ID-Mobile Global Guide
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5.1.6 Modbus protocol
Direct connection: RS485
Modem connection
9600, 19200 or 38400 bps, 57600 (8 data bits, 1 stop bit, no parity)
Transfer mode RTU
Function 3 (Read Multiply Registers)
Function 6 (Write Single Register)
Function 16 (Write Multiply Registers)
The response to an incoming message is sent with minimum 4.096 ms delay after message reception
The complete description of Modbus communication protocol can be found in Modbus Protocol Reference
Guide PI-MBUS-300 and Open Modbus Specification Release 1.0. Both documents are available from web site
at
.
Modbus Multipack message
It is special communication object that contains all values that are used for History record (configurable) and
can be read by one command.
Note:
Detail Modbus command description see in ComAp Communication guide.
5.1.7 AirGate and WebSupervisor support
ID-Mobile-controller with ID-Mobile GPRS modem supports the AirGate and WebSupervisor system. This
system enables engines fleet management as well as position monitoring (in conjunction with ID-Mobile GPS.
For more details on WebSupervisor kindly visit
.
AirGate technology serves for easy plug’n’play communication over Internet. It overcomes problems with fixed
and public IP address necessity, with firewalls and difficult communication settings.
