23
Also if the SetupUserList is enabled the user must send the command with the
authorization code from that specific number listed in the SetupUserList. But be
aware that if there is no SetupPassword enabled, then it doesn’t matter if
SetupUserList has a phone number because the user can send the command from
any phone and change the setup of the GPRS modem.
This functionality was setup for a user that couldn’t communicate with the GPRS
over VPN or Public IP. It gives the user the almost the same abilities as if he or
she were using the master station to communicate to the GPRS modem.
Selecting Data for Transmission with the GPRS block
Sensor data can be tagged for transmission in two ways using either the Graphical Setup,
or the EzSetup. The properties are the same, whether you are working in the Graphical
Setup or EzSetup.
Using the Graphical Setup, you need to attach a GPRS block (found under the Telemetry
category) to an output you’d like to have transmitted, and then configure the block.
Here’s an example of the order we suggest that the blocks be created and connected
together:
Figure 10: GPRS block in Graphical Setup
In the setup depicted above, the GPRS block tags a measured data point, that of, Air
Temp (AT). Here are some important notes about the setup:
The GPRS block appears after Alarm block. This ensures the GPRS block “sees”
the result of the alarm evaluation, triggering alarm transmissions, if needed. Of
course, the Alarm block is only required if your system will evaluate data for
Alarm and/or alarm transmissions.
The GPRS block appears before the ComsTag block. This ensures the ComsTag
“sees” the alarm transmission status generated by the Alarm and GPRS blocks.
The ComsTag block is required for SSP telemetry, but even when not using the
SSP format it allows the value to be displayed on the Data tab and/or accessed via
the command prompt and SMS commands.
Alarm Block Properties
The Alarm block is a standard block used to define high limits, low limits, and rate of
change. The block is discussed in detail in the Xpert manual, but one interesting feature
to note is that Alarm blocks may be stringed together to handle multiple conditions.