Insys GPRS 5.0 serial 11-02-01-03-10.014 Manuale Utente

Information Regarding GPRS 

 

INSYS GPRS 5.0 serial 

 

64

 

 

Mai 06

 

8.8.1.1  Design of the entire system 
 

Application

i-modul

GPRS 3.0

RS232

GSM/GPRS-net

Internet

modem / dsl

long-distance

data

connection

INSYS

virtual
COM-

Port

control centre

software

control centre

 

 
The system consists of a data logger with 8 digital inputs and 4 analogue inputs. The re-
ceived data can be output in adjustable intervals at the RS232 interface. 
The evaluation software at the control center computer will either communicate directly 
with the data logger via the RS232 interface, or via leased line modems for remote appli-
cations. 
To save investment and maintenance costs (rent ...) when using leased line modems, the 
connection should be made via a transparent GPRS modem. 
In this case, the INSYS GPRS 5.0 serial is used. It is also used for leased line operation, i.e. 
after being switched on it will automatically attempt to establish a connection with the 
remote terminal, the INSYS virtual COM port. As soon as the connection is established, all 
user data from and to the data logger are transmitted via a transparent TCP/IP connec-
tion. No adjustment is required for the data logger and the control center computer. 
 

8.8.1.2  Data logger user data 
A data logger message has the following setup: 
Device 

ID 

   

   4 

byte 

2 x 8 bit for the digital inputs  

 

 

2 byte 

4 x 16 bit for the analogue inputs   

 

8 byte 

Checksum 

     1 

byte 

Total   

 

 

 

 

 

15 byte 

 

8.8.1.3  User data acknowledge of the control center 
As an option, the data logger/control center software can be configured so that for a 
data logger message an acknowledging message of the control center (user data ac-
knowledge) is sent.