Honeywell EXCEL 5000 User Manual page 258

EXAMPLES
74-5577–33 (US)
EN2B-0184 GE51 R0518 (Europe)
The following diagram shows the required CARE programming for this example.
Switchover occurs every 100 hours. The switching tables save the time period for
status P1 and status P2. Y1 and Y2 are MAT formulas that work together to operate
the switching tables.
Y1 = run hours P1 - P1_Difference
Y2 = run hours P2 - P2_Difference
The control loop and switching tables use flags for the hours and statuses since
these values are of no interest to a user at an operator's terminal.
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CARE CONTROL ICONS