PLC programming skills and case analysis

Using PLC controller programming, to reduce the number article instruction, save memory and improve the running speed, should grasp the following programming skills. ( 1) The series contact more circuit at the top, as shown in figure 8 4, the visible ( b） Form to reduce using the ORB instructions or multiple output, etc. ( 2) Parallel contact more circuit on the left, as shown in figure 8 Visible, as is shown in ( b） Form to reduce using ANB commands. ( 3) Series multiple output circuit, it is best to contact more circuit on the bottom, as shown in figure 8 6, can not use MPS and MPP instructions, etc. ( 4) If the circuit is complex, use the instructions such as ANB, ORB implementation is difficult, you can reuse some contact to equivalent circuit, programming, as shown in figure 8 7.
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