Collecting MODBUS data offline with FMC125?

[heinburgh]

Hello forum,

I’m collecting RS485 data from a Modbus RTU device. The location has poor cellular signal and I’m wondering if there is any way to collect the Modbus data and add the two bytes of data I need to the AVL packets for upload when cell signal returns?

[Maryam]

Hello,

Since the device don’t have support Modbus protocol in the firmware level so the data which receive through RS485 doesn’t support sending over AVL ID.

However, if you can create and decode the modbus commands and responses on the server, then Modbus can be used with the device.

For offline data, if the device lacks GPRS to send command for a response, it will not receive any data from the Modbus device, so it’s not possible to save the data in flash memory.

Please access the link for more details Modbus slave integration with FMX125/FMX640 - Wiki Knowledge Base | Teltonika GPS

Regards
Maryam