A Single Break (Cut-Off) On The Com Loop - Panasonic EBL128 Planning Instructions

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: -
4.1.1
which shall be > 12 V DC. There can be none, one or up to 64 Short
Circuit Isolators connected on the COM loop.
In case of short-circuit or a break (cut-off) on the COM loop, EBL128
will in order to localize it, do the following:
 The COM loop voltage and communication will be turned off.
Because of that all isolators will also be turned off, i.e. the L
(SA) contact in each isolator will be "open".
 The COM loop voltage and communication will be turned on
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again. The isolators will now be turned on, one after another
in the A-direction, until it is not possible to turn on any more
isolator, i.e. the isolator closest to a short-circuit will not be
turned on alt. the isolator closest to (just before) a break will
be turned on but the isolator after a break can of course not be
turned on.
 The COM loop communication will now start in the B-
direction also and the isolators will be turned on, one after
another, until it is not possible to turn on any more isolator,
i.e. the isolator closest to a short-circuit will not be turned on
alt. the isolator closest to (just before) a break will be turned
on.
 In case of short-circuit on the COM loop, only the segment(s)
between the now turned off isolators will be isolated. In case
of a break, no segment(s) will be turned off.
 One or more fault messages will be shown in the EBL128
display, see below.
The fault messages will be different depending on if it is a single or
double break or short-circuit on the COM loop, as well as if there is
none, one or several isolators connected on the COM loop, see
following chapters.
In any case, each unit not found by EBL128 will generate a fault:
FAULT: No reply xx-xx
Press "" to see the technical address.
FAULT: No reply techn. address xxx
Regarding Fault acknowledge,
Instructions.

A single break (cut-off) on the COM loop

If not all units are found when communicating only in the A-direction
but all units are found when communicating in both directions, it
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Short-circuit on a COM loop with no isolators:
communication will not be turned on.
EBL128 Planning Instructions V2.0.x
see the
18
EBL128 Operating
The voltage and