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Table 17 – 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 ac tive
The Run and Error LEDs indicate control modul e and networ k status
If Run LED shows...
And ErrorLED shows... Status is...
2 flashes per s ec o nd Off Normal
2 flashes per s ec o nd
2flashes,
alternating with Run LED
Five minute a uto---restart delay after
system error
2 flashes per s ec o nd
3flashes,
then off
Control module has just been
formatted
2 flashes per s ec o nd
4flashes,
then pause
Two or more devi ces on thi s ne twork
havethesameARC156networkaddress
2 flashes per s ec o nd On
Exec halted after frequent system errors
or control programs halted
5 flashes per s ec o nd On Exec start---up aborted, Boot is running
5 flashes per s ec o nd Off
Firmwar e transfer in progress, Boot is
running
7 flashes per s ec o nd
7 flashes per s ec o nd, alternating with
Run LED
Ten second recovery period after
brownout
14 flashes per second
14 flashes per second,
alternating with Run LED
Browno ut
On On
Failure. Try the following solutions:
S Turn the RTU---MP off, then on.
S Format the RTU --- MP.
S Download memory to the RTU---MP.
S Replace the RTU---MP.
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