This lesson continues the discussion on about modifying the values of various datatypes in a watch table. This lesson will discuss the different types of permissible values for the different datatypes that you may encounter within the watch table. We indicate to you how to pull up a helpful menu that shows you the format required for specific datatypes. Let’s continue the instruction on modifying values by opening this lesson.
In several previous lessons we have been discussing modifying the values of various datatypes in a watch table. In this lesson we will introduce you to forcing. Forcing is similar to modifying with some subtle differences. One of those differences is when input or output addresses are forced, the...
In this lesson we will describe the difference between modifying addresses and forcing them. This lesson discusses what happens with either of these functions when the PLC power is turned off or when you are connected with your computer and you disconnect. The force function has an external indic...
In previous lessons we have discussed the Process Image Input or PII and its purpose. In this lesson we discuss the size of the PII and what will be required of you to know, as the programmer, when it comes to being able to access your I/O when the boundary of the PII is exceeded. Each PLC has a ...
2 Comments