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Pavone Systems MC 755 Technical Manual

Loss-in-weight flow regulator
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TECHNICAL MANUAL
MC 755
Loss-in-weight flow regulator
Software version 400.01

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Summary of Contents for Pavone Systems MC 755

  • Page 1 TECHNICAL MANUAL MC 755 Loss-in-weight flow regulator Software version 400.01...

  • Page 2: Symbols

    SYMBOLS Following are the symbols used throughout the manual to call reader’s attention: Warning! Electrical Shock Risk. Warning! This operation shall be carried out by qualified staff. Pay special attention to the following points. Further details. WARNINGS - This manual provides texts and pictures to inform the operator about all prescriptions and criteria necessary for installing and using this instrument.

  • Page 3: Table Of Contents

    INDEX Symbols ..................................... 2 EU Declaration of conformity (DoC) ........................6 The MC755 can operate as follows according to its setup: ................7 FLOW RATE TRANSMITTER ............................7 1 - INTRODUCTION................................. 7 1.1 - other function of mC755 ............................ 9 1.2 - TECHNICAL CHARACTERISTICS ........................10 2 - MC755 INSTALLATION ............................13 2.1 - INSTALLATION WARNINGS AND INDICATIONS ..................13...
  • Page 4 3.1 - ELECTRONIC START-UP .............................23 3.2 - GENERAL DATA DISPLAY ...........................23 3.3 - ACCESS METHOD TO THE SETUP MENU .....................24 3.4 -PARAMETER PROGRAMMING METHOD .......................24 3.5 - TOTAL QUADRANT .............................25 3.6 - QUADRANTE: SET POINT ..........................25 3.7 - FLOW RATE QUADRANT............................26 3.8 - STATUS AND TIMER QUADRANT ........................26 3.9 - DIAL 6: CURRENT WEIGHT ..........................27 3.10 - DIAL 7: WEIGHT ASSESSED IN THE LAST SAMPLING PERIOD ............27...
  • Page 5 5.9 - TECHNICAL NOTE: FIRMWARE UPDATE .......................36 5.10 - TECHNICAL NOTE: DATA LOGGER .......................37 5.11 - TECHNICAL NOTE: FILE MANAGEMENT ....................37 5.12 - TECHNICAL NOTE: ON FLOW RATE ADJUSTMENT ................37 5.13 - TECHNICAL NOTE: MANUAL OUTPUT ASSOCIATED WITH THE SET POINT ........38 5.14 - TECHNICAL NOTE: GENERAL TOTAL ......................38 5.15 - IN-OUT TEST PROCEDURES ...........................39 5.16 - SIMULATION PROCEDURE ..........................39...

  • Page 6: Eu Declaration Of Conformity (Doc)

    EU DECLARATION OF CONFORMITY (DOC) Pavone Sistemi S.r.l. Via Tiberio Bianchi, 11/13/15 20863 Concorezzo, MB declare that the DoC issued under our sole responsibility and belongs to the following product: Apparatus model/Product: MC755 Type: Weighing instrument The object of the declaration described above used as indicated in the installation manual and use, is in conformity with the relevant Union harmonisation legislation: Directive EMC 2014/30/EU Electromagnetic Compatibility The following harmonized standards and technical specification have been applied:...

  • Page 7: The Mc755 Can Operate As Follows According To Its Setup

    1 - INTRODUCTION The MC755 can operate as follows according to its setup: FLOW RATE TRANSMITTER Thanks to the weight decrease (load cells), when the instrument receives the run input, it calculates an instantaneous flow rate which is then transmitted externally through a configurable analog output (0-10 V, 0-5 V, 0-20 mA, 4-20 mA).
  • Page 8 During the metering process, the instrument measures the instantaneous flow rate every second, by calcu- lating the decrease of weight according to that unit of time. Based on this value, it calculates the flow rate per hour, that is how much the system would meter per hour if the extractor would operate at the same speed and the decrease of weight would be constant.

  • Page 9: Other Function Of Mc755

    1.1 - OTHER FUNCTION OF MC755 MASTER-SLAVE OPERATION The instrument may operate as slave, in this case Set Point may vary through an analogue (0-10V / 4-20mA / 0-20mA) or digital (RS485) input. Flow rate Set Point will adjourn proportionally to the current input. Input full scale (100%) corresponds to the active Set Point value on the instrument.

