Specifications

Siemens Mobility, Traffic Solutions

Sopers Lane, Poole, Dorset

BH17 7ER

Version 10 Page 98 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

8.4 Fault Log

8.4.1 Introduction

The detector’s fault log holds all the faults that are currently active.

When the detector finds a fault, it sets the associated fault flag (normally to the non-zero

value of 255) and may also set additional fault log data bytes.

In addition to the above fault log, which holds the currently active faults, the detector

also contains an historic rolling log which records the elapsed time (in years, days and

hours) that various events occurred since the unit was first powered-up. This will

provide an approximate indication of the time and date that the event may have

occurred.

8.4.2 Viewing the Fault Log

To display the currently active fault flags, enter ‘FFS or FDS’, and for the fault data,

enter ‘FLD’.

The ‘+’ and ‘-’ keys can then be used to scroll through the active faults.

The FFS command provides a listing of all the possible detector faults with an indication

if the fault is active or not. The ‘+’ and ‘-‘ keys can be used to step through this array.

The FDS command provides a selective view of the Fault Log, only presenting faults

that are currently active. Again the ‘+’ and ‘-‘ keys can be used to step through this

display.

8.4.3 Clearing the Fault Log

Entering ‘RFL=1’ will reset the fault log of any active faults that are able to be cleared.

Note: The historic rolling log is not cleared by entering RFL=1. However there will

be an entry in the historic log indicating that the RFL command has been

invoked.

This command should only be used after each fault log entry has been investigated.

After the RFL command has been invoked the output will indicate ‘RFL: 0’. This

indicated that all fault status flags have been set to zero (0). However, if the LED is not

extinguished, then the fault(s) may not have cleared. Further investigation may be

required to ascertain if a fault is still active.