Rockwell Automation 160PD1 160 Profibus Communication Module - Manual (Page 20)

4–2 Modes of Operation
Operation Modes The PD1 Module has three modes of operation.
• Power-up mode
• Run mode
• Error mode
Power-up Mode
The following sequence of operation occurs:
1. During power-up, the READY LED illuminates green and the
FAULT and READY LED’s light up for a short periode.
2. The module reads and stores the rotary switch settings.
If the power-up sequence is successful, the module enters the run
mode and the COMM LED turns solid green as soon as data is
exchanged.
If the power-up sequence fails, the COMM and FAULT LED will stay
solid red and the module will enter the Error Mode (see below).
Run Mode
After a successful power-up, the PD1 Module enters the run mode
and operates as a slave device to a master device. In run mode, the
module:
• Accepts and responds to messages from the master on the
network.
• Monitors cable integrity and transmission performance.
• COMM LED green if communication with the master is ok.
If an error is detected, the module enters Error Mode (see below).
Error Mode
Errors are indicated either by the COMM LED:
• Flashing red (5 to 6 flashs) signals a Profibus configuration fault
• Flashing red (other than 5 to 6 flashs) signals a fatal error
• Solid red signals that the power-up sequence failed
or the FAULT LED, which illuminates solid red at any 160 drive fault
or option board fault.
SSC160 drive faults are also indicated by the FAULT LED.
(See table 8.B).
Refer to Chapter 8 for details on how to recover from an error.