I am using an ASCII object to display a string message from an AB Compactlogix PLC. When the string message changes to one with less characters, the ASCII object is holding characters from the previous message. I have even tried setting up a routine in the PLC to send an entirely blank string to the HMI in order to clear the display, but it does not work.
Hi @jnorris,
What is the value of your LEN tag when the text change takes effect? Does the LEN tag still reflect the previous STRING length?
Thank you for the reply, that got me looking in the right spot. The LEN value was showing 0, but when I monitored the actual elements of the DATA array there were still characters in there. So I modified my COP instruction to make sure I was overwritting the entire structure with a blank string element, and viola it worked!
We are happy to hear that this issue is resolved, thank you for the update!