Siemens Cerberus CS1140 - Page 93

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Fire & Security Products
Siemens Building Technologies Group
01.1999
1. Milestone missing
2. Open line
3. Hard short
4. ASIC Startup problem
Too many milestones
on the line
1. The number of configured mile-
stones does not agree with those
installed
2. FET problem (with DMs, DC1131)
3. Creeping line break
If fault rectified: Startup
problem on ASIC
Creeping line break (line
resist. too high and not
constant)
forwards <> backw. <> 0
Forwards > Configuration
Missing detectors/mile-
stones OR creeping line
break
Forwards < Configuration
Backwards = Config.
Disconnect forward line,
reconfigure D-Bus, wait
2 minutes
Forwards = Config. –1,
but all detectors/mile-
stones installed
Reconfigure D-Bus, wait 2
minutes, repeat procedure
if necessary
1. At the terminal, select
Poll function unit infor-
mation and check the
number of addresses
forwards/backwards,
or connect logger
and reconfigure D-Bus
 Check chain for-
wards/backwards.
2. Check line after each
device with a multime-
ter.
Possible fault
Remedy
Displayed on LCD
Compare logger printout with configuration of detector
types
Note DMs and DCs (milestones) and trouble mes-
sages in logger printout
FET problem
Milestone = DM or DC
- Only possible after startup of a
line or after inserting a new de-
vice
- No trouble message relating to
line short circuit or line break
Line unit in collective
mode AND same num-
ber of trouble messages
as configured detectors
Loop lineStub line
At the terminal, select Poll function unit infor-
mation and check number of addresses for-
wards/backwards, or connect logger and re-
configure D-Bus*,
 Check chain forwards/backwards