iGrow 1800 - Link4 Corporation
™
iGrow 1800
INTELLIGENT ENVIRONMENTAL CONTROLLER
Installation and User’s Guide
Nov 2015 v3.0a Edition
Copyright © 2008
Corporation
Table of Contents
Introduction .............................................................................................. 1
Customer Service .......................................................................................................... 1
Contact Us ..................................................................................................................... 1
Warranty ...................................................................................................................... 2
Returns ........................................................................................................................ 2
Repairs......................................................................................................................... 2
Additional Costs ......................................................................................................... 2
Governing Law ............................................................................................................ 2
Support ........................................................................................................................ 2
Before you Begin....................................................................................... 3
Temperature Control .................................................................................................... 3
Deadbands ..................................................................................................................... 3
Setpoint .......................................................................................................................... 3
Ramping ......................................................................................................................... 4
Control Strategy ....................................................................................... 5
Setpoint and Staging Worksheets ............................................................................ 6
CO2 Worksheet........................................................................................................... 6
For more information on CO2 control, see the CO2 Equipment portion of this
manual.Accumulated Light Worksheet for Irrigation ............................................. 7
Accumulated Light Worksheet for Irrigation........................................................... 7
Cycle & Trigger Worksheet for Irrigation ................................................................ 8
Schedule Worksheet for Irrigation ........................................................................... 8
Installation .................................................................................................................. 9
Content Inspection ..................................................................................................... 9
Recommended Tools ................................................................................................. 9
iGrow 1800 Overview ............................................................................................ 12
Opening the iGrow 1800....................................................................................... 13
Internal Layout.......................................................................................................... 14
Wiring the iGrow 1800 .......................................................................................... 14
Power Supply Installation ........................................................................................ 15
Output Installation ................................................................................................... 17
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Control Relays & Contactors...................................................................................... 17
“Wet” and “Dry” Contact Design ................................................................................ 17
Hardware Interlock Jumpers ...................................................................................... 21
Indoor Air Temperature and Humidity Sensor ..................................................... 24
Light Sensor .............................................................................................................. 26
Wind Direction and Wind Speed (Anemometer) ................................................... 29
Rain Sensor (Tipping Bucket) .................................................................................. 31
Precipitation Sensor (Fast Response) ..................................................................... 33
Outdoor Air Temperature sensor ........................................................................... 35
CO2 Sensor ................................................................................................................ 37
Bottom Heat Probes ................................................................................................. 39
Wiring Sensaphone .................................................................................................. 41
Expansion Units & Multi-Zone Network ................................................................ 43
Programming your iGrow1800 ............................................................. 46
Before You Begin Programming ................................................................................ 46
Navigation .................................................................................................................... 46
Status Screens and Programming Screens ............................................................... 47
Status Screens ............................................................................................................. 47
Welcome Screen ....................................................................................................... 47
Main Status Screen ................................................................................................... 48
Sensor Status Display ................................................................................................ 50
Equipment Status ..................................................................................................... 51
Yesterday’s Averages Status ................................................................................... 51
Programming Screens ................................................................................................ 52
Begin Programming .................................................................................................... 52
System Setup (installation settings) ......................................................................... 52
Cool/Heating Stages .................................................. Error! Bookmark not defined.
Setup Deadbands ..................................................................................................... 53
Setup Location .......................................................................................................... 53
Outputs Control ....................................................................................................... 54
Setup Inputs (sensor mapping) .............................................................................. 57
Calibrate Inputs ........................................................................................................ 59
Time/Date & History ................................................................................................ 59
System Units ............................................................................................................. 60
Communications (Network Programming) ............................................................ 60
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Fallback Settings ...................................................................................................... 61
Advanced Settings.................................................................................................... 62
Clear History ................................................................................................................ 65
SmartCool Factors .................................................................................................... 65
Setpoint/Time Period Programming ......................................................................... 66
Programming Equipment ........................................................................................... 69
ON/OFF Equipment .................................................................................................. 71
Irrigation Programming ........................................................................................... 72
CO2 Equipment ........................................................................................................ 78
Light (HID) Equipment ............................................................................................. 79
Pump Control ............................................................................................................ 83
Vent (Proportional) Programming .......................................................................... 85
Curtain Programming .............................................................................................. 87
Mixing Valves............................................................................................................ 89
PZone (Micro-Zone) for Proportional Equipment ................................................. 92
VOut Variable Voltage/Current Output ................................................................. 95
Dehumidify/Humidify................................................................................................. 97
Stage Overrides ........................................................................................................... 98
Equipment Overrides .................................................................................................. 99
Smart Cool Settings .................................................................................................. 100
Setpoint Alarms ......................................................................................................... 102
Auxiliary Controls ..................................................................................................... 102
Expansion Settings ................................................................................................... 103
Heat Demand ............................................................................................................. 104
Cool Demand ............................................................................................................. 105
Appendix – Advanced Auxiliary Controls…………………..………….106
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Introduction
Welcome to iGrow 1800TM, Link4’s Intelligent Greenhouse Environmental Controller. The iGrow 1600/1800TM
represents the latest in greenhouse environmental control automation. iGrow 1800 TM enables you to control
and integrate a variety of equipment in your greenhouse. Your heating, cooling, venting, shading, humidity, CO2
lighting, misting and irrigation needs are linked together into one flexible, easy-to-use system.
Link4 can offer reliable service because we are staffed by the designer and engineers that developed the iGrow
1800TM. In designing the iGrow 1800TM it was our purpose to design a controller specifically for the demands
and cost concerns for small to mid size growers and no other controller has a better feature to price ratio than
iGrow 1800TM. Your greenhouse control system should improve the quality and efficiency of your operation.
iGrow 1800TM offers quick installation, and dynamic programming flexibility for easier and more accurate
greenhouse management giving you the freedom for you to focus on plants and profits.
The reason why we stand out from others is because of our Link4 Promise: Our passion is to provide
growers with intelligent control solutions. We understand controlling your growing environment is critical
to your success. Therefore, our commitment is to build outstanding controllers and to provide excellent
support so that you can know with confidence that the iGrow 1800TM system is right for you.
Customer Service
Link4 has a well-trained customer support staff that is ready to help. Our customer service center is committed
to your greenhouse business 24/7 through our website or service line for access to solutions for your controller
needs. Before you contact us, please write down the model number and serial number located inside the iGrow
1800TM enclosure so that we can serve you better.
Contact Us
Address:
Website:
Link4 Corporation
22725 La Palma Avenue
Yorba Linda, CA 92887
http://www.link4corp.com
Telephone:
Email:
SUPPORT 866.755.5465
Sales: [email protected]
FAX 714.854.7244
Service: [email protected]
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Terms and Conditions
Warranty
Link4 warrants that the goods sold under this contract will be free from defects in material and workmanship for
a period of 12 months after the date of purchase. This warranty will be limited to the repair and replacement of
parts and the necessary labor and services required to repair the goods. IT IS EXPRESSLY AGREED THAT
THIS WARRANTY WILL BE IN LIEU OF ALL WARRANTIES OF FITNESS AND IN LIEU OF THE
WARRANTY OF MERCHANTABILITY.
Moreover, any description of the goods contained in this contract is for the sole purpose of identifying them, is
not part of the basis of the bargain, and does not constitute a warranty that the goods will conform to that
description. The use of any sample or model in connection with this contract is for illustrative purposes only, is
not part of the basis of the bargain, and is not to be construed as a warranty that the goods will conform to the
sample or model. No affirmation of fact or promise made by Link4, whether or not in this contract, will constitute
a warranty that the goods will conform to the affirmation or promise.
Link4 shall not be responsible for replacement(s) or repair(s), which become defective from user negligence,
modification, abuse and/or any types of improper usage. Nonconformance to any of the specifications in the
product manual will void the warranty. Furthermore, our liability to the goods sold, whether on warranty,
contract, or negligence, will be released upon the expiration of the warranty period when all such liability shall
terminate.
Link4 shall not be responsible for any loss or claims due to consequential damages afford by the Buyer. Link4
also reserves the right to make any necessary changes to features and specifications to condition or warranty.
Returns
Merchandise cannot be returned without a Return Merchandise Authorization (RMA) number from Link4.
Requests for permission to return defective items must be made within (14) fourteen days after receipt of
shipment. A Link4 RMA # for approved returns must appear on both the customer's shipping carton and the
related receipt memo. Parts under warranty will be repaired at no charge. Other returned items will be
subjected to the following restocking charges: 20% for no value added items, 40% for value added items, and
75% for custom designed or built to specification items.
Repairs
A repair order must also have a Link4 Return Merchandise Authorization (RMA) number. Repairs that are not
covered by the warranty will be billed on a material and labor basis. Items returned for repair must be sent to
Link4 with prepaid return transportation Link4 will not be responsible for damage(s) due to improper packaging
or shipping and delivery of items returned for repair.
