Specifications

Siemens Mobility, Traffic Solutions

Sopers Lane, Poole, Dorset

BH17 7ER

Version 10 Page 35 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

4.8.2 Terminal Interface

All Heimdall detectors are equipped with a terminal interface that will enable the unit to be

configured with a terminal interface. The use of a terminal interface cable is required.

Access to the terminal interface is gained by removal of the side access door. This comes

with a ‘built-in’ retention mechanism to prevent it falling to the ground when removed from

the body. Before removal, make a note of the cover’s orientation and ensure it is replaced

the same way round (refer to appropriate detector specification (section 5) for

orientation).

4.8.3 Priority of configuration

Since the detector can be configured using the DIP switches, terminal interface and/or

the SiTOS there is a hierarchy which is defined as follows;

If the Digital Processor board dip switch SW8 is set to ‘0’ –

 DIP switches SW1 to SW7 have full control of the detector configuration settings.

 The terminal handset has no write access, with the exceptions where the DIP

switch settings allows for terminal settings to be applied. However the user

Terminal will have full read access.

 SiTOS has no write or read access.

If the Digital Processor board dip switch SW8 is set to ‘1’ –

 SiTOS has full configuration with both read and write access.

 The settings of dip switches SW1 to SW7 are ignored.

 User Terminal will normally not have any write access.

The exception is the command SME=249 (override command). This has the effect of

temporarily disabling SiTOS access and allowing the terminal to have full write access to

the configuration setting. The temporary period will terminate after 20 minutes of terminal

inactivity.

If SW8 is set to 1, but a SiTOS is not connected, then the (wireless) user terminal will

have full write and read access. The situation occurs since an unconnected SiTOS will

not overwrite the setting applied by the terminal handset.