LEDs

Color

Indication when On

Ready

Green

The module has passed powerup diagnostics.

Run

Green

Indicates that the unit is in kernel mode–should always be OFF during normal operations.

Modbus

Green

Indicates communication is active on the single RS-232 serial port.

Modbus+

Green

Indicates communication is active on the Modbus Plus port.

Error A

Red

There is an error condition on Cable A

Error B

Red

There is an error condition on Cable B