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Zener MSC-3 Instruction Manual

Ac variable speed controller
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MSC-3
Extended Features
Option
Instruction Manual
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ZENER

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Summary of Contents for Zener MSC-3

  • Page 1 MSC-3 Extended Features Option Instruction Manual ZENER...
  • Page 2 SAFETY Your MSC-3 must be applied, installed and operated in a safe manner. It is the responsibility of the user to ensure compliance with all regulations and practices covering the installation and wiring of your MSC-3.
  • Page 3 MSC-3 Extended Features Option Manual ZENER Contents Explanation of symbols ..........................1 Warnings ..............................1 Receiving ..............................2 Firmware ..............................2 MSC-3 Extended Features Option Description ..................3 Thermal protection input ........................3 Analog input ............................3 Transducer Power Supply ........................3 Analog output .............................3 Digital inputs ............................3 Relay Output .............................3 User and Preset speed reference selection ..................3...
  • Page 4 Application: Cooling tower fan with reverse acting internal PID ............29 Application: Water pumping with automatic pressure control ............29 Application: Constant Pressure Water Pumping ..................30 Your MSC-3 Extended Features Option Setup Notes ................32 Specifications ............................33 Thermal Protection ...........................33 Analog input .............................33 Tranducer Power Supply ........................33...

  • Page 5: Explanation Of Symbols

    The MSC-3 contains high energy circuits that may be hazardous. Do not operate the MSC-3 with the door open or any part of the enclosure removed. Do not touch the terminals of the MSC-3 or any associated motor and wiring when it is energised, even if the MSC-3 and motor are stopped. Electric shock may result.

  • Page 6: Receiving

    MSC-3 Extended Features Option Manual ZENER The MSC-3 contains a substantial EMC line filter and as a result it is unsuitable for use on earth leakage protected circuits. Mount the MSC-3 on a vertical, incombustible surface such as metal or masonry. Do not place combustible or flammable material near the MSC-3.

  • Page 7: Msc-3 Extended Features Option Description

    The thermal protection input requires no user set up and is active at all times except when MSC-3 is operating in the Essential Services Override (ESO) mode.

  • Page 8: Installation

    Once control wiring is complete replace the bottom moulding. When the MSC-3 is switched on, restore defaults for each new option fitted or existing options that occupy an alternate connector. Refer to the J00 OPN DEFAULTS section on page 13 of this manual for details.
  • Page 9 MSC-3 Extended Features Option Manual ZENER Several different screw types are used. take care to replace all screws in their original locations. Display Assembly Control Board Extended Features Option Insulation Sheet Bottom section - blue plastic moulding. IP30 Chassis A Installation...
  • Page 10 MSC-3 Extended Features Option Manual ZENER Several different screw types are used. take care to replace all screws in their original locations. Display Assembly In some models this is attached by screws. Control Board Extended Features Option Insulation Sheet MSC-3 Chassis...

  • Page 11: Installation

    Once control wiring is complete close the front door. When the MSC-3 is switched on, restore defaults for each new option fitted or existing options that occupy an alternate connector. Refer to the J00 OPN DEFAULTS section on page 13 of this manual for details.
  • Page 12 MSC-3 Extended Features Option Manual ZENER Intentionally blank IM00087B...

  • Page 13: Extended Features Option Menus

    The menus of the MSC-3 are extended when Extended Features Options are fitted. The extensions are the additional features that the option brings to the MSC-3. As there may be two of the same Extended Features Options fitted, duplication of features occurs.

  • Page 14: Control Console Menu

    MSC-3 Extended Features Option Manual ZENER Control Console Menu The following pages show the structure of the control console menu. V01 Hz* A00 DISPLAY V02 RPM A01 RUN VARIABLE V03 %Load V04 Amps A02 RUN SCALE V05 Volts DC V06 kW...
  • Page 15 MSC-3 Extended Features Option Manual ZENER F00 REFERENCES F01 REMOTE R00 AN1 F02 LOCAL R01 REF AT 0% F03 ESO R02 REF AT 100% F03 ESO R03 PRESET % F06 ESO RAMP R04 MOTORISED POT F04 JOGFWD R05 PERSISTENT F05 JOGREV...
  • Page 16 MSC-3 Extended Features Option Manual ZENER Additional menu items will appear here if another option board is fitted. A00 DISPLAY Loops back to start of menu IM00087B...