  • Page 10: Technical Characteristics

    1.2 - TECHNICAL CHARACTERISTICS STRUCTURAL FEATURES Made of aluminium with polycarbonate screen Front panel Protection class: IP 65 Overall dimensions: 202 mm x 134 mm (l x h) Built-in panel front. Assembly Drilling template 190 mm x 117 mm (l x h) Fixing by means of 4 metallic threaded rods 3 mm rubber seal along all perimeter Aluminum cover...
  • Page 11 LOAD CELLS INPUT No. of channels 1 input channels for load cells. Cells supply 5 Vdc 240 mA (max 16 cells of 350 ohm), Protected against short circuit. Input sensitivity 0.02 microV min Linearity < 0.01% of the scale end Temperature warmup drift <...

  • Page 12: Communication Ports

    LOGIC I/O No. of channels 6 opto-isolated logic outputs (clean contact on board max 30 Vdc, 0.1A) 6 iopto-isolated logic inputs on board (7.5 - 24 Vdc PNP) Output power 30 Vdc max / 60 mA cad. Input voltage 12 ÷ 24Vdc (external supply) Additional I/O Up to 4 external modules with 4 in.

  • Page 13: Mc755 Installation

    2 - MC755 INSTALLATION 2.1 - INSTALLATION WARNINGS AND INDICATIONS Upon installation it is necessary to arrange after and near the equipment a main switch for an omnipolar cut-off with contact minimum opening of 3 mm. For cleaning the instrument make use of a cloth slightly soaked in pure alcohol for both the container and the display.

  • Page 14: Warnings For The Installation Of Load Cells And Microprocessor Systems

    2.4 - WARNINGS FOR THE INSTALLATION OF LOAD CELLS AND MICROPROCESSOR SYSTEMS 1. Do not carry out weldings with load cells fitted. 2. Use a copper conductor to connect the load upper support plate with the lower one, then connect both upper plates with the earth line. 3.

  • Page 15: Electric Connections

    2.5 - ELECTRIC CONNECTIONS Only qualified personnel shall carry out the procedures described below. All connections shall be made with instrument OFF. TERMINAL BLOCKS DIAGRAM UPPER TERMINAL BLOCK LOWER TERMINAL BLOCK 2.6 - LOAD CELL CONNECTION (CONTACTS 1÷6 LOWER TERMINAL BLOCK) The cell cable shall not be inserted together with other cables (for eg.

  • Page 16: Logic Inputs And Outputs (Contacts 5÷18 Lower Terminal Block)

    6 WIRES CELL CONNECTION Lower terminal block - Signal NUM. (pitch 5.08 mm) + EXC + Sense + Signal - Sense - EXC + Sense 4 WIRES CELL CONNECTION - Sense - Signal + EXC Signal + Sense Signal + Signal - Sense - EXC Note: to use the 4-wire technique, jumper across terminal 38 and terminal 37, terminal 39 and...
  • Page 17 Run static input. Close this contact to enable instrument begin and maintain programmed operations (weighing, flow regulation, alarms etc.). Input must be kept closed during dosing; open the contact to stop operations. Manual selection (open) / automatic (closed). The selection through the touch screen has the priority over the selec- tion of this input.

  • Page 18: Instrument Power Supply (Contacts 23-24, Lower Terminal Block)

    2.8 - INSTRUMENT POWER SUPPLY (CONTACTS 23-24, LOWER TERMINAL BLOCK) The instrument is powered through terminals 23 and 24. The power cable must be routed separately from other cables with different voltages, load cell cables, encoder cables, and logical/analog input/output cables. Lower terminal block NUM.

  • Page 19: Rs232 Serial Port (Contacts 27÷29, Side Terminal Block)

    2.11 - RS232 SERIAL PORT (CONTACTS 27÷29, SIDE TERMINAL BLOCK) To establish the serial connection, use a shielded cable, ensuring that the shield is grounded on one end only. If the cable has more conductors than needed, connect the unused conductors to the shield.

