Test Failures - Siemens ST950 Handbook

SEC
Phase Bus
Lamp Supply
LSLS voltage
monitoring
At this point, the Self-Test has successfully checked-out the logic side of all the
LSLS cards that it has found. It then displays a scrolling pattern on the amber LEDs
on these LSLS cards to prove that it can address all the cards correctly and to show
that the first part of the Self-Test is complete.

11.4.1 Test Failures

If test fail during the 1st part of self test the handset output will provide details of the
failure. The section below details the output and describes what possible causes
there are.
No LSC or LSLS!
No lamp switch cards were detected; check the connections from the CPU Card to
each LSLS and that all the LSLS Cards appear powered (i.e. their status LEDs are
flashing).
Missing LSLS?
If it appears that an LSLS Card is missing, e.g. if the first and third cards are
detected, but not the second, then the error message "Missing LSLS?" is displayed.
It should be clear from the information displayed prior to this error message (shown
above in grey) as to which card or cards appear missing. Check the connections
from the CPU Card to each LSLS and that all the LSLS Cards appeared powered
(i.e. their status LEDs are flashing).
Note: If the last fitted card is not found, the Self-Test will not detect the problem at
this point. For example, it will continue if LSLS#1 and LSLS#2 are found, but
LSLS#3 is not powered. It is therefore essential that the user checks (at the start of
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Checks communications with the SEC
CPU
Phase bus system initialization
LSLS cards found and configured.
Once initialized, the Phase Bus
Processor and LSLS Cards perform
more thorough checks and may detect
faults. This could result in some of the
general error message (as shown in
section 11.7) being displayed.
Checks that the measured Lamp Supply
is 0V with the Lamp Supply Switched off
Checks that the LSLS voltage monitors
are reporting that all outputs are
switched off
Primary Driver tests complete
EFC Driver tests – place holder for
possible future tests.
Unrestricted
7
manpreet.jeerh
ST950 ICM Handbook
Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
SEC CPU......Active
P/Bus Init...Ok
L/Supply Off=0V
V/Mons Off...Passed
PRI DRV done
EFC DRV start
EFC DRV done
Page
Status
Date
Document No.
Mobility is a division of Siemens Plc
141 of 154
Issued
January 2020
667/HE/45950/000