11. VARIABLES
The GSM Commander supports 16 variables* (A,B...P), whose values can each go up to about 16
million (24bits). These variables can be incremented, decremented and otherwise manipulated via
behaviour statements. The value of a variable can be sent via SMS, and can also be used to trigger
another statement. It is important to note that these variables are volatile, in that their values will
be reset to zero when the device loses power.
If you are using an Analog Expansion unit with Your GSM Commander, the analog values (extended
inputs 1-8) will be populated into variables A-H automatically.
By default, these values are in millivolts or microamps, depending on what range has been selected
on the Analog Expansion unit. When the analog values arrive from the Analog Expansion unit the GSM
Commander can be configured to apply a scaling factor to each variable, and these are set up under
the “Analog Scaling” tab. This allows you to set the device up such that the variable contains a real-
world unit of measure.
* Only available on the 0641 and 1281 models
12. TIMED OPERATIONS
The GSM Commander supports time constraints, which can be setup for any statement. Time
constraints will prevent a statement from triggering outside of the preselected times and days of the
week. The GSM Commander can also be configured to trigger a statement at a certain time on a
certain date or group of days.
The current time and date can be set in one of two ways, either by SMS or by clicking on the tab
“Set to PC time”
in the software interface under the
“Status Tab”
.
By means of SMS you would send a special SMS message to the GSM Commander, containing the text:
“SETTIME”
.
The cellular network supplies the time and date with any message that is sent, and the
GSM Commander sets its own time according to this.
Please Note:
The GSM Commander will lose its time if power is removed, and no battery backup is
used. Upon power-up, if any statement has a time constraint enabled, the GSM Commander will
automatically send a message to the first number in the list, requesting a
“SETTIME
” reply so that
it can set its time. This message will be sent a maximum of 3 times.
By entering a capital letter
N
in the special settings of the SmartSetup software (and saving it to
device), it will request the time from the network. If available, it will update the time on startup.
There is also an
L
option as well, this will get the time on periodic GSM option selected (for example
at Noon or Midnight).
The GSM Commander will not allow any time constrained or time-based statement to trigger if the
time has not yet been set.
© Polygon Technologies. All rights reserved
Page 41