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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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