and display elements If several device statuses exist simultaneously, the device status with the highest priority is displayed. Valve position Device status Failure Function check Out of Maintenance specification required Status, Status, color Status, color Status, color color Open flashes red flashes orange flashes yellow flashes blue...

  • Page 33: Error Messages

    Type 8696, REV.2 Control and display elements Error messages 7.5.1 Messages for device status “Out of specification“ Message Description Procedure Temperature limit Ambient temperature is too Reduce ambient temperature. If problems exceeded high continue, contact your Bürkert Service Center Temperature limit not Ambient temperature is too low Increase ambient temperature achieved Voltage limit exceeded Supply voltage is too high...
  • Page 34 Type 8696, REV.2 Control and display elements IO-Link error No valid process data is - Check connection to the IO-Link master received - Check whether valid setpoints are sent to the device via the IO-Link interface X.TUNE error occurred The last X.TUNE was not -Check compressed air supply successful -Run X.TUNE again...

  • Page 35: Installation

    ▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation. ▶ Observe applicable accident prevention and safety regulations for electrical equipment. WARNING! Risk of injury from improper installation. ▶ Installation may be carried out by authorised technicians only and with the appropriate tools. Risk of injury from unintentional activation of the system and an uncontrolled restart. ▶ Secure system from unintentional activation. ▶ Following assembly, ensure a controlled restart. Installation of the positioner Type 8696 to process valves of series 2103, 2300 and 2301 ATTENTION! When mounting on process valves with a welded connection, follow the installation instructions in the operating instructions for the process valve. Procedure: 1. Install switch spindle Transparent cap Pilot air ports...
  • Page 36 Type 8696, REV.2 Installation → For version with plug-in hose connector, remove the collets (white nozzles) from both pilot air ports (if present). Puck Switch spindle Guide element Groove ring max. 1 Nm max. 5 Nm Actuator cover O-ring Spindle extension Figure 16: Installing the switch spindle, series 2103, 2300 and 2301 ATTENTION! Improper installation may damage the groove ring in the guide element. The groove ring is already be pre-assembled in the guide element and must be “locked into position” in the undercut. ▶ When installing the switch spindle, do not damage the groove ring.
  • Page 37 Type 8696, REV.2 Installation 2. Install sealing rings → Pull the form seal onto the actuator cover (smaller diameter points upwards). → Check that the O-rings are correctly positioned in the pilot air ports. When the positioner is being installed, the collets of the pilot air ports must not be fitted to the actuator. Pilot air ports Caution: Collets must not be fitted ! Form seal Installation of the form seal Figure 17: Installation of the sealing rings 3. Install positioner...
  • Page 38 Type 8696, REV.2 Installation Connection pieces Guide rail Puck Guide rail Puck Figure 18: Aligning the puck → Push the positioner, without turning it, onto the actuator until no gap is visible on the form seal. ATTENTION! Too high torque when screwing in the fastening screw does not ensure degree of protection IP65 / IP67. ▶ The fastening screws may be tightened to a maximum torque of 1.5 Nm only. → Attach the positioner to the actuator using the two side fastening screws. In doing so, tighten the screws only hand-tight (max. torque: 1.5 Nm).

  • Page 39: Rotating The Actuator Module For Process Valves Belonging To Series 2300 And 2301

    Type 8696, REV.2 Installation Rotating the actuator module for process valves belonging to series 2300 and 2301 The actuator module (positioner and actuator) can be rotated for straight seat valves and angle seat valves belonging to series 2300 and 2301 only. The position of the connections can be aligned steplessly by rotating the actuator module (positioner and actuator) through 360°. Only the entire actuator module can be rotated. The positioner cannot be rotated contrary to the actuator. The process valve must be in the open position for alignment of the actuator module. DANGER! Risk of injury from high pressure in the equipment/device. ▶ Before working on equipment or device, switch off the pressure and deaerate/drain lines. Procedure: → Clamp valve body in a holding device (only required if the process valve has not yet been installed). → Control function A: Open process valve. Actuator module...
  • Page 40 Type 8696, REV.2 Installation → Using a suitable open-end wrench, counter the wrench flat on the pipe. → Place suitable open-end wrench on the hexagon of the actuator. WARNING! Risk of injury from discharge of medium and pressure. If the direction of rotation is wrong, the body interface may become detached. ▶ Rotate the actuator module counter-clockwise only (see “Figure 21”). → Rotate counter-clockwise (as seen from below) to bring the actuator module into the required position. Open-end wrench Series 23xx Figure 21: Rotating open-end wrench english...

