This error means the slave device started to send a response, but the data packet was cut short, corrupted, or took too long to arrive. The master (Modbus Poll) expected a specific number of bytes based on the Modbus protocol rules but simply didn't get them.
Partial data, timeouts, or repeated retries. modbus poll bytes missing error fixed
In RS-485 communication, "Bytes Missing" often means data corruption due to electrical noise or poor wiring. This error means the slave device started to
Disconnect the slave device and short the TX+ and RX- pins on your RS485 converter. Send a Modbus request. If you receive an echo, your serial port and cable are fine. If not, the issue is hardware-related. or repeated retries. In RS-485 communication
The investigation revealed that the issue was caused by a combination of factors: