Rockwell Automation 1794-Lxxxx PhaseManager - Manual (Page 27)

Publication LOGIX-UM001B-EN-P - April 2010 27
Guidelines Chapter 3
Start with the initial state and work
through the model. Start with the initial state. Then work forward from that point. Use the following questions to
help you.
For this State Ask
Stopped What happens when you turn on power?
Resetting How does the equipment get ready to run?
Idle How do you tell that the equipment is ready to run?
Running What does the equipment do to make product?
Holding How does the equipment pause without making scrap?
Held How do you tell if the equipment is safely paused?
Restarting How does the equipment resume production after a pause?
Complete How do you tell when the equipment is done with what it had to do?
Stopping What happens during an normal shutdown?
Aborting How does the equipment shutdown if a fault or failure happens?
Aborted How do you tell if the equipment is safely shutdown?
Use only the states that you want. Define only the states that are appropriate for your equipment. You don’t need to use all the
states. The equipment phase just skips any states that you don’t add.
For the producing and standby states, use
subroutines. If you want to define producing and standby states for your equipment, use subroutines.
A. Create a routines for the producing state and another routine for the standby state.
B. In the running state, check for the produce verses standby conditions. Set either the
Producing bit or the Standby bit of the equipment phase tag.
C. Use the Producing and Standby bits as conditions to call the corresponding routine.
See Appendix B .
Guideline Details