User manual

2-7
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
2.5 Interruption or Short-Circuit of the ASi cable
If the ASi cable is short-circuited due to pinching or fraying of the insulation,
data exchange no longer takes place on the ASi cable.
If the ASi cable is interrupted, you can no longer address the actuators or
sensors which, as viewed from the DP/ASi link, are located downstream of
the point of interruption.
The actuators and sensors upstream of the point of interruption are still able
to operate.
!
Warning
If the ASi fails completely or partially, the DP/ASi link can no longer ad-
dress the actuators and sensors affected by the failure.
Data is no longer exchanged with the ASi slaves affected.
If an ASi slave detects a failure of the ASi, the response depends on the ASi
slave concerned.
!
Warning
There is a possibility of the ASi slave retaining its latest state after a failure
– for instance, outputs that have been set remain set.
Study the description of the ASi slave.
ASi short-circuit
ASi interruption
ASi slave reaction
ASi Basics