Rockwell Automation 160IB1 InterBus Communication Module - Manual (Page 20)

4–2 Modes of Operation
Operation Modes The IB1 Module has three modes of operation.
• Power-up mode
• Run mode
• Error mode
Power-up Mode
If the power-up sequence is successful, the module enters the run
mode (RC LED on) and the TR LED flashes green.
If the power-up sequence fails, the TR LED will go to off and the
module will enter the Error Mode (see below).
Run Mode
After a successful power-up, the IB1 Module enters the run mode and
operates as a slave device to a master device (BA LED on).
The RC LED is on, indicating the receiving of messages.
In run mode, the module:
• Accepts and responds to messages from the master on the
network.
• Monitors cable integrity and transmission performance.
TR LED is on in case of PCP messages are exchanged. If an error is
detected, the module enters Error Mode (see below).
Error Mode
If the module detects an error, the fault is indicated by the FLT LED.
Refer to Chapter 8 for details on how to recover from an error.