Honeywell VFD CORE Installation Instructions Manual page 232

CHAPTER 12: DESCRIPTION OF PARAMETER SETTINGS
Fig. 4. Sequence of Fixed quantity circulation with PID – Increasing Demand
Fig. 5. Sequence of switching motors at fixed quantity circulation with PID – increasing demands.
However if decreasing demands when flow quantity and pressure are too big, VFD CORE will stop the current operating motors
and wait for the delay time setting of Pr10-04. Then keep on doing this until the last motor stop using mains electricity. See
sequential diagrams in Fig. 6 & 7 below.
63-4528—04
FREQUENCY
NEXT MOTOR
VFD CORE
OPERATIONS
STOP MOTOR
OUTPUT
(FLOW OR PRESSURE)
TOTAL
OUTPUT
MOTOR 1
MOTOR 1
AC MAINS
BY DRIVE
MOTOR 2 OFF
BY DRIVE
OFF
MOTOR 3
MOTOR 4
INCREASING DEMAND
FREQUENCY
P10-06
MAINS (50Hz)
MOTOR #2 BY DRIVE
MOTOR #2
MOTOR #3
0 Hz
MOTOR 4
MOTOR 3
MOTOR 2
AC MAINS
AC MAINS
BY DRIVE
OFF
BY DRIVE
P10-03
P10-05 P10-03
MOTOR #2 ON MAINS
MOTOR #3
MOTOR #3 OFF
BY DRIVE
232
DEMAND
DEMAND
M33768
TIME
M33769