Additional Costs
It is expressly agreed that Buyer will reimburse Link4 for any additional costs attributable to changes in the
specifications, directions, or design of the items furnished which are requested or approved by Buyer at Link4’s
listed retail prices in effect at the time such changes are ordered.
Governing Law
The validity of this contract and of any of its terms or provisions, as well as the rights and duties of the parties
under this contract, shall be construed pursuant to and in accordance with the law of California. The parties
specifically agree to submit to the jurisdiction of the courts of California.
Support
In order to offer you the best support, we request that you register your product with us online at
www.link4corp.com. You will find the Register selection under the Support tab of the website.
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Before you Begin
Temperature Control
With the iGrow 1800TM you can program a cooling temperature target called a “Cool Setpoint” and a heating
temperature target called a “Heat Setpoint”. The temperature range between these two targets is called the
“Normal” temperature range. If the greenhouse temperature is within the Normal temperature band usually
none of the cooling or heating equipment is on. However, some circulation fans (often called horizontal air flow
(HAF) fans) may be active to maintain air movement within the greenhouse environment.
Whenever the temperature within the greenhouse moves above the cool setpoint, or below the heat setpoint
(falls outside the Normal temperature range) the iGrow 1800TM will enter cooling or heating stages to bring it
back in line. With the iGrow 1800TM you can program up to six cooling and six heating stages. These stages go
from Cool 1 to Cool 6 and Heat 1 to Heat 6. Cool 1 and Heat 1 are the least aggressive with Cool 6 and Heat 6
the most aggressive. In your program you will determine what equipment you want to be active in each of the
stages. Of course, you do not need to use all the stages
When the air temperature in the greenhouse rises above the Cool Setpoint, the system enters the first stage of
cooling, referred to as Cool 1. If the temperature continues to rise, the system will enter the second stage, Cool
2, then the third stage, Cool 3 and so forth. At each increasing cooling stage, more cooling will be brought to
attempt to bring the air temperature below the cool setpoint and within the target “Normal” temperature range.
Heating works the same way.
In considering the difference between each heating and cooling stage there is a variable increment in the
program which is the number of degrees between each heating and cooling stage called the “Stage Separation”
or ‘Stage Width”. Whenever the temperature rises 1 degree above the cool setpoint (700) then the iGrow
1800TM will activate the appropriate equipment to bring the greenhouse to the normal temperature range. If the
temperature rises 2 degrees above the cool setpoint then the controller will be active in C2 cooling stage. The
same goes for the heating stage when the temperature drops below the heating setpoints. In Figure 2.1, there
is an example with four cooling stages and two heating stages.
Deadbands
If the temperature is below the cool setpoint and rises into the first stage of cooling, some cooling equipment will
be turned on. This may then lower the temperature and bring it into the normal range. In order to keep the
equipment from oscillating, a “Deadband” is employed when the temperature is between stages. In Figure 2.1
the dead band is set at 1 degree so that when the greenhouse is attempting to return to Normal temperature
from C4 to C3 the controller will use a deadband of 1 degree to keep the equipment from oscillating off and on.
Now, when the temperature drops below the cool setpoint, the system remains in the Cool 1 stage until the
temperature drops below the Cool Deadband. The concepts that we described for cooling operate in the same
manner for heating.
Setpoint
You will be able to use up to 8 setpoints in a 24 hour time period. Within each day Setpoints are based on time
and temperature to produce an ideal environment. By placing setpoints during different times of the day you
can regulate the temperature within a range for target temperatures and humidity. When a setpoint is in affect
at a certain time length the controller will activate the necessary equipment in heating and cool stages to bring
the environment back to Norm. The same applies when the humidity rises or falls beyond the target low/high
setpoint. When one or more setpoints are used the second or subsequent setpoints will become the active
setpoint at the start time and the previous setpoint will end.
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Ramping
In addition, you have the option of a temperature ramp between the setpoints. Each setpoint time period ends
with a Ramp time. The benefit of ramping allows for you to make smooth transitions within the greenhouse so
that the plants don’t experience temperature shock. Ramping also saves energy, which translates directly into
lower operating costs.
Setpt 1
72.5°F
End of
Ramp time
6:30pm
Beginning of
Ramp time
6:00pm
End of
Ramp time
9:00am
Beginning of
Ramp time
8:00am
In the example below, the start time is 8:00a with a 30-minute ramp time. The ramp time enables a smooth
transition of the target temperatures between the setpoint time periods. Of course, the ramp times can be set to
0 and in this case there will be an immediate step transition in the set points. This is best explained by the
illustration shown below.
Setpt 2
70.5°F
1°F Deadbands
75°F
Cool
Cool
Cool
Cool
70°F
Stage
Stage
Stage
Stage
4
3
2
1
Normal
Temp
Range
Heat Stage 1
Heat Stage 2
65°F
12am
1
2
3
4
5
6
7
8
9
10
11 12pm
Setpt 1
68.0°F
1
2
3
4
5
6
7
8
9
10
11
Setpt 2
67.0°F
in this Example:
Setpoint 1 is set to 9:00am with a 30minute Ramp, Temp is set as 68 to 72.5°F
Setpoint 2 is set to 6:30pm with a 60minute Ramp, Temp is set as 67 to 70.5°F
Figure 2.1 Example of Setpoints, Staging, & Deadbands
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Control Strategy
Prior to installing and programming the iGrow 1800 it is important to determine an overall strategy to control
the environment in the greenhouse. The iGrow 1800 is an extremely flexible and powerful device, thus
additional care and planning are required.
In order to aid you with the process, Link4 has provided several worksheets in the following pages. It is
assumed that you already possess a general understanding of greenhouse controls. If not, please review this
section carefully.
It is recommended that you make copies of these sheets before using them. They will be useful in the future
should your control need change.
The first worksheet is for temperature and humidity controls. It should be completed as thoroughly as possible,
depending on your needs.
The second worksheet is for CO2 controls. Skip this worksheet if you don’t plan on regulating the amount of
CO2 in your greenhouse.
The next 3 worksheets are for Irrigation. The iGrow 1800 supports up to 4 different modes of irrigation.
Please see the Programming Section of this manual for additional information for these modes. These modes
are supported on a per channel basis, so any combination of them can be used depending on your irrigation
needs. If there are no plans for irrigation or misting controls with the iGrow 1800 then these worksheets can
be skipped.
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Setpoint and Staging Worksheets
SET POINTS
START TIME
TEMPERATURE
Low Set Pt.
High Set Pt.
(°F/°C)
(°F/°C)
RAMP
TIME
HUMIDITY
Low Set Pt.
High Set Pt.
(%)
(%)
(min)
FOR ON/OFF & VENT ONLY
EQUIPMENT
NAME
OUTPUTS
HEATING STAGES
H6
H5
H4
H3
H2
COOLING STAGES
H1
N
C1
C2
C3
C4
C5
C6
DH1
DH2
HUMIDIFICATION
DEHUMIDIFICATION
1
2
3
4
DHLT
H
1
2
3
4
5
6
7
8
9
10
11
12
1
0
%
--
=
=
=
=
ON
OFF
GO TO %
NOT AFFECTED
Figure 3.1 Setpoint & Staging Worksheets
For more information on Staging, see the Cool/Heat Stages portion of this Manual. For more information on
Setpoints, see the Setpoint/Timeperiod portion of this manual.
Note: Curtains are not tied to staging (i.e. Inside Temp), they are controlled by light, outside temperature
and overrides only.
Mix Valves are also not tied to staging, they independently adjust based on Indoor temperature,
Outdoor temperature, and water temperature.
CO2 Worksheet
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CO2
OUTPUTS
EQUIPMENT
NAME
START TIME
END TIME
MINIMUM CO2
LEVEL
MAXIMUM CO2
LEVEL
(hh:mm)
(hh:mm)
(ppm)
(ppm)
CO2 ENABLED
STAGE
MINIMUM
LIGHT LEVEL
(W/m2)
1
2
3
4
5
6
7
8
9
10
11
12
Figure 3.2 CO2 Worksheet
For more information on CO2 control, see the CO2 Equipment portion of this manual.
Accumulated Light Worksheet for Irrigation
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ACCUMULATED LIGHT MODE
OUTPUTS
EQUIPMENT
NAME
ON TIME
START TIME
END TIME
ACCUMULATED
LIGHT LEVEL
LOW TEMP
(hh:mm:ss)
(hh:mm)
(hh:mm)
(W/m2h)
LOW
TEMP
ACCUMULATED
LIGHT LEVEL
ELEVATED
TEMP
ELEVATED
TEMP
MAX OFF
TIME
(°F/°C)
(W/m2h)
(°F/°C)
(hh:mm)
1
2
3
4
5
6
7
8
9
10
11
12
For more information on Accumulated Light mode irrigation, see the Irrigation portion of this manual.
