ABB REF542plus 1 feeder terminal

ABB REF542plus 1 feeder terminal 

ABB REF542plus 1 Some of the commonly used measures to improve the reliability of the software structure include: digital filtering and industrial frequency plastic sampling, which can effectively eliminate periodic interference; timed correction of the reference point potential and the use of dynamic zero, which prevents potential drift; the use of information redundancy technology, the design of the corresponding software flag bits; the use of indirect jumps, set software protection and so on.

ABB REF542plus 1 Correctly select the grounding point and improve the grounding system. The purpose of grounding is usually two, one for safety, the second is to inhibit interference. Perfect grounding system is one of the important measures for PLC control system to resist electromagnetic interference.

ABB REF542plus 1 system grounding has a floating ground, direct grounding and capacitive grounding in three ways. For PLC control system, it is a high-speed low-level control device, should be used directly grounded. Due to the signal cable distribution capacitance and input device filtering and other effects, the signal exchange frequency between the device is generally lower than 1MHz, so the PLC control system grounding line using a point of grounding and a series of a point of grounding.