Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 150)

150 Publication 1753-UM001C-EN-P - March 2010
Chapter 15 Diagnostics
Power Supply and Module Status
I/O Status
While the system is in Run mode, ERR is indicated continuously for
both a module and a counter channel error. Depending on the type of
error, the module may switch off only one counter channel (that is,
the counter transmits the value 0 to the logic, the output has no signal,
but the module continues operation with the remaining counter
channel). If the entire module is switched off, all counter channels are
switched off.
Indicator Status Description
RUN On (green) The module has the correct operating voltage (24V DC).
Off The module has no power.
ERR On (red) If the system is in Stop mode, one or more of the inputs or
outputs is faulty or the module is faulty.
Use the RSLogix Guard PLUS! software to verify the location
of the fault. If the module is faulty, replace the module
immediately or the safety-related operation of the
GuardPLC 2000 controller is not maintained.
Off The module is operational.
Indicator Status Description
1, 2, 3, 4 On (green) The corresponding output is energized.
Off The corresponding output is de-energized.