Siemens ST950 - Page 42

Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification
Unrestricted
Page
42 of 154
Version
7
Status
Issued
Last Editor
manpreet.jeerh
Date
January 2020
Document Name
ST950 ICM Handbook
Document No.
667/HE/45950/000
Copyright © Siemens plc 2020. All Rights Reserved. Mobility is a division of Siemens Plc
The function of each LED is described below.
WD – Watchdog (red)
Illuminated when the Primary CPU is not running or an internal fault has been detected.
HB – Heartbeat (green)
Flashes in a heartbeat pattern
Primary CPU software is operating normally
Flashes slowly (once per second)
Controller self test
Flashes quickly (several times per second)
Non normal operation e.g. startup
SE - System Error (red)
Permanently on
Fault is present, e.g. one or more entries
present in the Fault Table
Flashes slowly (with the Heartbeat LED
flashing in a heartbeat pattern)
Reserve Mode
Flashes quickly (with the Heartbeat LED
flashing in a heartbeat pattern)
Reserve Mode is latched; manual reset
required
Flashes quickly along with the Heartbeat LED
(both flashing quickly)
Fault with the Primary CPU, e.g. self test fault
found
Flashes quickly at power-up (with the
Heartbeat LED off)
RTC faulty, e.g. backup support expired
SD – Shutdown (red)
Illuminated when the controller is in the Shutdown Mode i.e. signals are not being controlled.
FF – Fail Flash (yellow)
Flashes when hardware fail flash is active.
PRG – Program (blue)
Flashes to indicate programming of an IC4 configuration and / or new firmware is pending or
in progress.
Single pulse
IC4 configuration available for programming
Double pulse
Firmware upgrade available
Heart restore pending
Wipe request pending
Fast flash
Programming in progress
WD HB SE SD FF PRG SYS COM BSY