  • Page 20: Analogue Outputs (Contacts 1÷4 Upper Terminal Block) (2Nd Output Optional)

    2.15 - ANALOGUE OUTPUTS (CONTACTS 1÷4 UPPER TERMINAL BLOCK) (2ND OUTPUT OPTIONAL) The instrument, when in this hardware configuration, provides two opto-isolated analog outputs in current and voltage. NOTE: The standard configuration is made in the laboratory. Characteristics: • For analog voltage output jumpers JP2 (Ana1) and JP7 (Ana2) to the RIGHT: range from 0 to 10 Volts or from 0 to 5 Volts.

  • Page 21: Optional Analogue Input (Contacts 34-35 Lower Terminal Block)

    2.16 - OPTIONAL ANALOGUE INPUT (CONTACTS 34-35 LOWER TERMINAL BLOCK) Optionally, it is possible to have an analog input with a measuring range of 0-5V, 0-10V, 0-20mA, 4-20 mA. The measuring range must be chosen when ordering and cannot be selected on the instrument. The ADC resolution is 24 bit.
  • Page 22 - The RJ45 ethernet connection cable has a variable maximum length, depending on the type of cable. A common shielded Cat5 cable can have a maximum length of approximately 180 m. - It is possible to connect the Ethernet communication port directly to the PC, without going through other network devices (router, switch, hub, lan-bridge or other), but special RJ45 cables, called “crossover”, must be used.

  • Page 23: Structure And Parameter Navigation Mc755

    3 - STRUCTURE AND PARAMETER NAVIGATION MC755 3.1 - ELECTRONIC START-UP When powered on, the display temporarily shows an introductory screen indicating the firmware code and version. Firmware Code: It is important to communicate the firmware code when requesting information or guidance about the instrument.

  • Page 24: Access Method To The Setup Menu

    3.3 - ACCESS METHOD TO THE SETUP MENU By pressing the “Setup Menu Touch Button”, you access the programming of the weighing system parameters. There are 4 options available: Info - Test - User - Technician. This button provides access to the programming menu.

  • Page 25: Total Quadrant

    3.5 - TOTAL QUADRANT In the general screen, pressing the “Total” quadrant opens a detailed screen where additional information is displayed.  Setpoint, the total transported weight. When the total reaches this value, the cor- responding output is activated. When the remaining value to reach the Preset setpoint is less than this, the corresponding output is activated.

  • Page 26: Flow Rate Quadrant

    3.7 - FLOW RATE QUADRANT In the general screen, pressing the Flow Rate quadrant opens the detailed screen for instantaneous flow rate, where additional information is displayed.  TECHNICAL NOTE: GRAPHICAL REPRESENTATION OF THE FLOW RATE The graph represents 300 values, one value per second over 5 minutes, regardless of the sampling time.

  • Page 27: Dial 6: Current Weight

    3.9 - DIAL 6: CURRENT WEIGHT This dial displays the current detected weight. In case of load cells not connected or faulty connection cable, the mes- sage NO CONN is displayed instead of the measurement. If the weight is not calibrated, the flashing message NO CAL is displayed instead of the weight; the various serial protocols and the drive are also inhibited.

  • Page 28: Mc755 Menu Programming Levels

    3.11 - MC755 MENU PROGRAMMING LEVELS The programmable parameters are organized in 3 different levels: User, Technician and Setup. A programmable password can be enabled for each level to access the menu. Modifying the parameters could compromise the operation of the machine, therefore it is recommended to do so only if you are an expert and in any case after having read the manual.

  • Page 29: Touch Screen Programming Menu - Programming Level Protection

    4 - SYSTEM MENU - (ACCESS ONLY IF EXPERT) Contains the instrument configuration functions/parameters, the modification of these parameters is nor- mally carried out during the indicator production phase This button allows access to the System Setup menu. A long press of at least 3 seconds is required. This button allows you to choose the menu with the modifiable parameters 4.1 - TOUCH SCREEN PROGRAMMING MENU - PROGRAMMING LEVEL PROTECTION Each level can be associated with a protection password, programmable from the technical menu, which...