Figure 3.3 Accumulated Light Worksheet for Irrigation
Cycle & Trigger Worksheet for Irrigation
CYCLE MODE
OUTPUTS
EQUIPMENT
NAME
TRIGGER MODE
ON TIME
START
TIME
END TIME
CYCLE
TIME
START TIME
END TIME
(hh:mm:ss)
(hh:mm)
(hh:mm)
(hh:mm)
(hh:mm)
(hh:mm)
1
2
3
4
5
6
7
8
9
10
11
12
For more information on Cycle & Trigger mode irrigation, see the Irrigation portion of this manual.
Figure 3.4 Cycle & Trigger Mode Worksheet for Irrigation
Schedule Worksheet for Irrigation
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SCHEDULED MODE
OUTPUTS
EQUIPMENT
NAME
ON TIME
START TIME
(hh:mm:ss)
(hh:mm)
T1
T2
T3
T4
SCHEDULED IRRIGATION DAYS
T5
T6
Su
M
T
W
Th
F
Sa Su
M
T
W
Th
F
1
2
3
4
5
6
7
8
9
10
11
12
For more information on Schedule mode irrigation, see the Irrigation portion of this manual.
Figure 3.5 Schedule Mode Worksheet for Irrigation
Installation
Content Inspection
It’s always a good idea to check to make sure your iGrow1800 came with all items listed below.
Additional accessories such as outside temperature sensor, light sensor, wind and rain sensors, and CO2
monitors can be purchased and added at any time.
Make sure you have all items, all associated hardware, and necessary tools before you begin installation.
If there is any visible damage or missing parts, please contact our customer service at
[email protected] or 1-866-755-LINK or fax us at 714.854-7244.
1.
2.
3.
4.
5.
6.
7.
8.
iGrow 1800 unit
12 VDC external Power Supply
Temp/Humidity Sensor with 50ft. cable
4 pcs – 3/8” Drive, Hex Head Self Drilling Screws
8 pcs – 1/4” Washers
4 pcs – 1/4 -20 x 1” Hex Bolts
4 pcs – 1/4 –20 Hex Nut
1pc – small screwdriver (for tightening wire terminals).
Recommended Tools
1.
2.
3.
4.
5.
6.
Drill
3/8” socket drive drill bit with 3” extender
Adjustable Wrench
1/8” high speed steel drill bit
7/16” socket drive with 3” extender
Level (optional)
iGrow 1800 Installation Guide
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Sa
7.
Pencil
Mounting the iGrow 1800
1. First, find a secure location to mount the iGrow 1800 controller. The area should be away from direct
sunlight, condensing humidity, rain, and extreme temperatures. It should be mounted in an easily
accessible location at the user’s eye level.
2. Since the iGrow 1800 is equipped with a hinged door and a hinged access panel for easy service
and installation, make sure there is adequate workspace. The recommended area is as diagrammed
in Figure 4.1.
Figure 4.1 Mounting Clearance for iGrow1600/1800
3. The iGrow 1800 comes with a 12V DC wall mount power supply. Make sure there is a power outlet
within approximately 6 feet. It is recommended that the outlet is not switched and is on a circuit that is
independent of any noisy, high power equipment. The use of a sealed outlet is recommended if the
power output is exposed to moisture.
4. There are 4 mounting feet on the backside of the iGrow 1800. For shipping reasons, they have been
rotated inward so they don’t protrude from the sides of the iGrow 1800. Using the Drill with #2 Phillips
drive, loosen the four feet and re-align them outward. Gently, but firmly, retighten the screws holding
the feet in place. The brass inserts can strip out so be careful to not over-tighten.
5.
Next, you will want to identify what type of surface you will be mounting the iGrow 1800 to. Included
are 4 self-drilling screws and washers for mounting to beam or wood panel. Also included are 4
pieces ¼ - 20 x 1in. Hex Bolts and 4 pieces of ¼ - 20 Hex Nuts for mounting to a slotted beam. If you
are using the Hex Bolts, make sure that you pre-drill a small pilot hole.
6. Using the appropriate tools depending on your surface, mount the iGrow 1800. Refer to figure 4.2 for
a visual picture.
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iGrow 1800 Installation Guide
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Part Number 371-0000-00
Part Number 371-0000-00
Part Number 370-0008-00
BOLT - 7/16 X 1" HEX DRIVE (4PL)
Part Number 371-0000-00
MOUNTING TO WOOD PANEL
Part Number 372-0000-00
NUT - 7/16" HEX DRIVE (4PL)
Part Number 370-0007-00
Part Number 370-0007-00
WASHER - 1/4" FLAT (8PL)
SCREW - 3/8" HEX DRIVE
SELF DRILLING
(4PL)
SCREW - 3/8" HEX DRIVE
SELF DRILLING
(4PL)
MOUNTING TO SLOTTED BEAM
WASHER - 1/4" FLAT (4PL)
WASHER - 1/4" FLAT (4PL)
MOUNTING TO BEAM
Figure 4.2 iGrow1600/1800 Installation Instructions
iGrow 1800 Overview
Now that the iGrow1800 has been mounted, take some time to look over the front panel. The
iGrow1800 has many features to help give you the growing advantage. Figure 4.3 below gives an
overview of the main components that the iGrow1800 has to offer.
Figure 4.3 Front View of iGrow 1600/1800
Note: There are convenient white spaces provided next to each of the switches to allow for easy
equipment labeling.
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Opening the iGrow 1800
1. First, open the clear hinged door by unlatching the two pull latches.
2. Now, loosen the two thumb screws until the iGrow 1800 ‘s front panel comes out.
3. The front panel has a unique design that allows it to swing downward. It can be stopped at two
positions: fully downward 180 deg or at 90 deg. using the front panel support cable. This cable should
always be tucked away when it is not being used. The hinged design allows for easy accessibility to
the inside of the iGrow 1800 for service and installation procedures and a kink free cable
management when the panel is closed (see Figure 4.4 and Figure 4.5).
Figure 4.4 Full Open View of iGrow 1800
Figure 4.5 Front Panel, in the 90 deg. position
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Internal Layout
Figure 4.6 shows how the iGrow 1800 looks on the inside. Take notice of the board and familiarize
yourself with the internal layout before beginning the wiring process.
Figure 4.6 Internal Layout of the iGrow 1800 PCB
Wiring the iGrow 1800
Warning: Do Not Plug-in the Power in while wiring the iGrow 1800 and keep all toggle switches in the
OFF position.
It is recommended that all connections be made through the 4 liquid tight connectors at the bottom of the
iGrow 1800 since the glands compress around the cables to form a watertight seal. Making any
additional holes in the top, sides, or back of the enclosure can result in water condensation inside the
unit, causing damage to the controller. Failure to install to Link4’s specification will void the warranty.
In preparation for the control wiring you should decide the iGrow 1800 output assignments and control
strategy. For more information on output assignment and control strategies, please refer to the Control
Strategy section and the appropriate worksheets for this manual.
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Power Supply Installation
1. If you want to navigate through the iGrow 1800 to see some of the features and to familiarize
yourself with how it works, begin by installing the power supply. Make sure the power supply is NOT
plugged while installing any other outputs or inputs.
2. Begin the power installation by measuring the distance between where the iGrow 1800 is mounted
and the power socket. There needs to be about 6 feet between the two. If the power supply is too
short, then use a power extension cord.
3. Make sure all 12 manual toggle switches are in the OFF position (center).
4. Lower the front panel to the 90 deg position by using the tucked away front panel support cable. See
figure 4.5.
5. Take the open end (the two stripped and tinned leads) of the power supply. The RED lead is the 12V
power and the BLACK lead is the GND (ground). Route the power lead through the left most liquid
tight connector. Remember not to plug in the power supply at this time
6. Locate the DC Input Power terminal along the left edge of the PCB. See Figure 4.6 and Figure 4.7.
7. Connect the Ground lead (BLACK) to the GND terminal using a #0 screwdriver. Make sure that when
screwing to make it a snug fit. Be careful not to over tighten the connection.
8. Do the same and connect the 12V power lead (RED) to the 12 V terminal using a #0 flat drive
screwdriver.
9. Now, if you want you can plug in the power to navigate through the iGrow 1800 or you can continue
to install different outputs or inputs, but if you continue, remember to keep the power supply
unplugged.
10. Power supply must be plugged into a water resistant outlet that is sourced from a clean 120V/6oHz circuit.
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Part Number 551-0000-00
Figure 4.7 Wiring the Power Supply
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Output Installation
The general installation strategy for this section is to install the output equipment in the greenhouse first
and then the inputs to keep the cables organized in the iGrow 1800. It is assumed that at this point you
have already planned the channel assignment. If not, please refer back to the previous section on
Control Strategy.
All cables coming into and out of the iGrow 1800 should go through the 4 liquid tight connectors at the
bottom of the enclosure. In order to minimize interference, it is also recommended that the sensor input
wires not be routed through the same connector as the power wires. For best results, route all sensor
wires through the right most liquid tight connector and then move toward the left. The power wires and
non-sensor wires are routed through the left most connector, and if needed, the next connector over.
Control Relays & Contactors
Your iGrow 1800 has twelve output relays that come set up with “wetted” contacts. The black terminal
jumpers come set, from the factory, so that you can bring in a Master common 24 VAC.
