Lock ACIA Settings
Lock the ACIA settings in the M850 meter.
A few seconds after being connected to a live Modbus network, the meter will configure itself to the network’s settings. i.e. baud rate, parity, stop bits.

If the meter detects 5 consecutive framing errors, it will start to search using different parity settings until the errors stop.
If the meter detects 5 consecutive CRC errors, it will start to search using different baud rate settings until the errors stop.

To prevent unnecessary hunting the settings can be locked into the EEPROM and will always be used unless they are unlocked again.

Sample Coding
Slave Address = 1
Writing To 4X Registers - code 16 (10 hex)

Message Packet To SLAVE
01 10 00 60 00 02 04 46 A3 50 00 2C ED
N.B. 46 A3 50 00 = 20904

Response Packet From SLAVE
01 10 00 60 00 02 41 D6