User manual

Getting Started and Tutorial
2373_en_B PHOENIX CONTACT 2-17
Example 2: Auto-Mode Flow Charts that Control by Following Process Needs
This example shows two flow charts that control a project by monitoring when something
needs to be done and then does it.
The first flow chart (see Figure 2-12) stays in a current action (raising tank temperature,
starting the agitation cycle, and adding of catalyst) until that action is done. Therefore, any
remaining actions cannot be attempted until the one above it is done. When the last action
is taken care of, flow then goes back to the top to see if it’s still “Okay to Run” the process.
It also checks to see if a user has pressed “Emergency Stop”.
Figure 2-12 Tank control example one