Several Breaks (Cut-Offs) On The Com Loop - Panasonic EBL128 Planning Instructions

Panasonic Electric Works Nordic AB
MEW01090 Rev: 3
4.1.2
FAULT: Cut-off SCI n <-> SCI n
n = A, B, 0, 1, 2, 3, 4, 5, 6 or 7 depending on if no one, one or several
isolators are used. A & B are the built-in control unit isolators in the
A- and B-direction respectively.
If no isolator is used the information will be: A<->B.
If one isolator (no. 0) is used: A<->0 or 0<->B
If two isolators (no. 0 and no. 1) are used: A<->0, 0<->1 or
1<->B
...and so on.
The break (cut-off) is found in the specified segment, e.g. A<->0.
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Each 10 minute a new attempt is made to communicate in the A-
direction only.
When the fault is corrected (no break / cut-off) the communication
automatically returns to communicate in the A-direction only.

Several breaks (cut-offs) on the COM loop

If not all units are found when communicating in the A-direction
only, and not when communicating in both directions, there must be
two or more breaks on the COM loop. A "no replay fault" (see
above) will be generated for each unit not found.
There will also the following fault message:
FAULT: Cut-off SCI n <-> SCI n
n = A, B, 0, 1, 2, 3, 4, 5, 6 or 7 depending on if no one, one or several
isolators are used. A & B are the built-in control unit isolators in the
A- and B-direction respectively.
In case of a break (cut-off) in more than one segment there will also
be the following message:
FAULT: Several faults on COM loop
In case of "Several faults on COM loop": Correct the cut-off fault
shown in the display and the next cut-off fault will be shown, and so
on.
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Each 10 minute a new attempt is made to communicate in the A-
direction only.
When all faults are corrected (no breaks / cut-offs) the communication
automatically returns to communicate in the A-direction only.
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NOTE! The fault has to be acknowledged and it can last up to 10 minutes
before the communication returns to communicate in the A-direction only.
EBL128 Planning Instructions V1.1.x
17
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