Siemens ST950 Handbook page 43

Solid on
SYS – System (green)
Flashes to indicate status
Slow flash
Medium flash
Very fast flash
COM – Communications (green)
On
Off
BSY – Busy (red)
Flashes to indicate the system is busy performing an operation that must not be interrupted,
for example start up, upgrade, USB "memory stick" style interface is busy. Do not remove
USB device or switch off the controller while this LED is flashing.
BEHIND HANDSET CONNECTOR
The pair of multicolour LEDs behind the handset connector are as shown below
(viewed from the front of the CPU Card).
SEC FF
The function of each LED is described below.
SEC – SEC Status
Green flash, long on, short off
Green flash, equal on and off
Green flash, short on, long off
Red
FF – Fail Flash Status
Green flash, equal on and off
Security classification Unrestricted
Version 7
Last Editor manpreet.jeerh
Document Name ST950 ICM Handbook
Copyright © Siemens plc 2020. All Rights Reserved.
Programming complete, power cycle required
Normal operation
Normal operation, Fault present
Restricted mode
Under UTC control, pulses off indicate receipt of messages
Not under UTC control, pulses on indicate receipt of messages
Mobility is a division of Siemens Plc
Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Awaiting start request from Primary
Normal operation
Shutdown
SEC requested controller shutdown
Normal operation
Page 43 of 154
Status Issued
Date January 2020
Document No. 667/HE/45950/000