Instruction Manual

Publication 1753-UM001C-EN-P - March 2010 319
System Signal Variables Appendix B
Digital Output Parameters for 1753-IB8XOB8 Modules
In addition to the output parameters in the table on page 318, the
GuardPLC 1753-IB8XOB8 module features these digital output
parameters.
I/O Data Read/
Write
Description
L+ Switching Outputs L- Switching Outputs
DO1.Error Code DO2.Error Code Read Error mask for all digital outputs
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
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
DO1[xx].Error Code
(1)
DO2[xx].Error Code
(1)
Read Error mask of all digital output channels
0x01 Error in digital output module
0x02 Output switched off due to overload
0x04 Error when reading back the activation of the digital outputs
0x08 Error when reading back the status of the digital outputs
0x40 external short-circuit or short-circuit of EMC protection yield to
an error
0x80 channel is switched off due to an error in the corresponding DO
channel
DO1[xx].Value DO2[xx].Value Write Output value of the digital output channels
0 The output is not set, no current
1 The output is set