In Modbus Poll, go to Display > Communication or View > Log . The log will show:
: A mismatch in baud rate, parity, or stop bits can cause framing errors where bytes are misinterpreted or dropped. modbus poll bytes missing error fixed
: In half-duplex RS-485, the master might "hear" its own request, confusing its byte count. : In Modbus Poll, check the "Remove Echo" In Modbus Poll, go to Display > Communication
Imagine this: You’ve configured your RTU (Remote Terminal Unit), wired the RS485 cables, set the baud rate to 9600, and hit "Connect." Instead of flowing data, the screen flashes a cryptic red error: "Modbus Poll: Bytes Missing." In Modbus Poll
This is perhaps the most common reason for this specific error when using Ethernet gateways.