  • Page 41: Pneumatic Installation

    Type 8696, REV.2 Pneumatic installation PNEUMATIC INSTALLATION DANGER! Risk of injury from high pressure in the equipment/device. ▶ Before working on equipment or device, switch off the pressure and deaerate/drain lines. WARNING! Risk of injury from improper installation. ▶ Installation may be carried out by authorised technicians only and with the appropriate tools. Risk of injury from unintentional activation of the system and an uncontrolled restart. ▶ Secure system from unintentional activation. ▶ Following installation, ensure a controlled restart. Pilot air port (label: 1) Exhaust air port (label: 3) Figure 22: Pneumatic connection Procedure: →...
  • Page 42 Type 8696, REV.2 Pneumatic installation Important information for the problem-free functioning of the device: ▶ The installation must not cause back pressure to build up. ▶ Select a hose for the connection with an adequate cross-section. ▶ The exhaust air line must be designed in such a way that no water or other liquid can get into the device through the exhaust air port. ▶ Keep the adjacent supply pressure always at least 0.5 – 1 bar above the pressure which is required to move the actuator to its end position. This ensures that the control behavior is not extremely negatively affected in the upper stroke range on account of too little pressure difference.

  • Page 43: Electrical Installation

    Type 8696, REV.2 Electrical installation ELECTRICAL INSTALLATION All electrical inputs and outputs of the device are not galvanically isolated from the supply voltage. 10.1 Safety instructions DANGER! Risk of electric shock. ▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation. ▶ Observe applicable accident prevention and safety regulations for electrical equipment. WARNING! Risk of injury from improper installation. ▶ Installation may be carried out by authorized technicians only and with the appropriate tools. Risk of injury from unintentional activation of the system and an uncontrolled restart. ▶ Secure system from unintentional activation.

  • Page 44: Electrical Installation Without Fieldbus Communication

    Type 8696, REV.2 Electrical installation 10.2 Electrical installation without fieldbus communication Circular plug M12 x 1, 8-pin Figure 23: Circular plug M12 x 1, 8-pin → Connect the pins according to the model of the positioner. Input signals of the control center (e.g. PLC), circular plug M12 x 1, 8-pin...
  • Page 45 Type 8696, REV.2 Electrical installation Circular plug M12 x 1, 8-pin Figure 24: Circular plug M12 x 1, 8-pin Output signals to the control center (e.g. PLC), circular plug M12 x 1, 8-pin (required for analogue output variant only) Wire color...

  • Page 46: Electrical Installation, Io-Link

    Type 8696, REV.2 Electrical installation 10.3 Electrical installation, IO-Link Figure 25: Pin assignment, Port Class B Designation Configuration 24 V DC System supply 24 V DC Actuator supply L – 0 V (GND) System supply IO-Link 0 V (GND) Actuator supply Table 23: Pin assignment 10.4 Electrical Installation, büS...

  • Page 47: Start-Up

    Type 8696, REV.2 Start-up START-UP 11.1 Safety instructions DANGER! Risk of electric shock. ▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation. ▶ Observe applicable accident prevention and safety regulations for electrical equipment. WARNING! Risk of injury from improper operation. Improper operation may result in injuries as well as damage to the device and the area around it. ▶ Before start-up, ensure that the operating personnel are familiar with and completely understand the contents of the operating instructions.
  • Page 48 Type 8696, REV.2 Start-up ATTENTION! Breakage of the pneumatic connection pieces due to rotational impact. ▶ When unscrewing and screwing in the transparent cap, do not hold the actuator of the process valve but the basic housing. Transparent cap Body casing Basic housing Actuator Figure 27: Open positioner → Screw off the transparent cap of the positioner to operate the buttons. → Start the X.TUNE by pressing button 1 for 5 s.

  • Page 49: Setting With Bürkert Communicator

    Type 8696, REV.2 Start-up 11.3 Setting with Bürkert Communicator The Bürkert Communicator can be used to make all settings on the device. The settings in the Bürkert Communicator can be found in the operating manual. 11.3.1 Connecting IO-Link device with Bürkert Communicator Required components: • Communications software: Bürkert Communicator for PC • USB-büS interface set (see accessories) • büS adapter for communications interface (see accessories) • If necessary, a büS cable extension (see accessories) ATTENTION Breakage of the pneumatic connection pieces due to rotational impact. ▶ When opening or closing the device, do not press against the actuator, but against the basic housing. → Screw off the transparent cap by turning counterclockwise. Transparent cap Body casing Basic housing Actuator...

  • Page 50: Connecting Büs Device With Bürkert Communicator

    Type 8696, REV.2 Start-up 11.3.2 Connecting büS device with Bürkert Communicator Required components: • Communications software: Bürkert Communicator for PC • USB-büS interface set (see accessories) → Establish connection to PC with USB-büS interface set. → Starting Bürkert Communicator. → Implementing settings. english...

  • Page 51: Io-Link

    Type 8696, REV.2 IO-Link IO-LINK 12.1 Information, IO-Link IO-Link is an internationally standardized IO technology (IEC 61131-9) to enable sensors and actuators to communicate. IO-Link is a point-to-point communication with 3-wire connection technology for sensors and actuators and unshielded standard sensor cables. To ensure clear communication, the IO-Link devices should not be parameterised simultaneously by the higher-level controller (PLC) via the IO-Link master and with the Bürkert Communicator (via the communi- cation interface). 12.2 Technical specifications, IO-Link IO-Link specifications V1.1.2 Supply via IO-Link (M12 x 1, 5-pin, A-coded) Port Class SIO mode...

  • Page 52: 13 Büs

    Type 8696, REV.2 büS BÜS 13.1 Information, büS büS is a system bus developed by Bürkert with a communication protocol based on CANopen. 13.2 Configuration of the fieldbus The required start-up files and the description of objects are available on the Internet. Download from: www.burkert.com / Type 8696 / Software english...

  • Page 53: Operation And Function

    Type 8696, REV.2 Operation and function OPERATION AND FUNCTION The positioner Type 8696 has different basic and additional functions which can be configured and param- eterized via the DIP switches or the communications software. 14.1 Basic functions The following basic functions can be activated via the buttons. The parameter settings for the sealing function (CUTOFF) and characteristic correction (CHARACT) are made with the communication software. Function Description Button LED is lit LED is not lit Sealing function Sealing function for Cutoff LED (yellow) Cutoff LED (yellow) positioner CUTOFF Sealing function on Sealing function off Characteristic Selection of the Transfer...
  • Page 54 Type 8696, REV.2 Operation and function ATTENTION! Damage or malfunction due to penetration of dirt and humidity. ▶ To observe degree of protection IP65 / IP67, screw the transparent cap in all the way. → Close the device (assembly tool: 674078 The following basic function can be changed via the communications software only. Function Description Factory setting Standard signal Entry of the standard signal input 4 – 20 mA, 4-wire for the set-point value INPUT Reversal of the Effective direction between input OFF (fall) effective direction set-...

  • Page 55: Dir.cmd

    Type 8696, REV.2 Operation and function 14.1.1 DIR.CMD - Reversal of the effective direction of the positioner set-point value You can use this function to adjust the effective direction between the input signal (INPUT) and the nominal position of the actuator. Factory setting: OFF (ascending) Position Function Reversal of the effective direction of the set-point value (DIR.CMD) (set-point value 20 – 4 mA corresponds to position 0 – 100 %), fall Normal effective direction of the set-point value (set-point value 4 – 20 mA corresponds to position 0 – 100 %), rise Table 27: Effective direction Nominal position rise fall Input signal...