When wiring this way, as wetted, the line current on the master common should not exceed 7 amps. If
you remove a black jumper, its associated relay is then wired as a “dry” contact. See Figure 4.8 and
Figure 4.9.
The board mounted relays are intended as “pilot” relays. For most loads you will want the iGrow 1800
outputs to control a load relay or contactor that is connected to the motor. However, in some cases such
as irrigation valves that are 24 VAC, you can drive them directly assuming that you are wiring only one or
two valves per relay. The maximum run current recommended for each of the iGrow1800 relays is 1 amp.
There are voltage suppressors on each output to protect the iGrow 1800 from excessive inductive spikes.
Additional protection should be used in the contactor panel if there are large inductive loads.
Wet” and “Dry” Contact Design
“
A wet output switches the output to a shared 24VAC source. There is one terminal for each output (+) and a
shared terminal for the 24VAC (master common)
A Dry output closes a switch. There are two terminals for each output (+) and (-).
“Wet” contact installation design is used when connecting one power wire to the master common 24 VAC
source for multiple equipment such as irrigation and then a single wire to the appropriate channel. “Wet”
design installation is utilized to minimize the amount of wires and fewer transformers.
By default the
black terminal jumpers are set in place. It is not necessary to remove the black terminal jumpers when
using a “wet” contact installation.
Note: Both of the MASTER COMMON terminals and the channel terminals are the same and provide a
maximum capacity of 7 amps. See Figure 4.8 for an example of a “wet” contact installation.
“Dry” contact installation design is used when a user wants to isolate equipment and use transformers for
every piece of equipment. In this case, put both the wires in the appropriate channel and then remove
the black terminal jumper for each channel wired as a dry contact. (you may replace the black terminal
back on only ONE pin for safe keeping). See Figure 4.9 for an example of a “dry” contact installation.
It is also possible to utilize both “wet” and “dry’ contact installations at the same time. Refer to the “wet”
contact section to install a “wet” setup and refer to the “dry’ contact section to install a “dry’ contact.
Remember when installing a “dry” contact to remove the black terminal jumper for each channel wired as
a “dry” contact only. See Figure 4.10 to view an example of output wiring a combination of “wet” and “dry”
contacts.
iGrow 1800 Installation Guide
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Figure 4.8 Output Wiring Example, Wet Contact
iGrow 1800 Installation Guide
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110 / 220 VAC
24VAC
TRANSFORMER
RELAY COIL
FOR MOTOR
OR SOLENOID
RELAY COIL
FOR MOTOR
OR SOLENOID
RELAY COIL
FOR MOTOR
OR SOLENOID
CHANNEL 3
CHANNEL 2
CHANNEL 1
THE TWO
CENTER WATER TIGHT GLANDS.
5. DO NOT WIRE 120/220VAC INTO iGROW 1400 OUTPUT TREMINALS.
6. IT IS RECOMMENDED THAT YOU RUN ALL OUTPUT WIRING THROUGH
1. STRANDED 18AWG MAXIMUM WIRE GAUGE RECOMMENDED.
2. 30VAC MAX VOLTAGE.
3. MAXIMUM OF 1AMP CURRENT RATING PER CHANNEL.
4. MAXIMUM OF 7AMP CURRENT RATING ON MASTER COMMON.
NOTES:
BLACK TERMINAL JUMPER
FOR EACH CHANNEL WIRED AS A
WET CONTACT.
USE
Figure 4.9 Output Wiring Example, Dry Contact
iGrow 1800 Installation Guide
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24VAC
TRANSFORMER
24VAC
TRANSFORMER
RELAY COIL
FOR MOTOR
OR SOLENOID
RELAY COIL
FOR MOTOR
OR SOLENOID
CHANNEL 4
CHANNEL 3
CHANNEL 1
CHANNEL 2
24VAC
TRANSFORMER
THE TWO
CENTER WATER TIGHT GLANDS.
5. DO NOT WIRE 120/220VAC INTO iGROW 1400 OUTPUT TERMINALS.
6. IT IS RECOMMENDED THAT ALL OUTPUT WIRING IS RUN THROUGH
1. STRANDED 18AWG MAXIMUM WIRE GAUGE RECOMMENDED.
2. 30VAC MAX VOLTAGE PER CHANNEL.
3. MAXIMUM OF 1AMP CURRENT RATING PER CHANNEL.
4. MASTER COMMON NOT USED ON ANY CHANNEL WIRED
AS A DRY CONTACT.
NOTES:
BLACK TERMINAL JUMPER
FOR EACH CHANNEL WIRED AS A
DRY CONTACT.
REMOVE
RELAY COIL
FOR MOTOR
OR SOLENOID
RELAY COIL
FOR MOTOR
OR SOLENOID
24VAC
TRANSFORMER
110 / 220 VAC
110 / 220 VAC
110 / 220 VAC
110 / 220 VAC
Figure 4.10 Output Wiring Example, Combination Wet and Dry Contact
iGrow 1800 Installation Guide
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Link4 (714) 524-0004
24VAC
TRANSFORMER
RELAY COIL
FOR MOTOR
OR SOLENOID
RELAY COIL
FOR MOTOR
OR SOLENOID
RELAY COIL
FOR MOTOR
OR SOLENOID
CHANNEL 5
CHANNEL 4
CHANNEL 3
WET WIRING
RELAY COIL
FOR MOTOR
OR SOLENOID
RELAY COIL
FOR MOTOR
OR SOLENOID
24VAC
TRANSFORMER
24VAC
TRANSFORMER
THE TWO
CENTER WATER TIGHT GLANDS.
5. DO NOT WIRE 120/220VAC INTO iGROW 1400 OUTPUT TERMINALS.
6. IT IS RECOMMENDED THAT ALL OUTPUT WIRING IS RUN THROUGH
1. STRANDED 18AWG MAXIMUM WIRE GAUGE RECOMMENDED.
2. 30VAC MAX VOLTAGE PER CHANNEL.
3. MAXIMUM OF 1AMP CURRENT RATING PER CHANNEL.
4. MAXIMUM COMBINED CURRENT OF 7AMPS ON MASTER
COMMON TERMINAL.
NOTES:
FOR FURTHER EXPLAINATION OF DRY AND WET
CONTACT WIRING PLEASE SEE CHAPETER 4.
DRY CONTACT ONLY.
FOR EACH CHANNEL WIRED AS A
REMOVE BLACK TERMINAL JUMPER
CHANNEL 1
CHANNEL 2
DRY WIRING
110 / 220 VAC
110 / 220 VAC
110 / 220 VAC
Hardware Interlock Jumpers
Hardware Interlock is a protective mechanical mechanism that prevents two adjacent outputs (1&2, 3&4,
etc.) from coming on at the same time. It is useful for such equipments such as reversible motors and
two speed motors, where it is vital that only one output be turned on at a time
The iGrow 1800 is shipped with all the hardware interlocks disabled. Removing both jumpers for each
curtain, vent or two speed fans enables interlock jumpers. It is important to remove the paired set of red
jumpers with these types of equipment to prevent the possibility of a short in the event the open and close
switches are turned on at the same time. Usually, the contractors in the relay panel have mechanical
interlocks to prevent this from happening and the iGrow interlocks act as a backup. Simply remove the
paired set of red terminal jumpers that are associated with each channel wired as an interlock contact.
See Figure 4.11and Figure 4.12 to view an example of “wet” and “dry” interlocked diagrams.
Note: When a paired set of red interlock terminal jumpers is removed, the corresponding front panel
switches will affect the manual override switches. Manual toggle switches can be used to override,
unless the motor or device is already active or in motion. If you want to manually override a vent,
curtain or two speed fan, put both switches in the Off position prior to switching On one of the
switches.
iGrow 1800 Installation Guide
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Figure 4.11 Output Wiring Example, Wet Interlocked Pair
iGrow 1800 Installation Guide
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110 / 220 VAC
24VAC
TRANSFORMER
CLOSE
RELAY COIL
FOR MOTOR
OPEN
RELAY COIL
FOR MOTOR
CURTAIN, VENT, OR OTHER
CONTROLLER UNIT
CLOSE
COMMON
OPEN
NOT WIRE 120/220VAC INTO iGROW 1400 OUTPUT TERMINALS.
CAN ONLY BE PAIRED AS FOLLOWS:
THE TWO
CENTER WATER TIGHT GLANDS.
7. IT IS RECOMMENDED THAT ALL OUTPUT WIRING IS RUN THROUGH
ODD NUMBER OF ANY PAIR MUST BE WIRED AS OPEN
EVEN NUMBER OF ANY PAIR MUST BE WIRED AS CLOSE
1-2, 3-4, 5-6, 7-8, 9-10, or 11-12
6. INTERLOCKS
5. DO
1. STRANDED 18AWG MAXIMUM WIRE GAUGE RECOMMENDED.
2. 30VAC MAX VOLTAGE.
