Instruction Manual

Publication 1753-UM001C-EN-P - March 2010 149
Diagnostics Chapter 15
1755-OF8 Analog Output
Module Status Indicators
The 1755-OF8 analog output module (AB-AO) has status indicators
for:
• power supply.
• module status.
While the system is in RUN mode, ERR is indicated continuously for
both a module and an output channel error. Depending on the type of
error, the module may switch only one pair of output channels
(1+2, …, 7+8) to the de-energized state (that is, the value 0V or 0 mA),
but the module continues operation with the remaining channels. If
the entire module is switched off, all output channels are switched to
the de-energized state.
1755-HSC Combination
High-speed Counter and
Output Module Status
Indicators
The 1755-HSC combination high-speed counter and output module
(AB-CO) has status indicators for:
• power supply.
• module status.
• I/O status.
RUN
ERR
1755-
OF8
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.
RUN
ERR
1755-
HSC
19
20
21
22
23
24
L-
1
2
3
4
L-