42
C07170
Fig. 64 -- BACview
6
Handheld Connections
RTU--MP Troubleshooting
Communication LEDs
The LEDs on the RTU--MP (see Fig. 46) indicate if the
controller is speaking to the devices on the network. The
LEDs should reflect communication traffic based on the
baud rate set. The higher the baud rate the more solid the
LEDs will appear. See Table 16 for further information.
Table 16 – RTU--MP 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
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 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
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:
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.
548J
