Last Editor Paul Cox - Siemens ST950 Handbook

Hurry Call see Section 19
Manual Operation
Manual Step-On, if fitted. see Section 21
VA, CLF or FT Operation (selected via mode switch) see Section 22
Cableless Linking (CLF) see Section 23
Vehicle Actuated (VA) see Section 24
Fixed Time (FT) / Fixed Vehicle Period (FVP) see Section 25
Light Rail Transit (LRT) see Section 26
The following factors influence the selection of the modes:
The status of the incoming 'hurry call' signals
The status of the UTC and MOVA force signals
The status of the Priority and LRT Inputs
The status of the manual select buttons
Part-time requests
Time switch/CLF signals
Conditioning signals
Integrity of the hardware/software
The mode priorities are defined during controller configuration with the following
restrictions, assuming all stipulated modes are utilised:
Signals off / flashing periods during the Part-time cycle have highest priority after
start-up mode.
Cableless linking mode must be higher priority than VA mode.
Either VA or fixed time mode is always the lowest priority.
With the mode priorities defined, the controller adopts the highest priority mode
for which the following conditions of entry apply:
Part-time off (or flashing) period: Part-time off selected by master time clock or
special conditions such as queue detectors.
Hurry call mode: Hurry call applied and any call delay expired.
UTC and MOVA mode: When the controller has received force bits.
Manual Control selection: MANUAL selected on the Manual Panel.
Cableless linking mode: A valid CLF plan is selected by the master time clock.
Bus/LRT/Emergency Vehicle Priority mode: Entered if a request exists for priority
from a special vehicle detector, (e.g. LRT request).
Vehicle actuated or fixed time mode: Entered if a request does not exist for a
higher priority mode.
Security classification Unrestricted
Version 4
Last Editor Paul Cox
Document Name ST950 General Handbook
Copyright © Siemens plc 2015. All Rights Reserved.
see Section 20
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Page 78 of 107
Status Issued
Date 16-Jul-2015
Document No. 667/HB/46000/000
Mobility is a division of Siemens Plc