Watlow CAS Manual de usuario

CASUser ’s Guide Part No. 21952-60. Revision 1.2February 1996Watlow Controls1241 Bundy Blvd.Winona, MN 55987Customer ServicePhone: (800) 414-4299Fax:

viii CAS User’s Guide

IntroductionCAS User’s Guide 1IntroductionThe CAS is a modular monitoring system with 16 fully independentinputs. It can function as a stand-alone sys

2 CAS User’s GuideIntroduction Front Panel or Computer Operation: Set up and run the CAS fromthe front panel or from a local or remote compute

IntroductionCAS User’s Guide 3SpecificationsThis section contains specifications for inputs, serial interface, systempower requirements, environmental

4 CAS User’s GuideIntroduction Voltage inputs: 0-12V, 0-10V, 0-5V, 0-1V, 0-500mV, 0-100 mV withscaling resistors.Source Impedance: for 0-60 mV

IntroductionCAS User’s Guide 5Miscellaneous SpecificationsSerial InterfaceType: RS-232 3 wire or RS-485 4 wire.Isolation: RS-232 NoneRS-485 To EIA RS-

6 CAS User’s GuideIntroduction

InstallationCAS User’s Guide 7InstallationThese installation instructions are written for non-technical users; if youare an electrician or you are tec

8 CAS User’s GuideInstallation Precautions and WarningsDANGERShut off power to your process before you install the CAS. Highvoltage may be pre

InstallationCAS User’s Guide 9Recommended ToolsUse these tools to install the CAS:Panel Hole CuttersUse any of the following tools to cut a hole of th

Copyright © 1996Watlow AnafazeInformation in this manual is subject to change without notice. No part of this publication may bereproduced, stored in

10 CAS User’s GuideInstallation CAS Mounting ProcedureNOTEMount the monitor before you mount the TB-50 or do any wiring.The monitor's pla

InstallationCAS User’s Guide 11TB-50 Mounting InstructionsTo connect alarms to the CAS System, wire them to the TB-50 (50-pinterminal block). These st

12 CAS User’s GuideInstallation 1. Place the TB-50 where you will mount it and use a pencil to trace around the standoffs.2. Drill and tap #6-

InstallationCAS User’s Guide 13General Wiring RecommendationsUse the cables below or their equivalent. For best results, useappropriate materials, pro

14 CAS User’s GuideInstallation GroundingConnect the CAS power supply common to an external ground at onlyone point, to avoid ground loops tha

InstallationCAS User’s Guide 15Communications WiringLarge systems can pull an extra pair of wires to the computercommunications wiring. The extra pair

16 CAS User’s GuideInstallation Wiring: Noise SuppressionIf the outputs control dry contact electromechanical relays withinductive loads, like

InstallationCAS User’s Guide 17General WiringThis section explains how to test your installation before you connectpower to it and how to connect inpu

18 CAS User’s GuideInstallation WARNINGDo not turn on AC power yet. First test the connections, asexplained in the Connections Test section (b

InstallationCAS User’s Guide 19OutputsNOTEAll digital outputs are sink outputs referenced to the 5Vdc supply.These outputs are low (pulled to common)

Contents CAS User’s Guide iContentsIntroduction...1CAS Features ...

20 CAS User’s GuideInstallation Using the Cable Tie WrapsWhen you have wired outputs to the TB-50, use the cable tie wrapsshipped with it. Thi

InstallationCAS User’s Guide 21Alarm Output ConnectionsTypical digital outputs use external optically isolated solid-state relays(SSRs). The SSRs use

22 CAS User’s GuideInstallation TB-50 ConnectionsThis table shows TB-50 connections.Pin Function Pin Function1 +5 Vdc 2 +5 Vdc3 Digital Ground

InstallationCAS User’s Guide 23InputsThis section covers input scaling and input installation for all inputtypes, including thermocouples, current inp

24 CAS User’s GuideInstallation Scaling ValuesFor linear mVdc, Vdc, and mAdc ranges, use 0.1% tolerance resistors.Larger tolerances may cause

InstallationCAS User’s Guide 25The next table shows the location of RC and RD on the analog inputboard. (The analog input board is the upper board of

26 CAS User’s GuideInstallation T/C InputsWARNINGSince the CAS has single ended inputs, it has little protectectionfrom common mode voltage so

InstallationCAS User’s Guide 27Voltage Inputs• Connect the + side of the voltage input to the In+ terminal. • Connect the - side of the input to analo

28 CAS User’s GuideInstallation Serial CommunicationsThe CAS is factory-configured for RS-232 communications. However,the communications are j

InstallationCAS User’s Guide 29Wire equipment in a single "daisy chain" using twisted shielded pairsfor the RS-485 cables. Don't use &q

Contentsii CAS User’s GuideT/C Inputs ... 26Current Inputs ...

