OPC-UA AB ST Data file problem

Ignition
1

ST files from the PLC5 driver do not display correctly with a null value in the string. Sometimes they will show nothing. For example:

PLC string- 234036X01A01\00 -- this will not display the last value of "1", I am guessing because of the "\00" null. Sometimes this value will just show "null"

2

Anyone had a chance to look into this?

3

I am able to reproduce the same problem here, but I haven’t had a chance to fix it. I will have it fixed early next week.

4

Thanks, let me know when you have it done

5

Ok, it is fixed in 7.1.4 that is on the download page of our website.

6

Ok the null problem is fixed, but there is something stange. I have several string file tags. Any string tag that is referenced to “3” will not read the data. For example ST80:3, ST81:3, ST60:3, etc. ST80:2 will display fine. Have not tried all combinations, only know that “3” will not work for any file. If you put ST60:3.STR it will display, but I don’t have to specify this for the others.

7

Just for an update on this issue. The problem applies to SLC, MicroLogix and SLC processors and has been resolved in version 7.1.4

8

For David and I, it was not in a SLC, it was a PLC5