Carrier 50HCQ04---12 - Manual (Page 22)

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C10825
Fig. 16 -- Example Modstat
Communication LED’s
The LED’s indicate if the controller is speaking to the
devices on the network. The LED’s should reflect
communication traffic based on the baud rate set. The
higher the baud rate the more solid the LED’s will appear.
Table 3 – LED’s
The LED’s on the RTU--OPEN show the status of certain functions
If this LED is on... Status is...
Power The RTU---OPEN has power
Rx The RTU---OPEN is receiving data from the network segment
Tx The RTU---OPEN is transmitting data over the network segment
DO# The digital output is active
The Run and Error LED’s 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 2 flashes, alternating with Run LED Five minute auto---restart delay after system error
2 flashes per second 3 flashes, then off Control module has just been formatted
2 flashes per second 4 flashes, then pause Two or more devices on this network have the same
ARC156 network address
2 flashes per second On Exec halted after frequent system errors or control pro-
grams 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
Ten second recovery period after brownout
14 flashes per second 14 flashes per second, alternating with
Run LED
Brownout
On On Failure. Try the following solutions:
--- Turn the RTU---OPEN off, then on.
--- Format the RTU---OPEN.
--- Download memory to the RTU---OPEN.
--- Replace the RTU---OPEN.