How does an analog input exceed its maximum?

[Steve_McLain]

Lookout 5.1

Modicon PLC

Nitrate Analyzer

Conductivity Analyzer

Level Transmitters

Occasionally I'll have an analog signal in Modbus, i.e. F400302, formatted 0-32767 with engineering units set from 0-50 or 0-2000 or 0-3 and it exceeds that maximum sometimes by three to five times.  I didn't think that was possible.  Any ideas?

[Steve_McLain]

Disregard this thread.  It's a PLC thing, not Lookout.  I don't have any scaling.