Hello all,
I am stumped about how to validate an expression in order to meeting the following conditions. Here's what I want to do: I have a solenoid gate valve that has two limit switches indicating that it is open or closed. If any limit switch fails to make open or close, I want the operator to see a "N/A" on the string display.
I created three (3) STRING tags in my Logix5000 program:
A) Closed_String (Closed)
B) Open_String (Open)
C) NA_String (N/A)
I created three outputs that I will use to give feedback indication of the limit switches:
A) Gate_Selection_1.0 (Open)
B) Gate_Selection_1.1 (Closed)
C) NA (N/A)
See attached pic for logic.
Can anyone give me some clues as to how I can create a string display in FTVS showing OPEN, CLOSED, N/A based on which output is true?
I am stumped about how to validate an expression in order to meeting the following conditions. Here's what I want to do: I have a solenoid gate valve that has two limit switches indicating that it is open or closed. If any limit switch fails to make open or close, I want the operator to see a "N/A" on the string display.
I created three (3) STRING tags in my Logix5000 program:
A) Closed_String (Closed)
B) Open_String (Open)
C) NA_String (N/A)
I created three outputs that I will use to give feedback indication of the limit switches:
A) Gate_Selection_1.0 (Open)
B) Gate_Selection_1.1 (Closed)
C) NA (N/A)
See attached pic for logic.
Can anyone give me some clues as to how I can create a string display in FTVS showing OPEN, CLOSED, N/A based on which output is true?