Fig. 75: The activation signal comes from a digital input or a virtual digital input, like a time
channel. The timer counts down from the falling edge.
A. Remaining time
B. Activation
C. Duration
D. Time
E. OUT
The parameters below will set the timer active when the digital input 1 on the slot A is
closed. They will also keep the timer active for 30 s after it is opened.
•
Duration: 30 s
•
Timer: DigIn SlotA.1
You can use a duration of 0 seconds to override a time channel that is activated from a digital
input. There is no off delay after the falling edge.
Example:
Problem:
The AC 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. The drive must
continue to operate 30 minutes after the personnel has left.
Solution:
Set 2 intervals, 1 for weekdays and 1 for weekends. A timer is also necessary to activate the
process outside the set hours. See the configuration below.
Interval 1
P3.12.1.1: ON Time: 07:00:00
P3.12.1.2: OFF Time: 17:00:00
P3.12.1.3: Days: Monday, Tuesday, Wednesday, Thursday, Friday
P3.12.1.4: Assign to channel: Time channel 1
VACON · 300 PARAMETER DESCRIPTIONS
10
LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/
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