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RailCorp Engineering Manual — Signals — Equipment Manual
Cerberus Level Crossing Monitor Field Equipment Manual
*BATTERY
6.1.2.12
TMG E1261
=B 11.7 0.16 8 6.0 1.0
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.
© RailCorp
Issued August 2012
UNCONTROLLED WHEN PRINTED
Page 71 of 89
Version 2.1