In previous lessons we discussed the Process Image Input or PII, its purpose, size, and what happens when exceeded. We wrote a simple move instruction to demonstrate the PII boundary and faulted the PLC, diagnosed that fault, and found out how we need to handle our I/O when our PII boundary is exceeded. In this lesson, we are going to discuss how to change the default address of an analog input card to allow it to fit within the PII boundary, and although not a common practice, change the PII boundary when allowed by certain CPU’s. Open this lesson to see how we are going to accomplish this task.
For the last few lessons we have been discussing the Process Image Input or PII and using it within your PLC programs. We are continuing to educate on this topic by discussing the Process Image Output or PIQ. Just as we instructed previously the purpose, size, and boundary, we will inform the sam...
In a continuation of our discussions about the Process Image Input or PII and the Process Image Output or PIQ, this lesson is going to inform about the ability to force these peripheral objects. Previously we had opened a table to facilitate our testing and in this lesson, we’ll expand the table ...
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