A comprehensive analysis of the PLC ladder diagram programming process-EEWORLD

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1. The number of times the PLC internal software contacts can be used is unlimited.

2. Each branch of the ladder diagram should be drawn from left to right with the left busbar as the starting point. The front of each line is the working condition composed of the contact group, and the rightmost is the working result expressed by the coil or function box, that is, the contact cannot be placed on the rightmost side of the coil.

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