Description
ABB PFV1401 Internal Logic Circuit
The ground of the PFV1401 control system includes system ground, shielded ground, AC ground and protection ground. Distribution of ground potential interference is mainly the uneven distribution of the potential of each ground point, there is a ground potential difference between different ground points, which caused the ground loop current, the current may produce unequal potential distribution on the ground line, affecting the normal operation of logic circuits and analog circuits within the PLC.
As the PFV1401 works with a low logic voltage interference tolerance, the distribution of logic ground potential interference is likely to affect the PLC’s logic operations and data storage, resulting in data confusion, program runaway or crash. The distribution of analog ground potential will lead to a decline in measurement accuracy, causing serious distortion of the signal measurement and control and false operation.
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