Line Monitoring for Discrete Inputs | GE GFK-0787B manual

2

Line Monitoring for Discrete Inputs

Normally-closed inputs on GMR-configured blocks can be monitored for short circuit faults. Normally-open inputs on blocks which are not configured in GMR mode can be monitored for open circuit faults.

Normally-closed Inputs

For applications such as Emergency Shutdown (ESD), normally-closed inputs are generally monitored for short circuits across the lines, since that represents a fail to danger condition (that is: trip is not detected). In general, these inputs are powered from +24V, and a field short to ground is interpreted as a trip condition.

Typical Normally-closed Input

+24V

Source

Genius

Block

Normally-open Inputs

For applications such as Fire and Gas Detection, normally-open inputs are generally monitored for open circuits on the lines, since that represents a fail to danger condition (that is: trip is not detected). In general, these inputs are powered from +24V, and a field short to +24V is interpreted as a trip condition.

Typical Normally-open Input

+24V

Source

Genius

Block

When a block is configured (with a Hand-held Monitor) as a GMR block, its input thresholds change to those listed below.

		Input Voltage	InputStatus	InputState
Source Blocks	tristateinputs	<30% Vdc	off	0
		>50% Vdc	on	1
		< Vdc±7V
		< Vdc±4V	shortcircuitfault	1
	bi-stateinputs	<30 Vdc	off	0
		>50% Vdc	on	1
SinkBlocks	tristateinputs	<4V	shortcircuitfault	1
		>7V	on	1
		<50% Vdc
		>70% Vdc	off	0
	bi-stateinputs	<50% Vdc	on	1
		>70% Vdc	off	0

Input Filter Time

For any circuit configured as a tristate input, the Input Filter Time configured for the block (using a Hand-held Monitor) must be at least 30mS.

GFK-0787B

Chapter 2 Input Subsystem

2-7

Image 25

GE GFK-0787B Line Monitoring for Discrete Inputs, Normally-closed Inputs, Normally-open Inputs, Input Filter Time

