VIPA System 200V IM Series, Manual

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Manual VIPA System 200V
Chapter 3 Profibus DP
HB97E - IM - Rev. 06/29 3-89
Using the diagnostic LEDs
The following example shows the reaction of the LEDs for different types of
network interruption.
A
B
Slave 1
Slave 2
Master
LED
slave 1 Position of
interruption
LED A B
RD blinks off
ER off on
DE off off
LED
slave 2 Position of
interruption
LED A B
RD blinks on
ER off off
DE off on
Interruption at position A
The Profibus has been interrupted.
Interruption at position B
Communication via the backplane
bus has been interrupted.