Are you using a or a Modbus TCP gateway for this setup?
On long RS-485 runs, you must have a 120-ohm resistor at both ends of the bus to prevent signal reflection. Without these, bits get "smeared," and the software interprets them as missing data. modbus poll bytes missing error fixed
Ensure the Master and Slave are identical (e.g., 9600). Are you using a or a Modbus TCP gateway for this setup
This error essentially means your Modbus Master (like Modbus Poll software) expected a specific number of bytes based on the Modbus protocol but received fewer than required or none at all. Ensure the Master and Slave are identical (e
Don't poll too fast. If your scan rate is 100ms but the device takes 200ms to respond, the packets will collide. 6. Eliminate EMI (Electromagnetic Interference)
Increase this from the default (usually 1000ms) to 3000ms to see if the error clears.