Contents

GE Fanuc Automation GFL±002 Preface Related Publications Preface Contents Chapter Configuration Appendix a TÜV Certification Appendix B Maintenance Override Chapter Introduction Components of a GMR System Inter-processor Communications Series 90-70 PLCs Additional Bus Controllers for Communications Busses and Bus Controllers Operation Overview PLC Subsystem Voting on Input Data Input Subsystem Output Subsystem PLC Subsystem Providing Output DataAutomatic System Test Discrete Blocks Genius I/O BlocksAnalog, RTD, and Thermocouple Blocks Block Summary Number of Non-GMR I/O Available for the 788 CPU Number of I/O Points in a GMR SystemNumber of Non-GMR I/O Available for the 789 CPU 798 GMR Configuration and Programming Basic Steps of Configuration and Programming Chapter Input Subsystem Overview One sensor to one Genius input GMR Input Groups Inputs from single-block simplex GMR input groups Non-Voted I/O in the Input SubsystemInputs from non-GMR I/O blocks Types of Blocks in the Input Subsystem Discrete InputsDiscrete Input Processing Discrepancy Reporting for GMR Inputs Calculating Voltage Drops on Tristate Inputs Input Autotest for GMR Inputs Normally-closed Inputs Line Monitoring for Discrete InputsNormally-open Inputs Input Filter Time Manual Input Controls Voted Analog Inputs Analog InputsNumber of Input Sensors per Voted Channel Analog Voting Adaptation Non-Voted Analog Inputs in GMR Input Groups Analog Discrepancy ReportingNon-GMR Analog Blocks Chapter Output Subsystem Types of Blocks in the Output Subsystem GMR Output Handling Duplex Default for OutputsOutput Voting Results of Block Group Voting with Three PLCs Online PLC Logon Control Output Fault Reporting Output Load Sharing Block Output Groups Operation of a 4-Block Output Group Electrical Characteristics of Sink and Source BlocksBus Redundancy in a 4-Block Output Group Manual Output Controls and Diagnostics Redundancy Modes for Output Blocks GMR Mode Basic Hot Standby Mode Operation Hot Standby ModeHot Standby Mode in a GMR System Chapter PLC Subsystem All GMR bus controllers at serial bus address System Startup Online Changes Data Initialization PLC Operation CPU Sweep in a GMR System Sweep Time Contribution of Genius I/O and GBCs Estimating CPU Sweep TimeImportant Note Discrepancies Input ProcessingDiscrete Inputs Discrete Input Voting Voting with Three Discrete Inputs Voting with Two Discrete Inputs Voting for One Discrete Input Analog Inputs Analog Input Voting Voting for Three Analog Inputs Voting for Two Analog Inputs Voting for One Analog Input Discrete Outputs Output Processing Synchronous or Asynchronous Input Autotest and I/O Shutdown Shutdown M12244 ± Iosd Any I/O Shutdown Timer Activated Output Faults that Cause I/O ShutdownM12265 ± Sdcan Cancel I/O Shutdown Programming for I/O Shutdown Hours Shut Down Prevention Shut Down Recovery Communications Between PLCs Entering, Clearing, or Setting Global DataGlobal Data Redundancy Programming for Diagnostics Chapter Diagnostics Input Diagnostics Diagnostics in a GMR SystemOutput Diagnostics Setting Up Other Blocks to Send Multiple Fault Reports Setting Up Blocks to Report Genius FaultsCPU Redundancy Mode Configuration Block Type Summary Table Autotest Sequence GMR Autotesting Setup for Input Autotest Configuration Required for Discrete Input AutotestDiscrete Input Autotest Circuit Fail Mask Operation of the Input Autotest Discrete Output Autotest Operation of the Discrete Output Autotest Block a Pulse-tested Pulse Test Operation Discrete Input Discrepancy Reporting GMR Discrepancy ReportingInput Data Voted Discrepancy Inputs How Output Discrepancy Checking is Performed Discrete Output Discrepancy ReportingDiscrete Output Discrepancy Reporting with Dynamic Outputs Analog Input Discrepancy Reporting Input Line Fault Detection in a GMR Application Clearing the Fault Tables in a GMR System PLC and I/O Fault Tables in a GMR System Reporting of No-Load Faults on 4-Block Output Groups Fault Table Messages for GMR Fault Specific Data Fault Description Code Hex MeaningFault Type for Output Autotest Code PLC Fault Table Messages for GMRMessage Code Code 10903 Code Manual Output Controls and Diagnostics Monitoring Manual Output Controls Discrete Input Fault Contacts for GMR Fault, No Fault, and Alarm Contacts Contact References Associated with an Output Discrete Output Fault Contacts for GMR ShortCircuitfault Overtemperaturefault Overloadfault Alarm Contacts Analog Fault and Alarm Contacts for GMRFault Contacts for Analog Inputs Fault Contacts for Analog Outputs Chapter Configuration Basic Steps of Configuration Configuration Overview For Information to be copied set only Configuration to yes GMR Configuration Software Revision and Checksum Using the GMR Configuration Software Getting Started Installing the Configuration Software Using a Mouse Mouse and Keyboard Guide for the Configuration Software Configuration GMR Configuration Summary Insert the first GBC bus controller group Creating/Selecting a File Opening a Previously-Saved Configuration File Saving a Configuration File Changing to Another Directory Closing a Configuration File without Saving It Closing and Deleting the