Design of anti-interference about the programmable control system under the industrial scene

The main interference sources and cause are analyzed about programmable control system under industrial field. The anti-interference methods and measures of the programmable control system are improved from the hardware design and software programming, including power optimization, selection and laying of cables, anti-wrong of I / O signals and timer control of sampling, filtering input counter jitter, setting the watchdog. The practice proves that the anti-interference effect is obvious.