Hi all,

Please can some one help me i want to convert the j1939 parameters so that i can send them through the modbus setup as i have a modem connected to my screen and have setup a webserver that i would like to read my displays info from

Or if you know of a J1939 modem that will be able to communicate over satelite since we dont always have signal everywere were the vehicles are working. I have 8 PV450's that i want to connect up and hopefully you guys can help me with a answer so that the screens can meet our clients needs as they would like to track the vehicles and also see what is going on with the parameters on the vehicle.

Marcell,

There are also modems that transmit CAN data (from Antx for example www.antx.com) and there are modems that communicate over the globalstar statelite system (http://www.globalstar.com/en/index.php?cid=1310)

To convert J1939 variable to modbus use the modbus setup screen under the environment tab.

If for example the display is a modbus slave do the following in the Environment Setup tab:

1. Setup serial port as a modbus RTU slave
2. In the Local Modbus Slave, click the + button
3. In the pop up select you address for your modbus register and pick your data type (typically holding and unsigned short). Select OK
4. UNCHECK the autocreate check box.
5. Click on the (Not Mapped - Disabled) link
6. Choose a J1939 variable

Now a mobus register is mapped to a j1939 data variable.

Hi All, I have got a modem that i am currently using with the PV450 which displays all the info i want displayed on the internet all it is is a modbus rs485 master modem with gprs and gps and it works on a webserver which per device you need to by a yearly subsciption.

What make and model of modem are you using?

a netbiter ec250