30 CAS User’s GuideInstallation Configuring CommunicationsYour system is shipped configured for RS-232. To switch between RS-232 and RS-485, c

InstallationCAS User’s Guide 31Recommended Wire GaugesWatlow Anafaze recommends the following maximum distances andwire gauges:You may wish to use a s

32 CAS User’s GuideInstallation

Using the CASCAS User’s Guide 33Using the CASIntroduction This chapter will show you how to use the CAS from the front panel. (Ifyou are using ANASCAN

34 CAS User’s GuideUsing the CAS Front PanelThe front panel provides a convenient interface with the CAS system.You can program and operate th

Using the CASCAS User’s Guide 35The Back key works like an "escape" key. Press it to:• Abort editing.• Return to a previous menu.• Switch be

36 CAS User’s GuideUsing the CAS Single Channel DisplaySingle Channel display (below) shows detailed information for onechannel. From Single

Using the CASCAS User’s Guide 37Job DisplayJob display appears only if:• You have turned on the Remote Job Select function. (This function is explaine

38 CAS User’s GuideUsing the CAS Change SetpointTo change the setpoint, go to the Single Channel Display of the channelyou want to change, and

Using the CASCAS User’s Guide 39AlarmsIf an alarm occurs, an eight character alarm code is displayed in thelower-right section of the display. If a Fa

Contents CAS User’s Guide iiiDisplay Format ... 54High Process Value...

40 CAS User’s GuideUsing the CAS

SetupCAS User’s Guide 41SetupThe Setup menus let you change detailed configuration information. How to Enter the Setup Menus1. In Single Channel Displ

42 CAS User’s GuideSetup CAS Menus

SetupCAS User’s Guide 43Setup Global Parameters MenuThe setup global parameters menu looks like this.Load a JobSelectable values: 1 to 8The following

44 CAS User’s GuideSetup Save Setup to JobUse this menu to save job information for every channel, to one of eightjobs in the CAS battery-back

SetupCAS User’s Guide 45Selectable values: 1, 2, or 3 inputs, or None. These choices have thefollowing effect:Job Select Input PolarityThis menu lets

46 CAS User’s GuideSetup Keyboard Lock StatusThis selection lets you lock the front panel operator function key,Change SP, so that pressing th

SetupCAS User’s Guide 47Communications Baud RateThis menu allows you to set the Communications Baud Rate. If usingAnascan, ensure that that program ha

48 CAS User’s GuideSetup Digital Output PolarityThis menu lets you set the polarity of the digital outputs used for alarms. Selectable values

SetupCAS User’s Guide 49Setup Channel InputsThe Setup Channel Input main menu lets you access menus whichchange parameters related to the channel inpu

Contentsiv CAS User’s Guide

50 CAS User’s GuideSetup Selectable values: The table shows the input types and ranges.Pulse Sample TimeYou can connect a digital pulse signal

SetupCAS User’s Guide 51Input UnitsThe Input Units menu lets you choose a three-character description ofthe channel's engineering units. • Thermo

52 CAS User’s GuideSetup Linear Scaling MenusThe linear scaling menus appear under the Setup Channel Inputs mainmenu. Linear scaling is availa

SetupCAS User’s Guide 53The PV (Process Variable) range for the scaled input is between the PVvalues that correspond to the 0% and 100% input readings

54 CAS User’s GuideSetup Display Format This menu lets you select a display format for a linear or pulse input.Choose a format appropriate for

SetupCAS User’s Guide 55High ReadingUse this menu to enter the input level that corresponds to the highprocess value you entered in the previous menu.

