The error generated by the PLC scan

The error generated by the PLC scan
To decide everything in the digital era, all of the CPU clock.
Still have to go through the CPU computing, and then output the results.


A relatively simple

- | X0 | ------- (Y0) -
X0 trigger Y0 output.
General requirements, we know that it is immediately output.
If high-speed machines, in fact, has been delayed for a scan time of about (10 ~ 20ms).

The output contacts are usually the end of the scan will be output.



For example:
Machine speed of 80 m / min, 10ms difference of about 13mm.

General photoelectric sensors, sensor response time, about ns level.