System Configuration File Starting a New ConfigurationEntering a System Description When you select System, the following menu appears GMR Configuration Selections Simplex CPU ConfigurationShutdown Period Test Interval Input Discrepancy Filter Limits + %R data needed for the application Spare Initialization DataGlobal Data GBC1 GBC2 Initialize Data Parame Comment Ters M12232 Fault ActionsM12234 Write Access Adding Bus Controllers and I/O Modules Genius Bus Controller Group Configuration Exiting the Window Select To Configure Configuring the Input Subsystem for a Bus Controller GroupExiting a Block Group Window SBA Start %I Auto Test GFK-0787B Duplex State GFK-0787B Analog I/O Group Configuration Vote Adaptation Vote Adapt Mode Default State Analog Discrepancy Thresholds and Limits Start %Q Configuring the Output Subsystem for a Bus Controller Group GFK-0787B Options Bus C inputs Reserved inputs Start Ref Configuration References are 0001 to Creating the GMR10 Output File CONFIG4 Printing the GMR Configuration Configuring Bus Controllers Completing the Logicmaster 90 Configuration Creating and Copying the PLC Configuration Logicmaster Configuration Summary GFK-0787B Configuring GMR Bus Controllers and I/O Blocks Copying Configurations Configuring Genius I/O BlocksSetting Up Blocks for Fault Reporting Editing the Reference Addresses Feature Circuit or Factory Selections Block Setting Configuring 16-Circuit and 32-Circuit Discrete DC BlocksDevice Serial bus Block I/O Type Baud Rate Pulse Test Input Filter Time Circuit I/O Type Report Faults Configuration Duplex Output Default State Setting Block Duplex Default Results of Block Voting with Only Two PLCs Online Duplex Voted Output Default State Setting Block Chapter Programming Overview Estimating Memory Usage Program Instruction Set for GMREstimating Bus Scan Time Use of Do I/O and Suspend I/O Reserved References Memor y Write AccessReferences Reserved For Discrete I/O Addressing Input and Output Addressing for GMR I1009 to %I1024 Q1009 to %Q10241024 ± 16 ± 3 x 32 +1 = 913 = %I0913 Analog I/O Addressing Example AnalogOutput Addressing16 x 6 = 96 words required Memory Required for Startup Initialization Data Register %R Memory Assignment for GMR System Status %S References Monitoring the Fault TablesMonitoring Forces and Overrides Status References GMR Status and Control %M References PLC OK Flags Resetting Status Flags M12257 Continue Control ReferencesReference Nickname Description Meaning 40-characterConfiguration File Description Clearing the PLC Fault TablesM12262 Report Programming for Startup Enabling Outputs At Startup Monitoring Startup Status Performing I/O Fault Reset Powerup Note Example Ladder Logic Fault. If both are not 1, initialization continuesThese Program Blocks represent logic Routines that are appropriate for Application Triplex bit is optional the need for this bit depends on When a third PLC comes on line Enabling I/O Point Faults Point FaultsProgramming for I/O Shutdown Fault and No Fault Contacts Programming for Fault and Alarm ContactsClearing Faults Associated with Fault/No Fault Contacts Fault-Locating References Discrete Output Fault Contacts for GMR Discrete Input Fault Contacts for GMR Analog Alarm Contacts for GMR Analog Fault Contacts for GMR Parameters for the Call Function Reading GMR DiagnosticsY3 dummy not used Contains Data Table NumbersRange for Start Value Range for End Value Code Meaning Error Codes for GMR Diagnostics Global Data for the Application Program Programming for Global Data GFK-0787B Select F6 Add Element to Library Adding GMR10 to the Logicmaster Librarian Do not Rename GMR10 Storing a Program to the PLC GFK-0787B Field Description Using the Store Function Storing a Revised Program Storing an Identical Program Following CPU Replacement Using the Download Utility with the Default PLC IDs Using the Program Download UtilityPress the Space Bar to Continue Processing Complete Customizing the Download Utility for Other PLC IDs Programming Information GFK-0787B Chapter Installation Information Termination Boards Genius Bus Connections Input Wiring Single Sensor to Three Blocks Triple Bus Three Sensors to Three Blocks Triple Bus DC Source Block IC660BBD020 Block Wiring for 16-Circuit Source Block in an Input Group DC Sink Block IC660BBD021 Block Wiring for 16-Circuit Sink Block in an Input Group DC Source Block IC660BBD024 Block Wiring for 32-Circuit Source Block in an Input Group DC Sink Block IC660BBD025 Block Wiring for 32-Circuit Sink Block in an Input Group Circuit, 4-Block Output Group Output Wiring for a 16-Circuit, 4-Block Group Block a Block Wiring for a 16-Circuit 4-Block Output Group OFF±ON±OFF Test Output Autotest and Pulse TestingON±OFF±ON Test GE Catalog Number CR7RBXXEL Spectra 700 IEC Control Relay Output Wiring for a 32-Circuit, 4-Block Group Block a Block Wiring for a 32-Circuit 4-Block Output Group GFK-0787B Milliamp Appendix Catalog Number Firmware Description Revision Level TÜV Restrictions Appendix a TÜV Certification COMMREQ, DATAINITCOMM, Call SUB, Callexternal Appendix Maintenance Override Project engineer Projectengineer, Typeapproval Recommendations Index Index-2 Index-3 Index-4