PLC logic outputs

On one staircase you can have the number of exits. If you have more than one. This will be AND logic or OR logic. Series or parallel. I am trying to make six light flashes using a timer on delay instructions with a closed input instruction. I will use the Allen Bradley SLC 500 PLC.

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A ladder logical chain can have as many outputs (OTE) as possible, both on the right side of the logical line and even in the middle of the logical line.

Each output is controlled only by logic leading to it. If you have several outputs at the same point in the chain, all of them will have an output that reflects the logical condition from the start of the launch to this point. This is a common method used to control multiple outputs of the same signal simultaneously.

If you have several outputs at different points in the step, each will have outputs that correspond to the logic leading to this conclusion. The logic downstream of the OTE acts as if the OTE was not present.

Now you can have complex devices (for example, a timer) controlled by logic within a step. Obviouosly, further logic that depends on the output of a complex device (e .., Timer Done), will not be independent of the behavior of the complex device. But, like OTE, you can have many complex devices in the chain.

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Source: https://habr.com/ru/post/1724203/


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