  • Page 30: Parameter Navigation Tables

    4.2 - PARAMETER NAVIGATION TABLES SETUP MENU Access from the main screen by holding down the MENU button for 3 seconds. Programmable password (default = 2286) Submenu Parameter / Function Unit Description Operation Select TOTALIZER / REGULATOR Totalization Select NO/YES Calibrations Selection 0-10V, 0-5V, 0-20mA, 4-20mA Master Input...

  • Page 31: User Section

    4.3 - USER SECTION Programmable password (default = 166) Submenu Parameter / Function Unit Notes Sample Time From 3 to 120 sec for flow rate calculation (10Hz calculation if t<=20, 5 if 20<t<=40, 2.5 if 40<t<=80, 1.25 if t >80) Proportional Const.

  • Page 32: Technical Section

    4.4 - TECHNICAL SECTION Programmable password (default = 1599) Submenu Parameter / Function Unit Description Weight Unit Selection kg, g, t. Cell Capacity <weight From 1 to 100000 unit> System Calibration <weight Selection from 0.001 to 50 unit> Cell Sensitivity mV/V Used for automatic theoretical calibration Preload...
  • Page 33 Com1 – Rs232 Access to the relevant parameter setting submenu Com2 - Rs232 Access to the relevant parameter setting submenu Com3 - Rs485 Access to the relevant parameter setting submenu Comm. Doors Com4 – Rs485 Access to the relevant parameter setting submenu Ethernet Access to the relevant parameter setting...

  • Page 34: Technical Note: Regulation Parameters

    5 - TECHNICAL NOTE: REGULATION PARAMETERS - Sampling time: The time considered for calculating the instantaneous flow rate. The instanta- neous flow rate is calculated by interpolating the latest weight data sampled during this time using the least squares method to determine the trend line representing the instantaneous flow rate. With a higher sampling time, the flow rate appears more filtered.

  • Page 35: Technical Note: Variable Filters

    5.2 - TECHNICAL NOTE: VARIABLE FILTERS -Flow filter: This parameter allows you to manually set the number of elements used for the arithmetic mean applied to the Hourly Flow value. -Weight Filter: This parameter allows you to manually set the number of elements used for the arithmetic mean applied to the weight value.

  • Page 36: Technical Note: Method Of Refilling The Doser

    5.6 - TECHNICAL NOTE: METHOD OF REFILLING THE DOSER Recharge operation selection is performed with parameter 40161. SINGLE: recharge is performed with a single operation even if the max level is not reached, as long as the recharge input remains closed; MAX LEVEL: recharge can be performed in multiple phases and ends only when the max weight level is reached;...

  • Page 37: Technical Note: Data Logger

    5.10 - TECHNICAL NOTE: DATA LOGGER The datalogger function allows you to record the records with the main system data on the USB stick connected to the USB Host port, in a ..\Log\logxxxx.csv file The function can be selected: “SINGLE” with manual storage of a record with the appropriate button on the main scre- “CONTINUOUS”...

  • Page 38: Technical Note: Manual Output Associated With The Set Point

    5.13 - TECHNICAL NOTE: MANUAL OUTPUT ASSOCIATED WITH THE SET POINT Each setpoint is associated with a manual control output percentage. • When a setpoint value is programmed or modified, an associated manual output value is proposed, calculated proportionally to the full scale value and corrected based on the values stored in the doser calibration procedure;...

  • Page 39: In-Out Test Procedures

    5.15 - IN-OUT TEST PROCEDURES This procedure allows you to view the status of the logical inputs and outputs, and force the status of the outputs by acting on the touch screen Return to top menu Input 1 enabled Enable output 3 5.16 - SIMULATION PROCEDURE In the simulation procedure, the current weight is acquired by the load cells.

  • Page 40: Weight Calibration Procedure

    6 - WEIGHT CALIBRATION PROCEDURE After programming the following parameters, in the doser specifications menu: - Weight unit - Cell capacity - Weight division value - Cell sensitivity You can proceed to perform an automatic calibration of the weighing system. Select the “TECHNICAL”...

  • Page 41: Doser Calibration Procedure

    6.3 - DOSER CALIBRATION PROCEDURE This procedure calibrates the regulation output. The procedure involves carrying out a test at a constant manual speed by weighing the unloaded material on a sample scale. Before carrying out the test, it is necessary to reset the General Total. Once the test is complete, select the “SYSTEM CALIBRATION”...

