In this lesson we are going to discuss a method to change the status of an input address. As we’ve discussed previously, the CPU first scans the inputs and puts the statuses or values within a memory area in the PLC. The scan then solves the logic based on the input statuses. And finally, the CPU sets the outputs. On some occasions you may have an input that is not yet functioning and you may want to temporarily change the status of that input in order to determine if the logic solves as intended. We’re going to show you how to do that in this lesson as well as status change time frame options such as permanent change, only once, etc. Open up this lesson to find out how to accomplish this.
In the previous lesson we refreshed your memory on a CPU scan cycle. We then discussed the basics for modifying the status of an input address. We also discussed the different options of modification. In this lesson we are going to discuss the modification option of “at the end of the scan cycle”...
In the last few lessons we have been discussing how to modify the value of inputs. In this lesson, we are going to describe how to do the same for outputs. As you may recall, there are different modification selections and we will describe which one to select for the particular outcome you desi...
This lesson continues the discussion on how to modify the value of inputs and outputs. We are going to discuss the option of “at transition to stop”. As somewhat described by the name, this option will modify the value when the CPU transitions to stop mode. Let’s take a look at this lesson and se...
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