  • Page 17: Option Defaults

    Several settings contribute to the analog output configuration. They are P01 Analog Opt, P02 Zero opt %, P03 Max opt %. and P04 Min opt %. The MSC-3 will display the present settings each time the analog output menu is entered. The following graph shows how these values affect output scaling...

  • Page 18: P01 Analog Opt

    For example, with V02 rpm as the chosen signal, a 4 to 20mA output is required for the speed range. Set P02 Zero opt % to -25% and P03 Max opt % to 100%. See MSC-3 output current specification in the MSC-3 Instruction Manual. Based on a Power Factor of 0.85.

  • Page 19: Analog Output Setup Checklist

    MSC-3 Extended Features Option Manual ZENER P03 Max opt % Default value: 100% Menu location: The P01 Analog Opt menu Range: -1000 to 1000% of chosen signal This value specifies the percentage of the chosen signal that will produce maximum output at the analog output terminals.

  • Page 20: Extended Features Option References

    -100 % to +100 % of the Process variable range if used for the PID set point. The preset speeds provide extra speed references for the MSC-3. When a preset is selected it is adjusted using the console Up and Down push buttons. Setting a negative preset value will specify a reverse speed reference provided reverse operation has been enabled and the FWD and REV inputs are wired to +5V.

  • Page 21: Reference Selector

    MSC-3 Extended Features Option Manual ZENER Reference Selector P14 Ref Select Menu location: F00 References and P05 Option Refs (see page 11) Three digital inputs i.e. P15 Selector 1, P16 Selector 2 and P17 Selector 3 are used to define the active reference of P14 Ref Select according to the logic table below.

  • Page 22: Extended Features Option Digital Inputs

    MSC-3 Extended Features Option Manual ZENER Extended Features Option Digital Inputs P18 OP DIG IN 1 Default value: P15 Selector 1 P19 OP DIG IN 2 Default value: P16 Selector 2 P20 OP DIG IN 3 Default value: P17 Selector 3...

  • Page 23: P22 Analog Input

    MSC-3 Extended Features Option Manual ZENER P22 Analog input Menu location: Reference selection list (F00 References see page 11) The analog input of the Extended Features Option requires two parameters to rescale the reference. They are P23 Ref at 0% and P24 Ref at 100%. Each time the P22 Analog input is selected in the menu, each value may be checked or adjusted as needed.
  • Page 24 MSC-3 Extended Features Option Manual ZENER Examples of some analog input scaling: Rescaled Rescaled Reference Reference Signal Signal P22 Ref at 0% = 100% P23 Ref at 100% = 100% P22 Ref at 100% = 0% Input Input Signal Signal...

  • Page 25: Analog Input Scaling

    MSC-3 Extended Features Option Manual ZENER Analog Input Scaling To calculate the values for REF AT 0% and REF AT 100% you need to know the following: • Two analog input values and the speed required at each value • The maximum speed.

  • Page 26: Pid Controller

    MSC-3 Extended Features Option Manual ZENER PID CONTROLLER The PID controller of the MSC-3 include the following features: • Adjustable Integrator anti-windup • Adjustable Output saturation with anti-windup • Open loop to closed loop initialization • Selectable set point and feed forward input signals •...

  • Page 27: Pid Menu Structure

    Menu location: Reference selection list (F00 References see page 11) Selecting the P38 PID output as the speed reference will connect the PID controller to the MSC-3 speed controller. The PID controller uses the standard features of the MSC-3 as its output stage that provides the necessary power to drive the process.

