Specifications

Siemens Mobility, Traffic Solutions

Sopers Lane, Poole, Dorset

BH17 7ER

Version 10 Page 52 of 120 Status Issued

Last Editor harry.smyth Date 03 November 2014

Document

Name

GENERAL HANDBOOK FOR HEIMDALL

DETECTORS

Doc. No.

667/HB/31900/000

5.4.4.4 Detector Alignment

The detectors should be ‘aimed’ at a position approximately 1.5 metres from the

associated ‘stop line’, toward oncoming traffic, as shown in Figure 17 below.

Figure 17 – Stop Line Detector Installation – Plan View

5.4.4.5 Maximum Presence Time

The maximum presence time attribute defines the period of continuous detection before

the detector tunes the stationary object and detection returns to normal. The default

setting is for a period of 4 minutes. However if adjustment is required, DIP switch 5 can

set the maximum presence time to 30 minutes. Alternatively, if a user defined value is

required, the terminal command MPT can be set to the user defined variable (reference

section 7.7.4).

5.4.4.6 Detection Method

The default setting for the detector is such that both static and moving vehicles are

detected. However, the user may modify the detector so that moving vehicles are filtered

from the detection output. This setting can be modified using DIP switch 5 or by using the

terminal command MVA (reference section 7.7.4).

5.4.4.7 Detector Fault Monitor (DFM)

The detector has a fault monitor function. In the default mode, the detector will generate a

fault output (equivalent to a permanent detect) if the detector has not registered an

activation for a period of twenty hours.

This duration can be adjusted to a user defined value by setting DIP Switch 7 to ‘1’ (On)

and then using the terminal command DFM (reference section 7.7.4).