Inputs And Outputs; Inputs (I/P); Outputs (O/P); Detector Fault Monitoring (Dfm) - Siemens ST950 Handbook

32 I
NPUTS AND
32.1

Inputs (I/P)

Inputs into the controller may include the following (refer to the sections given for more
information):
Section 8 – Demands and extensions from detectors
Section 9 – Call/Cancel detectors
Section 10 – Extensions from SDE/SA assessors
Section 11 – Extensions from all-red detectors
Section 17 – UTC control bits
Section 18 – Priority Vehicle detectors
Section 19 – Hurry Call requests
Section 30 – Links from other controllers
32.2

Outputs (O/P)

Outputs from the controller may include the following:
Section 17 – UTC reply bits
Section 19 – Hurry Call Confirmations
Section 30 – Links to other controllers
32.3

Detector Fault Monitoring (DFM)

DFM is allocated to specified detector inputs and, if required, pedestrian push-button
inputs.
This is separate from the specific monitoring applied to pedestrian on-crossing
detectors, pedestrian kerbside detectors, and Priority/LRT vehicle detectors.
With the DFM facility, if an input does not change state and remains permanently active
or inactive for a specified period, a DFM fault has been confirmed and the following
happens:
The cabinet alarm LED is illuminated.
Optionally, the input can be forced active or forced inactive.
Entries will be made in controller's fault logs.
DFM faults can only be cleared if the controller has seen the input change state since
reporting the fault. If the input has remained permanently active or inactive since the
fault was reported, the DFM fault cannot be cleared.
Security classification
Version
Last Editor
Document Name
Copyright © Siemens plc 2015. All Rights Reserved.
O
UTPUTS
Unrestricted
4
Paul Cox
ST950 General Handbook
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Page 89 of 107
Status Issued
Date 16-Jul-2015
Document No. 667/HB/46000/000
Mobility is a division of Siemens Plc