Checking the led indicators – Rockwell Automation 1784-PM16SE 16 Axis PCI SERCOS interface Card Installation Instructions User Manual

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22 16 Axis PCI SERCOS interface Card

Publication 1784-IN041A-EN-P – June 2003

Figure 3 Ring topology - 1784-PM16SE card in PC with 1394C-SJTxx-D

Any break in the fiber optical ring disables the SERCOS network and creates
a warning in the ring LED.

Checking the LED Indicators

The card provides three bi-color LED indicators to show the state of the
system. The LEDs are located on the mounting bracket of the
1784-PM16SE card. The LED on the top, marked by OK, indicates the
present health of the card. Just below the OK LED is the SERCOS Ring
Status LED. This is marked with a ring icon and displays the status of the
SERCOS network. Below the SERCOS Ring Status LED is the CP LED.
The CP LED shows the communication phase.

The OK LED

During power up, the card completes an indicator test. The OK indicator is
solid red at startup and then turns to flashing green if the card passes all of
its self tests.

1784-PM16SE card installed in
industrial PC

Fiber Optic Transmit Cable

Fiber Optic Receive Cable