56 CAS User’s GuideSetup Low ReadingThis menu appears under the Setup Channel Inputs main menu. Use it toenter the input level that correspond

SetupCAS User’s Guide 57Setup Channel AlarmsThe Setup Channel Alarms menu lets you access menus which changealarm function parameters for the current

58 CAS User’s GuideSetup • High process and high deviation alarms activate when the process variable goes above a value you set. They remain a

SetupCAS User’s Guide 59Alarm DelayYou can set the CAS to delay normal alarm detection and alarmreporting. There are two kinds of alarm delay:• Startu

CAS User’s Guide vOverviewThis manual describes how to install, setup, and operate a CAS.Included are six chapters and a glossary of terms. Each chapt

60 CAS User’s GuideSetup High Process Alarm Output NumberThis menu lets you choose the digital output that activates when thechannel is in hig

SetupCAS User’s Guide 61High Deviation Alarm Output NumberThis menu assigns a digital output which activates when the channel isin high deviation alar

62 CAS User’s GuideSetup Low Deviation Alarm Output NumberThis menu is used to assign a digital output that activates when thechannel is in lo

SetupCAS User’s Guide 63Low Process Alarm Output NumberThis menu lets you assign the digital output that activates when thechannel is in low process

64 CAS User’s GuideSetup Alarm DelayThis menu sets a channel alarm delay. There are two types of alarmdelay: the startup alarm delay and chann

SetupCAS User’s Guide 65Manual I/O TestPress Ye s at this prompt to see menus which can help you test the digitalinputs, digital outputs and the CAS&a

66 CAS User’s GuideSetup Digital Output TestThis menu lets you manually toggle a digital output On or Off to test it.(Select the output to tes

TroubleshootingCAS User’s Guide 67TroubleshootingThe next few sections describe general troubleshooting for the CAS.Later sections describe specific p

68 CAS User’s GuideTroubleshooting Manual System ResetIf the instructions in this manual tell you to perform a "No Key Reset",please

TroubleshootingCAS User’s Guide 69Troubleshooting Stand-Alone SystemsThe CAS is only part of a control system- be sure to check other parts ofthe syst

vi CAS User’s Guide System DiagramThe illustration below shows how the parts of the CAS are connected.When unpacking your system, use the diag

70 CAS User’s GuideTroubleshooting Digital Output TestTest digital outputs this way:1. Connect a 500 ohm to 100 Kohm resistor between the +5V

TroubleshootingCAS User’s Guide 71Checking Computer Supervised SystemsFour elements must work properly in a computer supervised system thatuses an IBM

72 CAS User’s GuideTroubleshooting From the setup menus, make sure that the communications parameters(address, error checking and baud rate) a

TroubleshootingCAS User’s Guide 73Changing the EPROMChanging the EPROM involves minor mechanical disassembly andreassembly of the CAS, but you don&apo

74 CAS User’s GuideTroubleshooting 5. Find the installed EPROM. This is a 28 pin socketed chip which should have an Watlow Anafaze label on to

Appendix: Linear Scaling ExamplesCAS User’s Guide 75Appendix: Linear Scaling ExamplesExample 1SituationA pressure sensor that generates a 4-20 milliam

76 CAS User’s GuideAppendix: Linear Scaling Examples Example 2SituationA flow sensor connected to the CAS measures the flow in a pipe. Thesen

Appendix: Linear Scaling ExamplesCAS User’s Guide 77Example 3SituationA pulse encoder which measures the movement of a conveyor isconnected to the CAS

78 CAS User’s GuideAppendix: Linear Scaling Examples

CAS User’s Guide 79GlossaryAACSee Alternating Current.AC Line FrequencyThe frequency of the AC power line measured inHertz (Hz), usually 50 or 60 Hz.

CAS User’s Guide viiSafetyWatlow Anafaze has made efforts to ensure the reliability and safety ofthe CAS and to recommend safe uses in systems applica

Glossary 80 CAS User’s GuideBlock Check Character (BCC)A serial communications error checking method.An acceptable method for most applications,BCC i

Glossary CAS User’s Guide 81DeadbandThe range through which a variation of the inputproduces no noticeable change in the output. Inthe deadband, spe

Glossary 82 CAS User’s GuideFFahrenheitThe temperature scale that sets the freezing pointof water at 32ºF and its boiling point at 212ºF atstandard a

Glossary CAS User’s Guide 83IInfraredA region of the electromagnetic spectrum withwavelengths ranging from one to 1,000 microns.These wavelengths ar

Glossary 84 CAS User’s GuideNNo Key ResetA method for resetting the controller's memory(for instance, after an EPROM change). NoiseUnwanted elec

Glossary CAS User’s Guide 85Proportional Band (PB)A range in which the proportioning function ofthe control is active. Expressed in units, degreesor

Glossary 86 CAS User’s GuideRS-485—An Electronics Industries of America(EIA) standard for electrical characteristics ofgenerators and receivers for u

Glossary CAS User’s Guide 87VVol t (V )The unit of measure for electrical potential, volt-age or electromotive force (EMF).See Voltage.Vol t age (V

Glossary 88 CAS User’s Guide