MVI46-PDPS ♦ SLC Platform
Diagnostics and Troubleshooting
Profibus DP Slave Communication Module
User Manual
ProSoft Technology, Inc.
Page 35 of 53
4.2
LED Indicators
Troubleshooting the operation of the PROFIBUS Slave port can be performed using
several methods.
The first and quickest is to scan the LEDs on the module to determine the existence and
possibly the cause of a problem. This section provides insight into the operation of the
PROFIBUS Slave Port status LEDs.
4.2.1 LEDs for the PROFIBUS Slave Port
ACTIVE
ERROR
Description
Flashing
On
PROFIBUS communication problem (not
receiving output)
Off
On
Module configured and waiting for first output
data set.
Flashing
together
Configuration error during initialization.
Alternate
flashing
Watchdog timer expired.
On
Off
Normal operation.
On
Rapid/irregular flash
Configuration problem from master.
Off
Flashing
User timeout expired.
Off
Off
Module not receiving power or program
terminated.