Here’s an interesting, technically focused review of a issue where a “bytes missing” error was fixed—written from the perspective of a power systems engineer or SCADA integrator who encountered the problem in a real-world deployment.
Add a or Inter-character delay (50ms–100ms) to allow the device more time to process the request. 3. Physical Layer and Hardware Issues modbus poll bytes missing error fixed
The developers behind Modbus Poll have listened. Starting from version (released late 2023), a new option "Robust mode for broken slaves" was introduced. Here’s an interesting, technically focused review of a
If you’re working with —the popular Modbus master simulator from ModbusTools —nothing is more frustrating than seeing the "Insufficient bytes received" or "Bytes missing" error. This error essentially means that the master (your PC) received a response that was smaller than what the protocol required or what you requested. Physical Layer and Hardware Issues The developers behind
Modbus Poll allows an "inter-frame delay" (silence between requests). If this is set too low, the slave may still be processing the previous request and respond slowly, truncating its own transmission.
If all parameters match and the physical wiring is sound, the issue may be specific to the software environment.
If you're still troubleshooting your Modbus network and need help narrowing down the issue, let me know: Is your setup (Serial) or Modbus TCP (Ethernet)?