Publication 0160-5.18 - June 2003
4-2 Modes of Operation
Modes of Operation (Continued) Power-up Reset Mode (Continued)
If the power up or reset sequence fails, the COMM LED will turn
solid red and the 160-DN2 module will enter the Error mode (see
heading below for more information).
Run Mode
After a successful power-up or reset, the 160-DN2 module enters the
run mode and operates as a slave device to a master device. In run
mode, the module:
• Accepts messages from the master on the DeviceNet network.
• Monitors DeviceNet incoming power.
If an error is detected, the 160-DN2 module will enter the Error mode
(see heading below for more information).
Error Mode
If the 160-DN2 module detects an error, the COMM LED is affected.
Errors are critical or noncritical, and are summarized below.
See Chapter 7
, Troubleshooting for details in the troubleshooting
chart on how to recover from an error.
Table 4.A COMM LED State During Power-up Reset Mode
COMM LED State Description
Flashes Green 1/4 second,
Red 1/4 second,
then goes blank
Occurs when power is applied to module.
Blank Power-up initialization is taking place.
Solid Red 160-DN2 module is in Error mode. Indicates failed
initialization, duplicate node address or incorrect baud rate.
Solid Green 160-DN2 module is in the Run mode.
Table 4.B COMM LED State During Error Mode
COMM LED State Error Type Description
Solid Red
Critical
(not recoverable)
Power-up initialization failure.
Duplicate node address detected.
Incorrect baud rate.
Flashing Red
Non-Critical
(recoverable)
I/O connection timed out.
Off
Non-Critical
(recoverable)
DeviceNet power lost.
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