  • Page 42: Doser Calibration Procedure

    6.3 - DOSER CALIBRATION PROCEDURE This procedure calibrates the regulation output at different speeds, so as to better refine the operation of the doser. The procedure involves performing several tests at a constant manual speed with the weighing of the un- loaded material on a sample scale.

  • Page 43: Communication Ports

    6.4 - COMMUNICATION PORTS The MC755 weight indicator has - N° 2 Rs232 serial ports - N° 2 Rs485 serial ports - N° 1 Ethernet (LAN) - N° 1 USB Host for pen drive N° 1 USB Device - N° 1 optional Fieldbus interface: Profinet, Ethernet-IP. ----------------------- - The serial ports Com.

  • Page 44: Serial Repeater Protocol

    7 - SERIAL REPEATER PROTOCOL The communication string is sent at a frequency of 5 Hz. PPPPPPPP TTTTTTTT ETX CC M (1 char.): Dosing status (‘1’ in dosing; ‘0’ in stop) F (1 char.): Operation (‘M’ manual; ‘A’ automatic) PPPPPPPP (8 char.): Hourly flow rate TTTTTTTT (8 char.): Total CC (2 char.): Checksum 7.1 - ASCII SERIAL PROTOCOL...

  • Page 45: Controls

    7.2 - CONTROLS The commands are available in any condition the instrument is in except for the A,D,F,J,N,P,T,U commands during keyboard programming of the related parameters. COMMUNICATION STRING FORMAT All strings passed to the instrument have the following format; the instrument response strings also have the same format except the error string, the command not available string and the acknoledgy string.- String type ADDR...
  • Page 46   E) SET TOLERANCE READING   The PC transmits: ADDR “E” ETX <CC> EOT The instrument responds: ADDR “E” <XXXX> ETX <CC> EOT <XXXX> = set tolerance without decimal point F) PROGRAMMING SET OF TOTAL DOSED, PRESET AND FLIGHT The PC transmits: ADDR “F” <XXXXXXX> <PPPPPPP> <VVVVVVV> ETX <CC> EOT <XXXXXXX>...
  • Page 47 I) MANUAL / AUTOMATIC SELECTION   The PC transmits: ADDR “I” <N> <XXX> ETX <CC> EOT <N> = (“A” = automatic, “M” = manual) <XXX> = manual output value (from 0% to 100%) - with <N> = “A” : <XXX> = ”000” - with <N>...
  • Page 48 L) READING INSTRUMENT STATUS   The PC transmits: ADDR “L” ETX <CC> EOT The instrument responds: ADDR “L” <M> <F> <FFFF><PPPPPP><XXXXXXX> ETX <CC> EOT <M> = (stop=’0’ , start=’1’ , dosing=’2’ , refill=’3’ , end of refill=’4’ , volumetric block=’5’) <F>...
  • Page 49 P) LINEARIZATION POINTS PROGRAMMING The PC transmits: ADDR “P” <aaaa><bbbb><cccc><dddd><eeee><ffff><gggg> ETX <CC> EOT <aaaa> = flow rate corresponding to 20% of the output. <bbbb> = flow rate corresponding to 30% of the output. <cccc> = flow rate corresponding to 40% of the output. <dddd>...
  • Page 50 S) INSTANT ANALOG OUTPUT PERCENTAGE READING   The PC transmits: ADDR “S” ETX <CC> EOT The instrument responds: ADDR “S” <XXX> ETX <CC> EOT <XXX> = 3 characters of instantaneous analog output percentage   T) RESETTING LINEARIZATION POINTS   PC transmits: ADDR “T” ETX <CC> EOT Instrument responds: ADDR “T”...

