I am currently using a HMI to set the time in a TP block and using the ET to show the value of the time elapsed on the HMI. How do I configure this value to show the time remaining? Any thoughts would be appreciated, thank you.
Will I need to store the value from PT and ET rather than just declaring the tags from the HMI to do the calculation as I cannot access PT and ET values in the calculation block inputs
Will I need to store the value from PT and ET rather than just declaring the tags from the HMI to do the calculation as I cannot access PT and ET values in the calculation block inputs
that would be odd.
how come you cannot access?
do you mean calculation block as code block in LAD?
but then why would you use calculation block from simple SUB operation...