Rockwell Automation 57C650 AutoMax Programming Executive Version 3.8 - Manual (Page 195)

18Ć7 On Line Menu: Monitoring and Editing Tasks
18.1.6 Modifying a Variable
WARNING
DEPENDING ON THE APPLICATION, THE USE OF THE TUNE FUNCTION MAY
RESULT IN INSTABILITY OF THE APPLICATION PROCESS. IT IS THE
RESPONSIBILITY OF THE USER TO DETERMINE THE POTENTIAL HAZARDS
INVOLVED. FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN
BODILY INJURY.
WARNING
THE SET AND FORCE FUNCTIONS BYPASS CONTROL OF THE APPLICATION
PROCESS BY THE APPLICATION TASKS. IT IS THE RESPONSIBILITY OF THE
USER TO DETERMINE THE POTENTIAL HAZARDS INVOLVED. FAILURE TO
OBSERVE THESE PRECAUTIONS COULD RESULT IN BODILY INJURY.
WARNING
VARIABLES AND OUTPUTS WHICH ARE FORCED BEFORE AC POWER IS LOST
WILL REMAIN FORCED WHEN AC POWER IS RESTORED. SHOULD AC POWER
BE LOST WHILE VARIABLES ARE FORCED, THE USER MUST ENSURE THAT
UNEXPECTED MACHINE MOVEMENT DOES NOT OCCUR WHEN AC POWER IS
RESTORED. FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN
BODILY INJURY.
Selecting M" for Modify from the Monitor Variable menu allows you
to set, tune, force, or unforce a variable. Set allows you to set a
variable to a specified value. Note carefully that if application tasks
are running, the value that you write may be overwritten by one of
those tasks. Tune allows you to increment or decrement a tunable
variable (defined as such in the application task) within its limits.
Force allows you to force a variable to a value that is unaffected by
any other action in application tasks or the state of physical I/O.
Unforce returns a variable to the nonĆforced state.
Recall that to use any of these options, with the exception of tuning a
variable, the keyswitch must be in PROGRAM and the password
must be entered. See figure 18.4 for the Monitor Variable Modify
menu.