Modbus Poll Bytes Missing Error Fixed _verified_

Her breakthrough came when she added timestamps to the sniffer’s capture. The missing bytes always coincided with short spikes on the bus — micro-interruptions lasting fractions of a millisecond. Not long enough to break the physical signal visibly, but enough to clip a few bytes from the frame.

If your cable is running next to a Variable Frequency Drive (VFD) or a heavy motor, EMI can "chop" the end of your data packet. modbus poll bytes missing error fixed

She first assumed the usual culprits: noisy wiring, mismatched baud rates, or a misbehaving slave. She traced the RS-485 bus physically, tapped terminations, swapped cables. She verified baud, parity, and stop bits. Devices replied when polled manually, and the offending slave answered correctly under bench tests. The problem persisted. Her breakthrough came when she added timestamps to