3. MAXIMUM OF 1AMP CURRENT RATING PER CHANNEL.
4. MAXIMUM OF 7AMP CURRENT RATING ON MASTER COMMON.
NOTES:
INTERLOCK CONTACT. BOTH JUMPERS OF
THE INTERLOCKED PAIR MUST BE REMOVED
FOR INTERLOCK TO WORK CORRECTLY.
RED TERMINAL JUMPER
FOR EACH CHANNEL WIRED AS A
REMOVE
BLACK TERMINAL JUMPER
FOR EACH CHANNEL WIRED AS A
WET CONTACT.
USE
Figure 4.12 Output Wiring Example, Dry Interlocked Pair
iGrow 1800 Installation Guide
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Link4 (714) 524-0004
110 / 220 VAC
24VAC
TRANSFORMER
CLOSE
RELAY COIL
FOR MOTOR
OPEN
RELAY COIL
FOR MOTOR
CURTAIN, VENT, OR OTHER
CONTROLLER UNIT
CLOSE
COMMON
OPEN
NOT WIRE 120/220VAC INTO iGROW 1400 OUTPUT TERMINALS.
CAN ONLY BE PAIRED AS FOLLOWS:
THE TWO
CENTER WATER TIGHT GLANDS.
7. IT IS RECOMMENDED THAT ALL OUTPUT WIRING IS RUN THROUGH
ODD NUMBER OF ANY PAIR MUST BE WIRED AS OPEN
EVEN NUMBER OF ANY PAIR MUST BE WIRED AS CLOSE
1-2, 3-4, 5-6, 7-8, 9-10, or 11-12
6. INTERLOCKS
5. DO
1. STRANDED 18AWG MAXIMUM WIRE GAUGE RECOMMENDED.
2. 30VAC MAX VOLTAGE.
3. MAXIMUM OF 1AMP CURRENT RATING PER CHANNEL.
4. MAXIMUM OF 7AMP CURRENT RATING ON MASTER COMMON.
NOTES:
INTERLOCK CONTACT. BOTH JUMPERS OF
THE INTERLOCKED PAIR MUST BE REMOVED
FOR INTERLOCK TO WORK CORRECTLY.
RED TERMINAL JUMPER
FOR EACH CHANNEL WIRED AS A
REMOVE
DRY CONTACT. BOTH JUMPERS OF THE
INTERLOCKED PAIR MUST BE REMOVED FOR
INTERLOCK TO WORK CORRECTLY.
BLACK TERMINAL JUMPER
FOR EACH CHANNEL WIRED AS A
REMOVE
Input and Sensor Installation
The iGrow 1800 utilizes a variety of different sensors. In this section you will be shown how to install
indoor/outdoor temperature and humidity, light, wind direction and speed, rain and CO2 sensors and a
Sensaphone.
Indoor Air Temperature and Humidity Sensor
The iGrow 1800 ships with a temperature/humidity sensor in a radiation shield to ensure accurate air
temperature readings in direct sunlight. The sensor includes a 50-foot sensor cable. Normally you will
want to hang the sensor near the crop level close to the center of the controlled environment. It is
important to keep the sensor away from irrigation emitters, unit heaters, etc. that will effect the accuracy
of the sensor.
1. First, open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable
supports the front panel securely.
2. Find a central location in the greenhouse and let it hang relatively close to the height of where the
plants will be.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable as needed, but make sure to use an adapter and wire approved by
Link4 to make any extensions (the wire and adapter can be purchased from Link4). Any extension
wire must be shielded and stranded 24AWG type wire.
5. Carefully insert the cable through the right most watertight fitting at the bottom of the enclosure. It is
easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires tighter, use
UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Connect the wires as shown in Figure 4.13.
7. Keep sensor cables away from interference sources, including high voltage power wiring, inverters,
motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such wiring may
cause erratic sensor readings.
8. After installing the sensor, it is recommended that sensors be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor works
properly and accurately. Test the temperature by changing the indoor temperature to see if it is
reading properly. After testing remember to unplug the unit to continue installing other sensors.
iGrow 1800 Installation Guide
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Figure 4.13 Wiring Indoor Temp/Humidity Sensor
iGrow 1800 Installation Guide
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ADJUST InT to SerialSens1. ALSO SET RelHum TO SerialSens1.
3. THIS DRAWING IS NOT TO SCALE.
4. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND
OUTPUT WIRING.
2. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
TERMINALS ARE SHARED BY BOTH SENSORS.
NOTES:
1. WHEN BOTH INDOOR AND OUTDOOR SENSORS ARE WIRED, GND, VOUT, AND CLK
Part Number 990-0001-00
Light Sensor
Link4 offers two types of light sensors; Solar and Quantum. The Solar Light Sensor is sensitive to the
visible light spectrum, whereas the Quantum version limits the light measurement to the 400 to 700
nanometer band where photosynthesis takes place (PAR). Whichever type you’ve chosen, the
installation only varies slightly.
1. Open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable
supports the front panel securely.
2. Find a location that is open and free from obstructions for the sensor to be expose to light from all
necessary angles.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable as needed, but make sure to use an adapter and wire approved by
Link4 to make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the right most watertight fittings at the bottom of the enclosure. It is
easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires tighter, use
UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Keep sensor cables away from interference sources, including high voltage power wiring, inverters,
motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such wiring may
cause erratic sensor readings.
a. Connect the wires as shown in Figure 4.14a for Solar, and Figure 4.14b for Quantum light
Sensor.
7. After installing the sensor, it is recommended that sensors be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor works
properly and accurately. Test the light sensor by giving it light or covering to see different readings.
After testing remember to unplug the unit to continue installing other sensors.
iGrow 1800 Installation Guide
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Figure 4.14a Wiring Solar Light Sensor
iGrow 1800 Installation Guide
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ADJUST Light to Solar .
2. THIS DRAWING IS NOT TO SCALE.
3. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO
OUTPUT WIRING.
Setup Inputs, AND
NOTES:
1. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
Part Number 990-0002-00
Figure 4.14b Wiring Quantum Light Sensor
iGrow 1800 Installation Guide
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Link4 (714) 524-0004
ADJUST Light to Quantum.
3. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND
OUTPUT WIRING.
2. THIS DRAWING IS NOT TO SCALE.
NOTES:
1. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
Part Number 990-0009-00
Wind Direction and Wind Speed (Anemometer)
1. Open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable
supports the front panel securely.
2. Find a location that is open and free from obstructions. Mount the mast at the end of the greenhouse
or other building structure, with the top of the mast extending at least 3 feet above the top of the
building.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable to a maximum length of 150, but make sure to use an adapter and
wire approved by Link4 to make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the right most watertight fittings at the bottom of the enclosure. It is
easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires tighter, use
UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Keep sensor cables away from interference sources, including high voltage power wiring, inverters,
motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such wiring may
cause erratic sensor readings.
7. Connect the wires as shown in Figure 4.15.
8. After installing the sensor, it is recommended that sensors be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor works
properly and accurately. After testing remember to unplug the unit to continue installing other
sensors.
9. If necessary, refer to the Anemometer installation instructions that are shipped with the unit for more
installation details.
iGrow 1800 Installation Guide
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iGrow 1800 Installation Guide
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3. INSTALLING WIND VANE: TWO PEOPLE, AND SEVERAL STEPS ARE NEEDED TO
INSTALL THE WIND VANE.
a. REFERENCING THE DAVIS INSTALLATION MANUAL (pages 3-7), INSTALL ANEMOMETER BASE
& ARM (BUT NOT THE WIND VANE YET).
b. CONNECT WIND DIRECTION WIRES TO THE iGROW1400, AND TURN ON iGROW1400.
c. ON THE iGROW1400 STATUS SCREEN, FIND THE READING FOR WIND DIRECTION.
d. HAVE SECOND PERSON CLIMB LADDER, AND SLOWLY ROTATE THE WIND VANE MOUNTING
SHAFT UNTIL THE iGROW1400 READS DUE NORTH. HINT: ROTATE THE MOUNTING SHAFT IN
SMALL INCREMENTS THEN WAIT ABOUT 8 SECONDS BEFORE READING THE WIND DIRECTION ON
THE iGROW1400.
e. USING A COMPASS, HAVE THE PERSON ON LADDER HOLD THE WIND VANE SO THAT IT IS
POINTING NORTH, THEN VERY CAREFULLY SLIDE IT ONTO THE MOUNTING SHAFT.
f. GENTLY TIGHTEN THE WIND VANE SET SCREW.
g. WIND VANE INSTALLATION IS NOW COMPLETE, BUT DOUBLE CHECK THE INSTALLATION BY
ROTATING VANE TO POINT SOUTH, THEN AFTER 8 SECONDS VERIFY THAT THE iGROW1400 IS
READING SOUTH.
4. THIS DRAWING IS NOT TO SCALE.
2. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND SET
WinSpd TO FDIn1, AND WinDir TO Analog7.
OUTPUT WIRING.
