Instruction Manual

Publication 1753-UM001C-EN-P - March 2010 325
System Signal Variables Appendix B
Analog Output Signals for 1753-IF8XOF4 Modules
The 1753-IF8XOF4 module supports these analog output signals.
I/O Data Read/Write Description
Module.SRS Read Slot number (System.Rack.Slot)
Module.Type Read Module type: 0x
Module.Error.Code0069 Read Error mask for the module
0x0000 I/O processing may be running with errors
0x0001 No I/O processing (CPU not in RUN)
0x0002 No I/O processing during start-up tests
0x0004 Manufacturing interface running
0x0010 No I/O processing due to incorrect configuration
0x0020 No I/O processing due to exceeded fault rate
0x0040/80 No I/O processing because configured module is not plugged in
AO.Error Code Read Error mask for all analog inputs
0x0001 Module error
0x0002 MEZ test: safety switch 1 failed
0x0004 MEZ test: safety switch 2 failed
0x0008 FTZ test: of test pattern failed
0x0010 FTZ test: error checking coefficients
0x0400 FTZ test: 1. Temperature threshold exceeded.
0x0800 FTZ test: 2. Temperature threshold exceeded.
0x2000 MEZ test: status of safety switches
0x4000 MEZ test: active disconnection by watchdog failed
AO[xx].Error Code
(1)
Read Error code of analog input channels
0x01 Error in the analog output unit
0x80 AO[xx].Value not in the specified range.
AO[xx].Value Write Output value of AO channels:
Current characteristic: 0…2000 (0 mA…20 mA)
Current characteristic: -2000…0 (0 mA)
Values are tested for plausibility before standardization.
Current characteristic:
• Values < 0: standardization with 0
• Values < sampling point LOW: standardization with sampling point LOW
• Values > sampling point HIGH: standardization with sampling point HIGH
IMPORTANT: Outputs must not be used as safety-related outputs!
AO[xx].Used Write Configures the channel for operation
0 Channel is not in operation.
1 Channel is operating.
(1) xx = affected output channel of the controller or module.