Insys GSM 4.2 Compact 11-02-01-03-04.002 Manuale Utente

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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.