  • Page 28: Pid Run Variable

    P38 PID Output Menu location: Run Variable selection list When the P38 PID Output is the selected run variable, the displayed information is different from regular MSC-3 operation. The table below indicates the operational differences. Mode Standard MSC-3 Display PID controller display Top Line Run variable (speed, load, etc).

  • Page 29: Extended Features Option Digital Output

    None Indicates the presence of a trip that has stopped the output of O01 TRIP None the drive Indicates that the MSC-3 is in the essential services mode. O02 ESO None See page 46 of the MSC-3 manual. O03 PROOF Indicates that the MSC-3 is enabled and not tripped.

  • Page 30: Pid Control Wiring

    MSC-3 Extended Features Option Manual ZENER PID Control Wiring MSC-3 CONTROL BOARD Vref � NO POWER POWER ON AND STOPPED STOP/ POWER ON AND RESET DRIVE RUNNING RL1 - RUN 1K TO 10K POT FOR DEFAULT PID LOCAL REMOTE SET POINT...

  • Page 31: Setup Checklist And Tuning

    ZENER Setup Checklist and Tuning Control Wiring (Assumes factory defaults are loaded) All wiring must be done while the MSC-3 is disconnected from the power supply. Refer to the Control Wiring Diagram for details 1.1. Wire in the transducer that measures the process variable (PV) to the analog input of the Extended Features Option.
  • Page 32 MSC-3 Extended Features Option Manual ZENER PID Tuning Summary: Problem Remedy In open loop the PV does not match Check the transducer signal and check the analog input settings the desired operating point of the P22 Analog input menu. In closed loop operation the system Increase the P26 PB (%) or decrease the P28 Td (sec).

  • Page 33: Application Examples

    Application: Cooling tower fan with reverse acting internal PID See page 33 of the MSC-3 manual. This setup is for a typical cooling tower fan application that requires water temperature control using a water temperature transducer and the PID controller function provided by the MSC-3 extended features option board.

  • Page 34: Application: Constant Pressure Water Pumping

    Prior to commissioning, you will need to know the type of water pressure transducer signal that is to be used (0-10V,4-20mA etc). Procedure STEP 1 Complete the power wiring according to the instructions on pages 7 to 15 of the MSC-3 Instruction Manual STEP 2 Connect the control wiring as shown on page 27.
  • Page 35 MSC-3 Extended Features Option Manual ZENER Application: Constant Pressure Water Pumping MSC-3 CONTROL BOARD Vref NO POWER POWER ON AND STOPPED STOP/ POWER ON AND RESET DRIVE RUNNING RL1 - RUN NO POWER POWER ON AND STOPPED POWER ON AND...

  • Page 36: Your Msc-3 Extended Features Option Setup Notes

    MSC-3 Extended Features Option Manual ZENER Your MSC-3 Extended Features Option Setup Notes Photocopy this page or complete in pencil Site Designator ..........................MSC-3 Serial No............User Parameters Date......User Default User Default ANALOG OUTPUT PID CONTROLLER P01 Analog Opt...

  • Page 37: Specifications

    • IN+ (terminal 9) / IN- (terminal 10) • Differential input configurable as either: 0 to 5V; 0 to 10V; 0 to 20mA; 4 to 20mA • Common mode range: +/- 25Vdc to AN COM of the MSC-3 control board Tranducer Power Supply •...

  • Page 38: Pid Specifications

    MSC-3 Extended Features Option Manual ZENER PID Specifications Display • LCD back-lit display • Display of set point and process variables • Custom units and display scaling • Clamp indication messages PID Inputs • Choice of any available reference for set point, process variables and feed forward inputs including presets and analogue inputs (0-5V, 0-10V, 4-20mA) •...

  • Page 39: Glossary

    PID maintains the tension. Display Scaling The MSC-3 allows the SV and PV values to be rescaled to display with meaningful values. For example a pressure chamber is operated at full motor speed and the feed back transducer produces an electrical signal that corresponds to 200.0 kPa.

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