  • Page 51: Modbus Rtu / Modbus Tcp Table

    8 - MODBUS RTU / MODBUS TCP TABLE The following table lists the instrument registers that can be read or programmed via Modbus RTU or Modbus/TCP protocol. The supported functions are: READ HOLDING REG PRESET SINGLE REG PRESET MULTIPLE REG Registers are 16 bits in size.
  • Page 52 40123 Setup Password 40124 Technician Password 40131 Cal.Dos-Flow Rate @ 20% 40132 Cal.Dos-Flow Rate @ 30% 40133 Cal.Dos-Flow Rate @ 40% 40134 Cal.Dos-Flow Rate @ 50% 40135 Cal.Dos-Flow Rate @ 60% 40136 Cal.Dos-Flow @ 70% 40137 Cal.Dos-Flow @ 80% 40151 Technical - Max Flow 40152 Technical - Max Flow...
  • Page 53 41027 Disable Tolerance Alarm 41028 Disable Tolerance Alarm All. Regulation 41029 Permanent alarm activation 41041 Start delay 41042 Stop delay 41043 Recharge timeout 41044 Tolerance delay 41045 Start tolerance delay 41061 Flow filter 41062 Weight filter 41063 Minimum flow 41064 Minimum regulation output 41065 Setpoint filter...
  • Page 54 42063 Setpoint 12 42064 Manual output setpoint 12 42065 Setpoint 13 42066 Manual output setpoint 13 42067 Setpoint 14 42068 Manual output setpoint 14 42069 Setpoint 15 42070 Manual output setpoint 15 43011 Hourly flow rate 43012 Total 43013 Total 43014 Grand Total 43015...

  • Page 55: Master / Slave Protocol

    8.1 - MASTER / SLAVE PROTOCOL The instrument can be configured to work as a master of other instruments or as a slave of it. In the first case the percentage of hourly flow detected with respect to the full scale is continuously transmitted to the slaves, which adjust the flow setpoint to the percentage received.

  • Page 56: Profinet - Ethernet/Ip

    8.2 - PROFINET - ETHERNET/IP The management of fieldbus protocols takes place via dedicated interfaces (hardware modules mounted internally). FIELDBUS INTERFACE MANAGEMENT Communication between the instrument and the fieldbus interface occurs via Modbus RTU serial protocol. The communication baud rate is fixed (115200 bits/sec). The timeout on the module response is controlled (300 ms).

  • Page 57: Input Data Area

    8.3 - INPUT DATA AREA - Data produced by the instrument and master read Input area size: selectable (32, 64, 96 or 128 bytes). Single register size: 16 bits. Register update rate: 100 Hz. - Data written by the master and acquired by the instrument Output area size: selectable (32, 64, 96 or 128 bytes).
  • Page 58 2002 Total Set (LSW) 42-43 2003 Total Preset (MSW) 44-45 2004 Total Preset (LSW) 46-47 2005 Total Queue (MSW) 48-49 2006 Total Queue (LSW) 50-51 1021 Total Pulse Value 52-53 1005 Setpoint Tolerance 54-55 1044 Tolerance Alarm Delay 56-57 3029 Hourly Flow Decimals 58-59 3031...
  • Page 59 1001 Sampling time 114-115 1002 Proportional constant 116-117 1003 Flow sensitivity 118-119 1004 Dead band 120-121 1061 Hourly flow filter 122-123 1062 Weight filter 124-125 1063 Minimum flow 126-127 Page 59...

  • Page 60: Output Data Area Table

    8.5 - OUTPUT DATA AREA TABLE Address ref. Variables Byte Mapping Command Register Data Register (MSW) Data Register (LSW) 7001 Monitor Register 4012 AUTO / MAN Operation 4013 Manual Output Value 10-11 4011 Active Setpoint Number 12-13 2001 Total Set (MSW) 14-15 2002 Total Set (LSW)
  • Page 61 2056 Output relative to Setpoint 8 62-63 0151 Maximum system flow rate (MSW) 64-65 0152 Maximum system flow rate (LSW) 66-67 0153 Load cell flow rate (MSW) 68-69 0154 Load cell flow rate (LSW) 70-71 0155 Minimum weight level (MSW) 72-73 0156 Minimum weight level (LSW)
  • Page 62 PAVONE SISTEMI S.R.L. Via Tiberio Bianchi, 11/13/15, 20863 Concorezzo (MB) T 039 9162656 F 039 9162675 W en.pavonesistemi.it Industrial Electronic Weighing Systems since 1963...