Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 306)

DĆ4
D.3 Using the PreĆDefined Ladder Execution Time
Variables
Use the following double integer parameters to help you check and monitor the
program's execution time. Only use these variables as input parameters.
D task_usec_max Use this variable to monitor the maximum execution time (in µ s) for the
current program. When this variable is defined in a ladder program.
D task_usec_now Use this variable to monitor the latest execution time (in µ s) of the current
program.
When this variable is defined in a ladder program. The execution time is
the real clock" time it took the program to run from start to finish. It inĆ
cludes the execution time for higher priority programs and interrupt serĆ
vice routines if they run while your program is running.
To reset these times, write a value of 0 into the variable.