NOTES:
1. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
Part Number 990-7911-00
Figure 4.15 Wiring Wind Direction and Wind Speed
Rain Sensor (Tipping Bucket)
1. Open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable supports
the front panel securely.
2. Find a location that is open and free from obstructions.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable as needed, but make sure to use an adapter and wire
approved by Link4 to make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the right most watertight fittings at the bottom of the enclosure.
It is easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires
tighter, use UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Keep sensor cables away from interference sources, including high voltage power wiring,
inverters, motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such
wiring may cause erratic sensor readings.
7. Connect the wires as shown in Figure 4.16.
8. After installing the sensor, it is recommended that sensors be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor
works properly and accurately. Make sure you test the rain sensor by pouring some water in it as
though it were raining to see if it senses rain. After testing remember to unplug the unit to
continue installing other sensors.
Note: For shipping purposes, the rain sensor has a plastic zip tie that must be cut before it will work
properly.
9. Refer to the Rain sensor installation instructions that are shipped with the unit for more
installation details.
iGrow 1800 Installation Guide
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Figure 4.16 Wiring Rain Sensor
iGrow 1800 Installation Guide
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Rain TO FDIn2.
3. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND SET
OUTPUT WIRING.
2. THIS DRAWING IS NOT TO SCALE.
NOTES:
1. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
Part Number 990-7852-00
Precipitation Sensor (Fast Response)
1. Open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable supports
the front panel securely.
2. Find a location that is open and free from obstructions.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable as needed, but make sure to use an adapter and wire
approved by Link4 to make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the right most watertight fittings at the bottom of the enclosure.
It is easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires
tighter, use UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Keep sensor cables away from interference sources, including high voltage power wiring,
inverters, motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such
wiring may cause erratic sensor readings.
7. Connect the wires as shown in Figure 4.16a.
8. After installing the sensor, it is recommended that sensors be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor
works properly and accurately. Make sure you test the precipitation sensor by sprinkling some
water on it as though it were raining to see if it senses rain. After testing remember to unplug the
unit to continue installing other sensors.
iGrow 1800 Installation Guide
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Figure 4.16a Wiring Precipitation Sensor
iGrow 1800 Installation Guide
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Rain TO FDIn2.
2. THIS DRAWING IS NOT TO SCALE.
3. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND SET
OUTPUT WIRING.
NOTES:
1. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
TO 24VAC
WIRING INSIDE RAIN SENSOR
Outdoor Air Temperature sensor
Instead of a weather station, you may simply be mounting an outdoor air temperature sensor.
1. Open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable supports the
front panel securely.
2. Find a location that is open and free from obstructions such as anything that might cast a shadow.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable as needed, but make sure to use an adapter and wire approved by
Link4 to make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the right most watertight fittings at the bottom of the enclosure. It is
easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires tighter, use
UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Keep sensor cables away from interference sources, including high voltage power wiring, inverters,
motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such wiring may
cause erratic sensor readings.
7. Connect the wires as shown in Figure 4.17.
8. After installing the sensor, it is recommended that sensors be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor works
properly and accurately. Make sure you test the sensor by changing the temperature around it with a
fan, heating or anything that will change the temperature reading. After testing remember to unplug
the unit to continue installing other sensors.
iGrow 1800 Installation Guide
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iGrow 1800 Installation Guide
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ADJUST OutT to SerialSens2.
5. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND
ACCURACY CAN BE SLIGHTLY IMPROVED IF IT'S IN A SHADED AREA.
4. WHEN CHOOSING LOCATION FOR INSTALLING OUTDOOR TEMP/HUM SENSOR, TEMP
OUTPUT WIRING.
3. THIS DRAWING IS NOT TO SCALE.
2. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
TERMINALS ARE SHARED BY BOTH SENSORS.
NOTES:
1. WHEN BOTH INDOOR AND OUTDOOR SENSORS ARE WIRED, GND, VOUT, AND CLK
Part Number 990-0001-00
Figure 4.17 Wiring Outdoor Temp/Humidity Sensor
CO2 Sensor
1. Open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable supports
the front panel securely.
2. Find a location that is inside the greenhouse and also free from obstructions.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable as needed, but make sure to use an adapter and wire
approved by Link4 to make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the right most watertight fittings at the bottom of the enclosure.
It is easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires
tighter, use UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Keep sensor cables away from interference sources, including high voltage power wiring,
inverters, motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such
wiring may cause erratic sensor readings.
7. Connect the wires as shown in Figure 4.18.
8. After installing the sensor, it is recommended that sensor be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor
works properly and accurately. You can perform this test by having one person breath on the
CO2 sensor element (long cylinder protruding from the CO2 enclosure) while the other person
views the CO2 reading on the iGrow1600/1800. After testing remember to unplug the unit to
continue installing other sensors.
9. Refer to the CO2 installation instructions that are shipped with the unit for more installation
details.
iGrow 1800 Installation Guide
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Figure 4.18 Wiring CO2 Sensor
iGrow 1800 Installation Guide
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TERMINALS (+AIN6 and -AIN6) OR THE iGROW1400 TM WILL
TO iGROW1400TM
TO 110 / 220 VAC
7. THIS DRAWING IS NOT TO SCALE.
YOU ARE WELL GROUNDED DURING INSTALLATION.
24VAC
TRANSFORMER
3. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND ADJUST CO2 to AnalogIn6.
4. WIRING FOR CO 2 SENSOR IS NOT INCLUDED, BUT CAN BE PURCHASED FROM LINK4 CORP. IF NEEDED.
5. AFTER INSTALLATION, CO 2 SENSOR MAY NEED UP TO 30 MINUTES TO STABILIZE IT'S READING.
6. CAUTION: DURING INSTALLATION, CO2 SENSOR IS SUSCEPTIBLE TO DAMAGE BY STATIC ELECTRICITY. BE SURE
THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR OUTPUT WIRING.
2. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON THE FAR RIGHT SIDE OF
NOT BE ABLE TO READ DATA FROM IT.
NOTES:
1. CO2 SENSOR MUST BE CONNECTED TO ANALOG INPUT 6
24VAC
TRANSFORMER
CO2 SENSOR
110 / 220 VAC
POWER SUPPLY
TRANSFORMER FOR CO 2
SENSOR NOT SUPPLIED BY
LINK4
OUT
mA
24V
Part Number 990-0004-00
(BLACK WIRE - )
mA
V (RED WIRE + )
0
(~) -
(~) +
Bottom Heat Probes
Your iGrow1800 can support up to 5 temperature probes. The probes can be connected to any Analog
Inputs between 1 to 5 (labeled as AIN1, AIN2, AIN3, on the circuit board)
1. Open up the front panel to the 90 deg. Position, as shown in Figure 4.5. Make sure the cable supports the
front panel securely.
2. Mount or hang your probes in the desired locations.
3. Run the free end of the sensor cable to the controller unit.
4. You may extend the sensor cable as needed, but make sure to use an adapter and wire approved by
Link4 to make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the right most watertight fittings at the bottom of the enclosure. It is
easy to strip insulation and/or break wires when pulling cable. If you want to bundle wires tighter, use
UV protected “tie wraps” (typically blue or black), and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or
fertilizer infiltration WILL cause unstable sensor readings.
6. Keep sensor cables away from interference sources, including high voltage power wiring, inverters,
motor controllers, mercury arc, or sodium lamp circuits. Placing sensor cable near such wiring may
cause erratic sensor readings.
7. Connect the wires as shown in Figure 4.19.
8. After installing the sensor, it is recommended that sensors be checked by plugging in the power
supply and testing under various conditions before moving on in order to make sure the sensor works
properly and accurately. Make sure you test the sensor by changing the temperature around it with a
fan, heating or anything that will change the temperature reading. After testing remember to unplug
the unit to continue installing other sensors.
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Figure 4.19 Wiring Bottom Heat Probe
iGrow 1800 Installation Guide
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ADJUST Temp1 to AnalogIn1, Temp2 to Analog2, Temp3 to Analog3 etc. THIS SENSOR CAN BE
CONNECTED TO ANALOG INPUTS 1 THRU 5. SIMPLY ADJUST THE SOFTWARE SETTINGS TO
MATCH WHICHEVER ANALOG INPUT TERMINAL YOU'VE CONNECTED THE SENSOR TO.
2. THIS DRAWING IS NOT TO SCALE.
3. SOFTWARE SETTINGS: USING THE iGROW1400s KEYPAD, GO TO Setup Inputs, AND
OUTPUT WIRING.
NOTES:
1. IT IS RECOMMENDED TO RUN ALL SENSOR WIRES THROUGH THE WATER TIGHT GLAND ON
THE FAR RIGHT SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOR
Temp Probe 5
Temp Probe 4
Temp Probe 3
Temp Probe 2
Temp Probe 1
Wiring Sensaphone
A Sensaphone is used to notify the user via telephone, cell phone, or pager whenever the sensors reach the
user programmed temperature alarm limits.
1. Open up the front panel to the 90 deg. position, as shown in Figure 4.5. Make sure the cable supports the
front panel securely.
