Instruction Manual

318 Publication 1753-UM001C-EN-P - March 2010
Appendix B System Signal Variables
Digital Output Module Variables for GuardPLC 1600/1800
Controllers, 1753-IB20XOB8 Modules, and 1753-OB16 Modules
The GuardPLC 1600 and GuardPLC 1800 controllers, 1753-IB20XOB8
modules, and 1753-OB16 modules support these digital output
parameters.
I/O Data Read/Write Description
DO.Error Code Read Error mask for all digital outputs
0x0001 Error in digital output range
0x0002 MEZ test of test pattern failed
0x0004 MEZ test, auxiliary supply failed
0x0010 FTZ test of test pattern failed
0x0020 FTZ test of test pattern of the output switch failed.
0x0040 FTZ test of the test pattern of the output switch (disconnection test
of outputs) failed.
DO[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
(1) xx = affected output channel of the controller or module.