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Table 22 – LEDs
The LEDs on the RTU--MP show the status of certain functions
If this LED is on... Status is...
Power The RTU MP has power
Rx The RTU MP is receiving data from the network segment
Tx The RTU MP is transmitting data over the network segment
DO# The digital output is active
The Run and Error LEDs indicate control module and network status
If Run LED shows...
And Error LED shows... Status is...
2 flashes per second Off Normal
2 flashes per second
2flashes,
alternating with Run LED
Five minute auto---restart delay after sys-
tem error
2 flashes per second
3flashes,
then off
Control module has just been
formatted
2 flashes per second
4flashes,
then pause
Two or more devices on this network
havethesameARC156networkaddress
2 flashes per second On
Exec halted after frequent system errors
or control programs halted
5 flashes per second On Exec start---up aborted, Boot is running
5 flashes per second Off
Firmware transfer in progress, Boot is
running
7 flashes per second
7 flashes per second, alternating with
Run LED
Te n second recovery period after brown-
out
14 flashes per second
14 flashes per second,
alternating with Run LED
Brownout
On On
Failure. Try the following solutions:
S Tu rn the RTU---MP off, then on.
S Format the RT U --- MP.
S Download memory to the RTU---MP.
S Replace the RTU---MP.
48TC