Omron CQM1-ARM21, Operation Manual

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Physical Layout of the Unit
Section 2-1
11
2-1-2 LED Indicators
RUN (green) : Unit status indication.
ON : Indicates that the unit is receiving power from the
CQM1 power supply, and that the unit has initialised
properly.
Flashing : The unit is initialising.
ERR (red) : General error indication.
ON : An internal hardware problem is detected during
power-on initialisation (RUN LED flashing).
Errors in the data transmission between slaves and
the master.
A requested change of operation mode was not pos-
sible.
APF (red) : AS-Interface power fail indication.
ON : The supply voltage on the AS-Interface line is too low
to guarantee reliable communication.
CER (red) : Configuration error.
ON : The detected actual configuration is different from the
stored ’projected’ configuration.
AUP (yellow) : Auto-programming is available.
ON : One slave is missing, and can be replaced by an
identical slave with address 0, when the master is in
Protected Mode. The address will then automatically
be set to that of the missing slave.
CM (yellow) : ON : The unit is in Configuration Mode or in Setup Mode.
1. Configuration Mode.
The AS-Interface master will automatically accept new
slaves in the configuration, and start I/O data ex-
change with them.
2. Setup Mode.
The permanent configuration data in the CQM1-ARM
can be modified, slave addresses and slave parame-
ters can be read/written.
OFF : the unit is in Protected Mode.