  • Page 56: Cutoff

    Type 8696, REV.2 Operation and function 14.1.2 CUTOFF - Sealing function for the positioner This function causes the valve to be sealed outside the control range. Control mode resumes at a hysteresis of 1%. Factory setting: OFF (no sealing function) Position Function Sealing function active. The valve completely closes below 2 % and opens above 98 % of the set-point value (CUTOFF) No sealing function Table 28: Sealing function The communications software can be used to change the limits for the position set-point value as a percentage. Activation in the device has priority over the communications software, i.e. settings of the sealing function (CUTOFF) which are modified via the communications software are only active if cutoff LED in the positioner lights up yellow. Valve stroke [%] Adjustable from 75 – 100 % Set-point value [%] Adjustable from 0 – 25 % Figure 33: CUTOFF graph 24) Factory setting can be changed via communications software.

  • Page 57: Charact

    Type 8696, REV.2 Operation and function 14.1.3 CHARACT - Characteristic correction between input signal (position set- point value) and stroke Characteristic (customer-specific characteristic) This function can be used to activate a transfer characteristic with respect to set-point value (set-point position) and valve stroke for correction of the flow-rate or operating characteristic. The transfer characteristic can be changed via the communications software only. Factory setting: OFF (linear) Position Function Correction characteristic for adjustment of the operating characteristic (linearization of the process characteristic CHARACT) Linear characteristic Table 29: Characteristic correction Activation in the device has priority over the communications software, i.e. settings of the char-...
  • Page 58 Type 8696, REV.2 Operation and function The flow characteristic k = f(s) indicates the flow-rate of a valve, expressed by the value k as a function of the stroke s of the actuator spindle. It is determined by the design of the valve seat and the seat seal. In general two types of flow characteristics are implemented, the linear and the equal percentage. In the case of linear characteristics, equal k value changes dk are assigned to equal stroke changes ds. = n ⋅ ds). In the case of an equal percentage characteristic, an equal percentage change of the k value corresponds to a stroke change ds. ⋅ ds). = n eqlprct The operating characteristic Q = f(s) specifies the correlation between the volumetric flow Q in the installed valve and the stroke s. This characteristic has the properties of the pipelines, pumps and consumers. It therefore exhibits a form which differs from the flow characteristic.

  • Page 59: Input

    Type 8696, REV.2 Operation and function Entering the freely programmable characteristic The characteristic is defined by 21 nodes distributed uniformly over the position set-point values ranging from 0 – 100 %. They are spaced at intervals of 5 %. A freely selectable stroke (adjustment range 0 – 100 %) is assigned to each node. The difference between the stroke values of two adjacent nodes must not be greater than 20%. Example of a programmed characteristic Valve stroke [&] Unit signal [%] 90 100 4 – 20 mA 0 – 20 mA Fig. 35: Example of a programmed characteristic 14.1.4 INPUT - Enter the standard signal (only variant without fieldbus communication) Under this menu option, enter the unit signal used for the set-point value.

  • Page 60: Reset

    Type 8696, REV.2 Operation and function 14.1.5 RESET - Reset to factory settings This function can be used to reset the positioner to the factory settings. 14.1.6 X.TUNE - Automatic adjustment of the positioner to the relevant operating conditions The X.TUNE function must be run for a function check of the positioner to adjust to specific local features. WARNING! While the X.TUNE function is running, the valve automatically moves from its current position. ▶ Never run X.TUNE while a process is running. ▶ Take appropriate measures to prevent the system / positioner from being unintentionally actuated.

  • Page 61: Auxiliary Functions

    Type 8696, REV.2 Operation and function 14.2 Auxiliary functions The following additional functions can be configured and parameterized via the communications software: Function Description Reversal of the effective Assignment of the aeration status of the actuator chamber to the actual direction of the actuator position DIR.ACT Signal split range Signal split range; input signal as a % for which the valve runs through the entire stroke range. SPLTRNG Stroke limit Limit the mechanical stroke range X.LIMIT Limit actuating time Limit the control speed X.TIME...

