GE Series 90-70 manual Global %G References for the I/O Link Program Blocks

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Using Nicknames for the %P References

If you want to use the %P nicknames listed in the table, add them to the Variable

Declaration Table (see page 24).

Global (%G) References for the I/O Link Program Blocks

The %P references listed in the previous table are used for link configuration, control, and monitoring. They will be included in the application program as explained on subsequent pages.

An I/O Link Program Block also uses certain %G references for its own operations. These %G references should not be included in the application program. They should be reserved for the exclusive use of the Program Block.

Program Block Identifier	%G References to be
	Reserved

LINK73X	%G1025 ± %G1040

LINK77X	%G1025 ± %G1040
	%GA1025 ± %GA1040
	%GB1025 ± %GB1040

LINK78X	%G1025 ± %G1040
	%GA1025 ± %GA1040
	%GB1025 ± %GB1040
	%GC1025 ± %GC1040
	%GD1025 ± %GD1040

GFK±0644

Chapter 4 Programming Guide

27

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Contents GE Fanuc Automation GFL±002 Related Publications Content of this ManualWe Welcome Your Comments and Suggestions Contents System Overview Chapter IntroductionMaster or Slave Operation Application Software LEDs Module DescriptionReset Pushbutton Module SpecificationsSerial Ports CatalogNumber Cable Types for the I/O LinkCable Lengths on the I/O Link Optical Adapter Input and Output Data Operation of the I/O LinkData Returned by Slaves Data Sent by the MasterInputs and Outputs Hold Last State Faults on the I/O Link Link Control DiagnosticsGetting Started Install the module and complete the I/O LinkComplete the program logic for the I/O Link Module Installing the I/O Link Interface Module in the Rack Chapter InstallationLED Name LED Status Indication Removing the I/O Link Interface Module from the RackPorts on the I/O Link Module Connecting the I/O Link Interface Module to Other DevicesLink Module Used as a Master Link Module Used as a Slave Serial Port Pin AssignmentsOrder of the Devices on the Link Cable Diagram, No Optical Adapter Cable Diagram, Electrical Cable to Optical Adapter Optical Adapter InstallationCable Connections Configuration Steps Chapter Logicmaster 90-70 ConfigurationGFK-0644A Overview Chapter Programming GuideAdding the Program Block Logic to an Application Program Selecting a Program BlockCalling the Program Block Using Multiple Calls to the Program BlockExample Call Instruction 3rdModule 4thModule Program %P References for the I/O Link Program BlocksGlobal %G References for the I/O Link Program Blocks Using Nicknames for the %P ReferencesConfiguration Logic, Example Configuring I/O LinksSpecify the Number of I/O Link Modules Configuration GuidelinesStart/Restart bit Set Master or Slave Mode bitReset or Stop bit Controlling the I/O Link ModuleDisable or Enable the Output Update bit Disable or Enable the Input Update bitMonitor the Module bit Monitoring Link OperationMonitor Communications Status bit Monitor for Link Failure bit Monitor for an Invalid Configuration or Link Fault bitError Description RecommendedAction Code Error Codes TroubleshootingConfiguration Error Codes Index GFK-0644A Index