18
3, 8, or 16 Axis SERCOS interface Module
Publication
1756-IN572E-EN-P – March 2004
Checking the LED Indicators
The module provides three LED indicators to show the state of the system.
The LEDs are located on the bezel of the 1756-M03SE, 1756-M08SE, and
1756-M16SE modules. The LED on the right, marked by OK, indicates the
present health of the module and the communication status. To the immediate
left of the OK LED is the SERCOS Ring LED. This is marked with a ring
icon and displays the status of the SERCOS network. A third LED is situated
on the far left and displays the status of the SERCOS Communication Phases.
The CP LED is for informational purposes only.
The following diagram shows the positioning of the LEDs.
Figure 7 LED Location and Description
During power up, the module completes a self test that includes an indicator
test. All LEDs go red for one second, green for one second, and off for one
second.
OK
SERCOS Ring
Status
Module Health &
Communication
Status
CP
SERCOS
Communication
Phase
SERCOS interface
TM