Rockwell Automation 1794-Lxxxx PhaseManager - Manual (Page 38)

38 Publication LOGIX-UM001B-EN-P - April 2010
Chapter 3 Guidelines
Example 1: Add Water to a Tank
If Add_Water.Running And Water_Feed.Health Then
PFL(202);
End_If;
The prestate routine watches for equipment faults while the equipment phase is in
the running state (Add_Water.Running = 1). If Water_Feed.Health = 1, then a fault
happened. If a fault happens, the equipment phase sets a failure code of 202.
The equipment program watches the fault bits of the valve, pump, and their feedback devices.
If any of that equipment faults, the equipment program turns on the Water_Feed.Health bit.