Specifications

RailCorp Engineering Manual — Signals — Equipment Manual

Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261

Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1

*BATTERY =B 11.7 0.16 8 6.0 1.0

6.1.2.12 Analogue expression

A analogue expression is used to configure analogue inputs for general purpose logging.

It details the type of measurement the analogue channel is being used for, its channel

number, the scale for the input, and the percentage change to log.

Analogue expressions have the following format:

*x =A A B C D

where

*x is the name used for the analogue channel.

=A identifies that it is an Analogue expression.

A is the analogue channel number for the this expression.

B is the type of measurement the analogue channel is being used for. This is VOLTS for

voltage measurements, AMPS for current measurements, and TEMP for temperature

measurements.

C is the scale factor used for displaying the measure value. The measured value is

scaled so that it is in the range of 0 to the scale number. The scale number must be in the

range of 1 to 255. Typically it will be 5, 20, 50, or 100.

D is the percentage change required between the current measured value and the

previously measured value for the current value to be logged. This must be in the range

of 2 to 50 percent.

Examples of Analogue Expressions are:

*VOLTAGE =A 5 VOLTS 5 2%

*CURRENT =A 6 AMPS 20 3%

*TEMPERATURE =A 7 TEMP 100 5%

6.1.3 Variable configuration data

Configurable items that can be changed during normal operation and their purpose are

detailed in this section. These values are set during Commissioning and are checked by

the Control Centre during either a Status check, or a Battery test.

These settings can be inspected using the Get information and status, Get serial port

configuration, Get Lamp offsets commands.

Level Crossing Name 39 characters which identify the Level Crossing. Normally

Placename, Streetname St.

Date & Time The current date and time.

Number Monitor Dials 19 characters which give the normal phone number in

Hayes AT command format, that the monitor dials to

report a status change. These are the digits 0 to 9, and

dial modifiers ‘,’ for a pause, ‘P’ for pulse dialling, and ‘T’

for tone dialling. It is recommended to always start the

number with a pause.