Allen-Bradley Logix5000 Reference Manual page 641

Debug Instructions (BPT, TPT) Chapter 20
Example:
This rung triggers a trace of three analog values when any one of them exceeds a
given value (30.01).
You want to display the tracepoint information in the Format string (myformat).
In this case, the format string contains this text:
Analog inputs trace:Analog inputs = %f, %f, and %f
When the tracepoint triggers, the characters before the colon ('Analog inputs
trace') appear in the title bar of the trace window. The other characters make up
the traces. In this example, %f represents the tags to be traced ('analogvalue1, '
'analogvalue2, ' and 'analogvalue3').
The resulting traces appear as shown here.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011 641