iGrow 1800 Installation Guide
Page55
Link4 (714) 524-0004
VPD Settings
V
VPD Settings
Media Sensor
Temp1
1
This is where you select the sensor that is measuring the plant temperature for the VPD measurement
Cyclic Lighting
V
Cyc. Mode
Sequential
hh:mm
Start Delay 00:00
Finish Delay 00:00
There are two modes available for cyclic lighting:
Sequential
and
Concurrent
. Sequential is when one
light bank comes on at a time. Concurrent is when they all come on at the same time.
The
Start Delay
is at the beginning of the cycle and the
Finish delay
occurs at the end. See diagram
below.
V
hh:mm
Min On Time 00:00
The
Min On
Time
is the shortest time that the lights will be on. This is to eliminate “short cycling” of the
lights.
The figure below illustrates the case where you selected the sequential mode and you have two light
banks. The start delay is at the beginning of the cycle. (Each light bank is programmed separately as to
the time window for the light bank to be enabled and the on time for each light bank. The channel
programming is shown in the section
Programming Equipment
and the subsection
Cyclic Lighting
.)
The Start delay occurs at the beginning of the cycle and the Finish delay at the end.
In this
Sequential
mode the overall cycle time is equal to the
Start Delay
+ Sum of all light channel On
Times +
Finish Delay
. During the
Start Delay
and
Finish Delay
times, all the lights are off so this is in
effect the Off Time.