2. Find a location that is near the controller.
3. Run the free end of the cable to the controller unit.
4. You may extend the cable as needed, but make sure to use an adapter and wire approved by Link4 to
make any extensions (the wire and adapter can be purchased from Link4).
5. Carefully insert the cable through the left most watertight fittings at the bottom of the enclosure. It is easy to
strip insulation and/or break wires when pulling cable. Use UV protected “tie wraps” (typically blue or black),
and do not over-tighten.
Note: If any splices are needed to extend cable length, make certain they are WATERTIGHT. Water or fertilizer
infiltration WILL cause unstable sensor readings.
6. Keep cables away from interference sources, including high voltage power wiring, inverters, motor
controllers, mercury arc, or sodium lamp circuits.
7. Connect the wires as shown in Figure 4.20.
8. Make sure you test the Sensaphone by programming a high and low limit and then make the alarms go off
to see if the Sensaphone will contact the right number. After testing remember to unplug the iGrow
1600/1800 before continuing to install other sensors.
9. Refer to the Sensaphone installation instructions for programming the unit.
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Figure 4.20 Wiring Sensaphone
iGrow 1800 Installation Guide
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2. THIS DRAWING NO TO SCALE.
SIDE OF THE iGROW 1400. THIS CONSERVES THE TWO MIDDLE GLANDS FOT OUTPUT WIRING.
NOTES:
1. IT IS RECOMMENDED TO RUN THESE CABLES THROUGH THE WATER TIGHT GLAND ON THE FAR LEFT
TERMINALS WHEN WIRING
SENSAPHONE
REMOVE LO AND HI JUMPER
Part Number 990-1104-00
Expansion Units & Multi-Zone Network
Zone1
Zone2
Zone3
Zone4
Site Master
Zone Master
Zone Master
Zone Master
Expansion Unit 1
Expansion Unit 1
Expansion Unit 1
Expansion Unit 2
Expansion Unit 2
Whether you need to setup multiple zones, add expansion units, or both, creating a network of iGrow 1800™’s
is simple. However, there are a few important details to note. The cornerstone to connecting multiple
Grow1800s™ together is choosing one unit to be setup as the Site Master.
The Site Master performs several important tasks:
• It Controls all communications within the network
• It is the only unit that can broadcast Weather Station data to other iGrow1600/1800™’s
• It is the only iGrow1600/1800™ in the network that can be connected to a computer for remote
management.
• It sets the time & date for all iGrow1800s in the network
Wiring - Plan for the first installed iGrow 1800™ to be the Site Master. Once all units are installed in their
proper locations and all sensors tested, you are ready to connect the serial cable Regardless of which units will
be Zone Masters or Expansion units, all units must be wired together in a serial fashion as shown in figure 4.21.
Jumper Settings - Make sure to remove the blue jumper on the Site Master and any following controllers,
except for the last controller in the serial network chain. On the last unit of the network chain, the blue jumper
must remain installed, or the network won’t function properly. If you’re only connecting two iGrow1600/1800s™
together, remove the jumper from the first Site Master unit and leave it installed on the second unit.
Programming - The last step in setting up the network is programming each unit to be a Site Master, Zone
Master, or Slave (Slave units are also called Expansion units). Zone Masters and Slaves also need to know
which data to pull down from the network (such as weather station, temp probes, and zone setpoints). For
instructions on how to do this, please refer to “COMMUNICATIONS (Network Programming)” section of this
manual.
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Figure 4.21 Wiring Serial Network
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REMOVE BLUE
JUMPER
RED WIRE
GND WIRE
BLACK WIRE
Slave 1
Slave 2
Salve 3
It is essential to connect networked iGrow1400s in
a serial fashion (as shown above). Any other
configuration will prevent the network from
functioning properly.
Master
Master/Expansion wiring configuration
Correct
Site Master
KEEP JUMPER
ON LAST UNIT
IN NETWORK
CHAIN
Expansion Unit #2
Master
Slave 1
Master
Slave 1
Master
Slave 1
Slave 2
Slave 2
Slave 2
Slave 3
Slave 3
Salve 3
Master/Expansion wiring configurations
Incorrect
Expansion Unit #1
RED WIRE
BLACK WIRE
REMOVE BLUE
JUMPER
RED WIRE
GND WIRE
BLACK WIRE
iGrow 1800 Installation Guide
CONNECT TO SERIAL PORT
ON YOUR PC, OR SERIAL TO
USB ADAPTOR CABLE
RED WIRE
GREEN WIRE
ORANGE WIRE
Page45
BLACK WIRE
GND WIRE
RED WIRE
REFER TO THE INSTALLATION GUIDE PROVIDED WITH YOUR REMOTE MANGEMENT SOFTWARE TO COMPLETE THE
SOFTWARE INSTALLATION.
NOTES:
1. IF SEVERAL iGROW 1400™s ARE NETWORKED TOGETHER, THE PC MUST BE CONNECTED TO THE MASTER UNIT ONLY.
2. ONCE THE iGROW 1400™ IS WIRED TO THE PC, INSTALL THE REMOTE MANGEMENT SOFTWARE ON THE PC. PLEASE
RED WIRE
GND WIRE
BLACK WIRE
Connecting to a PC
To connect your iGrow1600/1800 to a PC, please see Figure 4.22
Figure 4.22 Connecting to a PC
Link4 (714) 524-0004
Programming your iGrow 1800
Before You Begin Programming
Before the iGrow 1800™ is programmed, it is recommended that the following steps are followed:
Hardware is properly installed and tested with manual switches.
All toggle switches have been restored back to the OFF state.
All the templates from Chapter 3: Control Strategies that are relevant to your application are understood and are
completely filled out.
Navigation
The iGrow 1800™ has a 7 button keypad. The behaviors of the keys are:
+
Used to edit (decrement) alphanumeric parameters. See also Browse Mode.
Used to edit (increment) alphanumeric parameters. See also Browse Mode.
Prev
Used to move backward from screen to screen in browser mode or to the previous entry in the “edit”
mode.
Next
Used to move forward from screen to screen in browser mode or to the next entry in the “edit” mode.
Back Used to move back up one menu level and save any changes that have been made.
Help
Pressing Help will give you hints for whatever page you happen to be on.
Enter/ Pressing this key initially goes to the menu screen and after that it is used to enter.
MENU subsequent highlighted screens. See also Browse Mode.
Note: When browsing through the menu, highlighted text signifies that it can be modified.
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Status Screens and Programming Screens
When operating the iGrow 1800 you will use Status Screens and Programming Screens.
Status screens show:
• Sensor readings (Inside Temp, Weather Station, Temp Probes, CO2)
• Equipment status
• Daily averages, etc.
Programming screens are where you setup and adjust:
• Equipment
• Setpoints
• Overrides
• Other settings important related to your greenhouse
The Navigation Menu Map on the following page shows all the primary screens.
Status Screens
Welcome Screen
Upon power up or a hardware reset (see Reset Controller for more information), the iGrow 1800™ will briefly
display the Welcome screen below. After 5 seconds, the iGrow 1800™ will automatically display the Main
Status screen.
Welcome to the
iGrow 1600/1800
V1.03.20
Copyright 2007
iGrow 1800 Installation Guide
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Main Status Screen
COOL2 SetPt 72.0+
InT 75.0°F RelHum
OutT 95.3°F 42% dh1
12:34P Tue 07/05/05
The main status screen displays the current status of your greenhouse zone. The numbers shown are only
sample numbers and will differ for each user, but a description for each display will be explained.
Note: Use the NEXT and BACK buttons to scroll through Status Screens.
Cool 2
This is the current temperature stage. It can go from Cool 6, to Normal, to Heat 6.
SetPt
This is the current setpoint for cooling, or if it’s in a heat stage, it will be the heat setpoint. For the Normal stage
both the lower and upper setpoints are shown, respectively.
Note: A + sign after the SetPt reading (72.0+) indicates Heat Boost condition.
Dehumidification/Humidification section for a description on Heat Boost.
Please refer to the
InT
This is the current indoor temperature reading from the indoor temperature sensor.
OutT
This is the current outdoor temperature reading, if you have an outdoor temperature sensor.
RelHum
This is the current humidity reading in the zone
dh1
This is the current dehumidification stage. The possible entries are (dh1, DH1, dh2, DH2, dhlt, DHLT, h, H, and
blank). Blank means that the humidity level is acceptable. If this field is highlighted, it means that the iGrow
1600/1800™ is in the dehumidification override mode.
Since the dehumidification control can be programmed to cycle on and off (See Dehumidification/Humidification
Section), the DH1 status indicator can cycle between DH1 and dh1, indicating that the dehumidification process
is on and off, respectively.
The last line displays the current time, day of the week and date at the bottom of the screen.
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Sensor Status Display
CO2 1000 ppm
Light 1000 W/m2
Wind SSE
15 mph
Rain
No
Temp1
77.0 °F
Temp2
79.4 °F
Temp3
69.8 °F
Temp4
71.2 °F
Temp5
70.5 °F
The Sensor Status Display screen(s) will show you readings for whichever sensors you have attached.
