55
Controller Troubleshooting
The LED’s shown in Fig. 32 indicate if the controller is speaking
to the device on the network. The LED’s should reflect communi
-
cation traffic based on the baud rate set. The higher the baud rate
the more solid the LEDs become. See Table 17.
Verify the LED patterns by cycling power to the controller and
noting the lights and flashes. See Fig. 32.
Table 17 —
LED Statuses
The
Run
and
Error
LED’s indicate controller and network status.
NOTE: If you resolve the issue but the
Error
LED does not turn off, cycle power to the controller.
LEDS
STATUS
Power
Lights when power is being supplied to the controller.
NOTE:
The AppController is protected by internal solid state Polyswitches on the incoming power and network connections.
These Polyswitches are not replaceable, but they will reset themselves if the condition that caused the fault returns to normal.
Rx
Lights when the controller receives data from the network segment; there is an Rx LED for Ports 1 and 2.
Tx
Lights when the controller transmits data from the network segment; there is a Rx LED for Ports 1 and 2.
Run
Lights based on controller health. See table below.
Error
Lights based on controller health. See table below.
If Run LED shows...
And Error LED shows...
Status is...
1 flash per second
1 flash per second, alternating with the
Run
LED
The controller files are archiving. Archive is complete
when
Error
LED stops flashing.
2 flashes per second
Off
Normal
2 flashes per second
2 flashes, alternating with
Run
LED
Five minutes auto-restart delay after system error
2 flashes per second
3 flashes, then off
The controller has just been formatted
2 flashes per second
4 flashes, then pause
Two or more devices on this network have the same net-
work address
2 flashes per second
1 flash per second
The controller is alone on the network
2 flashes per second
On
Exec halted after frequent system errors, due to:
- Controller halted
- Program memory corrupted
- One of more programs stopped
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 AppController off, then on
- Download memory to the AppController
- Replace the AppController
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