  • Page 62: Dir.act

    Type 8696, REV.2 Operation and function 14.2.1 DIR.ACT - Reversal of the effective direction of the actuator Use this function to set the effective direction between the aeration state of the actuator and the actual position. Factory setting: Off (rise) Direct effective direction (deaerated → 0 %; aerated 100 %) Rise: Inverse effective direction (deaerated → 100 %; aerated 0 %) Case: Actual position increasing decreasing Aeration state deaerated aerated Figure 36: DIR.ACT graph english...

  • Page 63: Spltrng

    Type 8696, REV.2 Operation and function 14.2.2 SPLTRNG - Signal split range Minimum and maximum values of the input signal as a % for which the valve runs through the entire stroke range. Factory setting: Lower signal range split = 0 %; Upper signal range split = 100 % Lower value split range: I nput the minimum value of the input signal as a % Adjustment range: 0 – 75 % Upper value split range: I nput the maximum value of the input signal as a % Adjustment range: 25 – 100 % Use this function to limit the position set-point value range of the positioner by specifying a minimum and a maximum value. This makes it possible to divide a unit signal range that is used (4 – 20 mA, 0 – 20 mA) into several positioners (without or with overlapping). This allows several valves to be used alternately or, in the case of overlapping set-point value ranges, simultaneously as actuators. To split a unit signal range into two set-point value ranges:...

  • Page 64: X.limit - Stroke Limit

    Type 8696, REV.2 Operation and function 14.2.3 X.LIMIT - Stroke limit This function limits the (physical) stroke to specified % values (lower and upper). In doing so, the stroke range of the limited stroke is set equal to 100 %. If the limited stroke range is left during operation, negative actual positions or actual positions greater than 100 % are shown. Factory setting: Lower position limit = 0 %, upper position limit = 100 % Adjustment ranges: Stroke limit minimum: 0 – 50 % of the entire stroke Stroke limit maximum: 50 – 100 % of the entire stroke The minimum distance between the upper and lower stroke limit is 50 %. Therefore if one value is entered with a minimum distance of < 50 % the other value is adjusted automatically. Limited Physical stroke (%) stroke (%) Unlimited stroke Limited stroke Set-point value [mA] (INPUT) Figure 38: X.LIMIT graph english...

  • Page 65: X.time

    Type 8696, REV.2 Operation and function 14.2.4 X.TIME - Limit actuating time Use this function to specify the opening and closing times for the entire stroke and thereby limit control speeds. When the X.TUNE function is running, the minimum opening and closing time for the entire stroke is automatically entered for Open and Close. Therefore, movement can be at maximum speed. Factory setting: values determined at the factory by the X.TUNE function If the control speed will be limited, values can be input for Open and Close which are between the minimum values determined by the X.TUNE and 60 seconds. Opening time: Opening time for entire stroke (in seconds) Adjustment range: 1 – 60 seconds Closing time: C losing time for entire stroke (in seconds) Adjustment range: 1 – 60 seconds...

  • Page 66: Control Parameters Of The Positioner

    Type 8696, REV.2 Operation and function 14.2.5 X.CONTROL - Control parameters of the positioner Use this function to set the parameters for the positioner (dead band and amplification factors (kp)). Deadband: Insensitivity range of the positioner Entry for the deadband as a % in reference to the scaled stroke range; i.e. stroke limit maximum - stroke limit minimum (see auxiliary function stroke limit (X.LIMIT)). This function causes the controller to respond only beginning at a specific control difference. This function saves wear on the solenoid valves in the positioner and the pneumatic actuator. If the auxiliary function control parameters (X.CONTROL) is in the main menu while X.TUNE (Autotune of the positioner) is running, the deadband is determined automatically depending on the friction behavior of the actuator. The value determined in this way is an approximate value. You can re-adjust it manually. Xd1‘ Control Position set-...

