Omron ZEN - Page 172

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Application Examples Appendix E
Parameter Settings
Greenhouse Air Circulation Control (2/3) (Calendar
Timer and Weekly Timer)
Application
The ZEN can be used to operate circulation fans during winter nights only.
In this example, the circulation fans operate only at night (19:00 to 6:00) during winter
(November 15 to March 20).
During the operation period, the fans operate intermittently, 60 minutes ON, 30 minutes
OFF. The low startup current results in a 30 second difference in the fan startup times.
The start and stop operation days during winter (November 15 and March 20) are set
using the calendar timer (*0).
The start and stop operation times during the night (19:00 and 6:00) are set using the
weekly timer (@0).
The startup time difference and operate/stop cycles are set using the timer (T0 to T2).
T0 X S A
TRG
RES 30.00
T1 X H:M A
TRG
RES 01.00
T2 X H:M A
TRG
RES 01.30
Offset start timer
setting T0
Operation timer setting T1 Operation timer setting T2
Set to 30 seconds. Set to 1 hour. Set to 1 hour 30 seconds.
Z211-E1-03.book Page 148 Friday, November 21, 2008 10:38 AM