Omron FH Series User Manual page 514

11 What to Do!
Although an error message such as the following, is not displayed, the ERROR signal and the ERR
indicator will turn ON.
The STEP signal was input when the
READY signal was turned OFF.
A non-existing parallel command was en-
tered.
11 - 8
Cause
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•
Notes:
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Troubleshooting
Input the STEP signal after the READY signal turns ON.
Noise is superimposed onto the STEP signal. Keep PLC and
FH series/FHV series Sensor Controller away from the noise
source.
EtherCAT and EtherNet/IP error signals are not turned on.
Please enter a correct parallel command.
FH/FHV Series Vision System User's Manual (Z365-E1)