Functions and their Configuration
INSYS GSM 4.2
INSYS GSM 4.2 compact
62
Sep-06
6.3
Alarm Functionality
The INSYS GSM has two independent digital inputs for alarm detection.
Alarms are triggered by connecting an alarm input to ground. The alarm input is on HIGH
potential by a pull-up resistor in open state. During an alarm, the INSYS GSM can send an
alarm message or activate the pertinent switch output.
6.3.1
Querying the alarm inputs
You can query the state of the alarm inputs via AT commands, SMS or DTMF.
AT command
Enter the command
AT**IN?
via a terminal program or the HSComm terminal window.
The AT command will send the following response:
OPEN
Not activated, open
CLOSE
Activated, connected to ground
SMS query
The automatic processing of SMS messages must be enabled (see Chapter Automatic
SMS processing).
DTMF query
The processing of DTMF tones must be enabled (see Chapter DTMF tone processing).
6.3.2
Alarm types
Each of the two alarm inputs can be configured either as simple alarm input or als pulse
input. This results in two different alarm inputs:
¾
Simple alarm
¾
Pulse alarm
The characteristics and configuration of the alarms are described in the following.
Summary of Contents for GSM 4.2 Compact
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