  • Page 67: Sig.error

    Type 8696, REV.2 Operation and function 14.2.7 SIG.ERROR - Configuration of cable break detection (only for variant without fieldbus communication) The cable break detection function (SIG.ERROR) is used to detect a fault on the input signal. Cable break detection can be selected for a 4 – 20 mA signal only: Fault if input signal ≤ 3.5 mA (± 0.5 % of final value, hysteresis 0.5 % of final value) If 0 – 20 mA is selected, cable break detection cannot be selected. A signal error is indicated on the device by the LED 1 for activated cable break detection (error or out of spezification). Safety position for activated cable break detection: Active safe position function (SAFEPOS) If a fault is detected, the actuator moves to the position set under safe position function.

  • Page 68: Output (Variant)

    Type 8696, REV.2 Operation and function 14.2.9 OUTPUT (variant) - Configuration of the analog output (only for variant without fieldbus communication) The function analog output (OUTPUT) only appears in the selection of functions if the positioner has an analog output (variant) or if no parameters have been read in yet. The analog output can be used for feedback of the current position or of the set-point value to the control center. Function P osition (POS) Output of the current position Set-point value (CMD) Output of the set-point value Standard signal 4 – 20 mA Selection of the standard signal 0 –...

  • Page 69: Safety End Positions

    Actuator System Designation electrical pneumatic single-acting down not defined control function A down single-acting not defined control function B down Table 32: Safety end positions MAINTENANCE The positioner Type 8696 is maintenance-free when operated according to the instructions in this manual. english...

  • Page 70: Disassembly

    Type 8696, REV.2 Disassembly DISASSEMBLY 17.1 Safety instructions DANGER! Risk of injury from high pressure in the equipment/device. ▶ Before working on equipment or device, switch off the pressure and deaerate/drain lines. Risk of electric shock. ▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation. ▶ Observe applicable accident prevention and safety regulations for electrical equipment. WARNING! Risk of injury from improper disassembly. ▶ Disassembly may be carried out by authorized technicians only and with the appropriate tools. Risk of injury from unintentional activation of the system and an uncontrolled restart. ▶ Secure system from unintentional activation. ▶ Following disassembly, ensure a controlled restart. 17.2 Disassembly the positioner Procedure: 1. Pneumatic connection DANGER! Risk of injury from high pressure in the equipment/device.
  • Page 71 Type 8696, REV.2 Disassembly 2. Electrical connection DANGER! Risk of electric shock. ▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation. ▶ Observe applicable accident prevention and safety regulations for electrical equipment. → Loosen the circular plug-in connector. 3. Mechanical connection → Loosen the fastening screws. → Remove the positioner upwards. Positioner Electrical connection circular plug-in connector Pneumatic connections...

  • Page 72: Accessories

    Type 8696, REV.2 Accessories ACCESSORIES Designation Order no. Communication software Bürkert Communicator Information at www.burkert.com Connection cable M12 x 1, 8-pole 919061 Wrench for opening/closing the transparent cap 647078 USB-büS interface set: USB-büS interface set (büS stick + 0.7 m cable with M12 plug) 772551 büS adapter for communication interface 773254 (M12 on büS service interface Micro-USB) büS cable extension (M12 pin to M12 socket), length 1 m 772404 büS cable extension (M12 pin to M12 socket), length 3 m 772405 büS cable extension (M12 pin to M12 socket), length 5 m 772406 büS cable extension (M12 pin to M12 socket), length 10 m 772407 Table 33: Accessories 18.1 Communications software The PC operating program Bürkert Communicator is designed for communication with the devices from the Bürkert positioner family. A detailed description and precise schedule of the procedure for the installation and operation of the software can be found in the associated documentation.

  • Page 73: Transportation, Storage, Disposal

    Type 8696, REV.2 Transportation, storage, disposal TRANSPORTATION, STORAGE, DISPOSAL ATTENTION Damage in transit due to inadequately protected devices. ▶ Protect the device against moisture and dirt in shock-resistant packaging during transportation. ▶ Observe permitted storage temperature. ATTENTION Incorrect storage may damage the device. ▶ Store the device in a dry and dust-free location. ▶ Storage temperature: -20 to +65 °C ATTENTION Damage to the environment caused by device components contaminated with media.
  • Page 74 Type 8696, REV.2 english...
  • Page 75 www.burkert.com...

Table of Contents