Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 308)

308 Publication 1753-UM001C-EN-P - March 2010
Appendix B System Signal Variables
DO.State
(1) Read Error mask for all digital outputs
0x0000 No errors detected
0x0001 Error of the DO section of the module
0x0002 Within the multiple error occurrence time: safety switch 1 faulty
0x0004 Within the multiple error occurrence time: safety switch 2 faulty
0x0008 Within the multiple error occurrence time: test sample tests faulty
0x0010 Within the multiple error occurrence time: readback channels faulty
0x0020 Within the multiple error occurrence time: active switch-off faulty
0x0100 Within the safety time: CS signals faulty
0x0200 All outputs switched off; total current too high
0x0400 Within the safety time: temperature limit 1 exceeded
0x0800 Within the safety: temperature limit 2 exceeded
0x01000 Within the safety time: auxiliary voltage monitoring: undervoltage
0x02000 Within the multiple error occurrence time: status of the
safety switches
DO[0x].State
(1)(2) Read Error mask for digital output channels
0x00 No error detected; outputs driven as expected
0x01 Error in digital output module; outputs not driven
0x02 Output switched off due to overcurrent; outputs not driven
0x04 Error during readback of the digital output; outputs not driven
DO[0x].Value
(1) Write Output value of digital output channels
0 Output de-energized
1 Output activated
DI.State Write Error mask for all digital inputs
0x0000 No error detected
0x0001 Error of the DI section of the module
0x0002 Within the safety time: test sample test faulty
DI[xy].State
(3) Read Error mask of digital input channels
0x00 No error detected
0x01 Error in the digital input module; input value set to 0
DI[xy].Value
(2) Read Input values of digital input channels
0 Input not activated
1 Input activated
(1) Values are ORed.
(2) 0x = output channel 01…16 for GuardPLC 2000 controller and 01…08 for GuardPLC 1200, 1600, and 1800 controllers.
(3) xy = input channel 01…24 for GuardPLC 2000 and GuardPLC 1800 controllers and 01… 20 for GuardPLC 1200 and 1600 controllers.
I/O Data Read/Write Description