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Appendix B System Signal Variables I/O Data L+ Switching Outputs L- Switching Outputs — DO2[xx].2 Pole used — Switch-on delay Read/ Write Description Write Configures the channel for 2 pole operation. Write 0 channel DO2[xx] is not used for 2-pole operation. 1 channel DO2[01] is used for 2-pole operation with channel DO1[04], or channel DO2[02] is used for 2-pole operation with channel DO1[08] Sets switch-on delay for 2-pole tests, due to lamp load, inductive and capacitive load (1) xx = affected output channel of the controller or module. Digital Output Parameters for 1753-IB16XOB8 Modules In addition to the output parameters in the table on page 318, the GuardPLC 1753-IB16XOB8 module features these digital output parameters. I/O Data Read/Write Description DO.Error Code Read Error mask for all digital outputs 320 0x0001 Error in digital output range 0x0002 MEZ test of safety shutdown failed 0x0004 MEZ test, auxiliary supply failed 0x0008 FTZ test of test pattern failed 0x0010 MEZ test of test pattern of the output switch failed 0x0020 MEZ test of test pattern of the output switch (disconnection test of outputs) failed 0x0040 MEZ test, active disconnection via watchdog failed 0x0080 FTZ test of the period monitoring causes an error. 0x0100 FTZ read back of the period monitoring causes an error 0x0200 All outputs switched off, total current exceeded 0x0400 FTZ test: 1. Temperature threshold exceeded 0x0800 FTZ test: 2. Temperature threshold exceeded 0x1000 FTZ test: Monitoring of auxiliary supply 1: Undervoltage 0x2000 FTZ test: Monitoring of auxiliary supply 2: Undervoltage 0x4000 Flip-flop of the supply monitoring (18V) causes undervoltage 0x8000 MEZ test of the period monitoring causes an error Publication 1753-UM001C-EN-P - March 2010
