Honeywell HVAC400x Applications Manual page 137

A
B
Fig. 35. The activation signal comes from a digital input or a virtual digital input, like a time channel. The
A. Remaining time.
B. Activation.
Example:
Problem:
The HVAC drive is in a warehouse and controls air conditioning. It must operate between 7 am and 5 pm on
weekdays and between 9 am and 1 pm on weekends. It is also necessary for the drive to operate outside these
hours, if there are personnel in the building and the digital signal is OFF. The drive must continue to operate 30
minutes after the personnel has left.
Solution:
Set two intervals, one for weekdays and one for weekends. A timer is also necessary to activate the process
outside the set hours. See the configuration below.
Real-Time Clock
Set the date and time in P5.5x.
Digital Inputs P3.5.1.x
Liberate DigINSlotA4 P3.5.1.16 from Preset Freq Sel 0: DigINSlot0.1
Assign DigINSlotA.4 to P3.5.1.19.
Interval 1
P3.12.1.1: ON Time: 07:00:00.
P3.12.1.2: OFF Time: 17:00:00.
P3.12.1.3: From Day: 1 (= Monday).
P3.12.1.4: To Day: 5 (= Thursday).
C
timer counts down from the falling edge
Legend
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HVAC400X – APPLICATION MANUAL
C. Duration.
D. OUT.
t
D
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