Special Modbus Registers

Mikrodev Devices have MODBUS registers which you could set some special parameters. You can find these special registers in the following table. Please note that the values you set via MODBUS will be saved into retentive memory once every 5 minutes for security purposes. After setting the parameter via MODBUS, if you power off the device earlier than 5 minutes, the changes may be lost.

If you need to set a value and make it retentive immediately you need to use AT Commands via USB connection.