RTU Open 55
If you have problems mounting, wiring, or addressing the RTU Open, contact Carrier Control Systems Support.
Serial number
If you need the RTU Open's serial number when troubleshooting, the number is on:
• a sticker on the back of the main controller board
• a Module Status report (modstat) from your user interface
LED's
The LED's on the RTU Open show the status of certain functions.
The RTU Open has power
The RTU Open is receiving data from the network segment
The RTU Open is transmitting data over the network segment
The binary output is active
The
Run and Error LED's indicate controller and network status.
2 flashes per second
Off Normal
2 flashes per second 2 flashes,
alternating with
Five minute auto-restart delay
after system error LED
2 flashes per second 3 flashes, then off The controller has just been
formatted
2 flashes per second On Exec halted after frequent system
errors or control programs halted
5 flashes per second Off Firmware transfer in progress,
Boot is running
7 flashes per second 7 flashes per second,
alternating with
Ten second recovery period after
brownout LED
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