Rockwell Automation Logix5000 Logix5000 Controllers Quick Start - Manual (Page 85)

Publication 1756-QS001E-EN-P - October 2009 85
Program a Project Offline Chapter 5
Browse For an Instruction
1. Press Alt + Insert.
2. Type the mnemonic for the instruction and press Enter.
Write BOOL expressions as either true or
false Use a BOOL expression to determine if specific conditions are true (1) or false (0).
• A BOOL tag is already true (1) or false (0). Do not use an “=” sign to check its state.
This is OK This is NOT OK
If Bool1 … If Bool1 = 1 …
If Not(Bool2) … If Bool2 = 0 …
• To check an integer, REAL, or string, make a comparison (=, <, <=, >, >=, <>).
This is OK This is NOT OK
If Dint1 > 5 … If Dint1 …
For an assignment, start with the
destination. Write an assignment as follows:
Destination := Source;
Guideline Description
data