CO2
Current CO2 reading, in ppm.
Light
Current light reading. The light sensor is typically installed outdoors with a maximum reading of 2000
Watts/meter squared OR in Klux with a maximum of 120Klux.
Wind
This wind speed reading is displayed in miles per hour or kilometers/hour, along with the wind direction
display with one of 8 possible directions: N, NE, E, SE, S, SW, W, NW
Rain
The rain detector indication is either “Yes”-there is rain or “No”-there is no rain.
Temp Probe Number
You can have up to 5 temperature probes attached to your iGrow1800. By mapping your Input Settings,
you can assign each probe to whichever Temp Probe Reading (Temp1, Temp2, etc.) that you want.
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Equipment Status
01
02
03
04
Irr1
Irr2
Irr3
Irr4
6 Waiting
2
46
3
3:00p
39
58
05
07
09
12
CO2
Vent1
Curt1
Heater
Off
99%
40%
Off
Pressing the Next key again will display the status for each piece of equipment assigned to the various output
channels, up to 4 equipment status’ can be displayed simultaneously. The Next/Prev key allows you to page
back and forth between the programmed equipment status screens. An example follows:
These screens display the current status of the equipment outputs.
First column
This first column is the Channel number. Keep in mind that for Vents and Curtains, two channels are taken up.
In the example above, 7/8 are vent outputs and 9/10 are curtain outputs. Note that equipment #11 is not used,
thus it is not displayed.
Second column
The second column is the Equipment name assigned to that channel. Names are limited to 5 alphanumeric
characters.
Third column
The third column is the number of times that the respective output has been triggered in irrigation mode.
Fourth column
The fourth column is the current status reading of the equipment. Waiting indicates that the Irrigation output
configured in triggered mode is waiting for a trigger. In Accumulated light mode, the Irrigation output will display
the current accumulated light level. In scheduled mode, the Irrigation output will display the next scheduled start
time. In cycle mode, the Irrigation output will display the amount of time remaining (in minutes) until the next
irrigation cycle.
Note: When the text on the status screen is highlighted, this means the equipment is being overridden. See the
Equipment Override Section.
Yesterday’s Averages Status
Jun 21
InT
Hum
OutT
Avg Min Max
78 74 84
50 41 61
78 74 83
This screen displays the average, min, and max of InT (Inside Temperature), Hum (Humidity), and OutT
(Outdoor Temp) from yesterday. Yesterday is defined as 5:00AM (yesterday) to 4:59AM (today).
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Programming Screens
Begin Programming
From any Status Screen, press the ENTER/MENU key to enter programming mode. Press NEXT and PREV to
scroll up and down in this screen. To make changes to any of the items in the screen below, press ENTER.
System Setup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
System Setup (installation settings)
If you’re setting up your iGrow1600/1800 for the first time, then the first task is to program all applicable items
found under System Setup.
If the ENTER/MENU key is pressed while the System Setup field is highlighted, then the iGrow 1600/1800™
will display the Menu selection for the System Setup section of the iGrow 1600/1800™.
Cool/Heat Stages
Setup Deadbands
Setup Location
Outputs Control
VPD Settings
Cyclic Lighting
Setup Inputs
Setup Accumulators
Input Multipliers
Calibrate Inputs
Time/Date & History
System Units
Communications
Fallback Settings
Advanced Settings
Smart Cool Factors
Clear History
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Pressing the Enter key again will take you to the following screen:
Cool/Heating Stages
Cool Stages
Heat Stages
6
6
Stage Width 1.0ºF
On this screen you will select the maximum number of cooling and heating stages that you intend to use.
The up and down arrow keys are used to increase or decrease the amount of stages for cooling and heating. If,
for example, you select 2 heating stages, then in the remainder of the programming only 2 heating stages will
be displayed
The third selection is the Stage Width. This is the number of degrees between each of your stages, sometimes
referred to as “Stage Separation”. Typically, users select either 1 or 2 degrees.
Setup Deadbands
Cool Deadband 1.0ºF
Heat Deadband 1.0ºF
RelHumDeadband 3%
BHeat Deadband 1.0ºF
Deadband
This is sometimes called “hysteresis” band. For cooling, it is the number of degrees the temperature needs to
drop from the lower boundary of its current stage before it switches to the lower stage. Without Deadbands,
equipment tends to cycle frequently & constantly change stages when the temperature approaches the set
points. When a large value is used, setpoints may not be maintained. Typical values might be 1 to 2 degrees
F. For heating it is the number of degrees the temperature needs to rise above the temperature boundary
before it switches to a lower heating stage.
RelHum Deadband
This is the RH% the humidity must drop below the dehumidification threshold before exiting the dehumidification
state. It also is the RH% the humidity must rise above the humidification threshold before exiting the
humidification threshold.
Bheat Deadband
This is the number of degrees that the bottom heat temperature must rise above the bottom heat temperature
setpoint or threshold before the heat valve switches off. Typical values might be 1 degree F or less.
Setup Location
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Latitude
34 N
Longitude 118 W
The iGrow 1800™ has an internal astronomical clock. By knowing the actual coordinates, sunrise and sunset
times can be precisely calculated. Go to www.heavens-above.com to find coordinates for your precise location.
If a negative longitude is given you are west, and if a negative latitude is given you are south.
Outputs Control
Rain Hold Time: 01 m
Cmd Delay: 01 m 00 s
Irr Mode Concurrent
Irr Delay 00 m 05 s
Start Delay 01m 00s
Rain Hold Time
Rain Hold Time is a parameter that lets you choose how long you want the rain override condition to persist
after the rain status goes from Yes to No. This is to keep intermittent rain from causing the vents to keep
opening and closing.
Cmd Delay
Cmd Delay is the time between commands to change the equipments’ states. It is the shortest time permitted
for switching equipments. Typical update times are from 1 to 2 minutes. This parameter is used to minimize the
cycling of the equipment.
Irr Mode
Irr Mode is either Concurrent or Sequential. You can choose between the two options by pressing the + or key. These options apply if you program more than one irrigation valve to trigger based on accumulated light or
a dry contact switch closure, or if you select the cycling (misting) option. If you select Concurrent, then the
valves will turn on immediately when requested regardless of how many are already on. If you select
Sequential, then the first one will turn on but if other valves are to come on, they will wait in queue and each one
will come on in succession. (Also see Jumper section to make sure your settings are correct).
Irr Delay
Irr Delay forces a user definable delay between the valves. In other words, when the current On valve goes Off,
the next valve in the queue will wait the selected min and sec before it turns On.
Start Delay
This is the time duration upon a power startup before the first equipment can turn on. This is important when
you have multiple controllers in the event of a power outage. Each controller should be set with a different start
delay.
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VPD Settings
V
VPD Settings
Media Sensor Temp11
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.
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In the Concurrent mode, all the channels will come on at the same time. Typically, the Start Delay will
be set to 0:00 and the Finish Delay will become the Off Time. See Diagram below:
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Setup Inputs (sensor mapping)
InT ⇚ SerialSns1
OutT ⇚ SerialSns2
RelHum ⇚ SerialSns1
CO2⇚ AnalogIn6
OLight ⇚ Solar
InLight ⇚ None
WinSpd ⇚ FDIn1
WinDir ⇚ AnalogIn7
Rain ⇚ FDIn2
Snow ⇚ None
BkUp InT ⇚ None
Pressure ⇚ None
IrrTrig⇚ DigitalIn1
OutHum ⇚ SerialSns2
Temp1 ⇚ AnalogIn1
Temp2 ⇚ AnalogIn2
Temp3 ⇚ AnalogIn3
Temp4 ⇚ AnalogIn4
Temp5 ⇚ AnalogIn5
VPos1 ⇚ AnalogIn1
VPos2 ⇚ AnalogIn2
VPos3 ⇚ AnalogIn3
VPos4 ⇚ AnalogIn4
VPos5 ⇚ AnalogIn5
pH1 ⇚ AnaIn1
pH2 ⇚ AnaIn2
pH3 ⇚ AnaIn1
pH4 ⇚ AnaIn2
5uS EC3 ⇚ AnaIn3
Soil1 ⇚ None
Soil2 ⇚ None
Soil3 ⇚ None
Soil4 ⇚ None
Soil5 ⇚ None
Generic1 ⇚ None
Generic2 ⇚ None
Locl Tmp ⇚ None
Locl Hum ⇚ None
Setup Inputs is where you tell your iGrow1600/1800™ what sensors you are using (this is also called sensor
mapping). The screen above shows the typical sensor mapping for each sensor. If you don’t have a particular
sensor then leave the setting as None.
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Note: For Zone Master and Slave units, you should set all weather station sensors (OutT, OLight, WindSpd,
WindDir, and Rain to Remote. Setting the weather station sensors to Remote means the Slave unit or
Zone Master will get their weather station data remotely from the Site Master.
PREV and NEXT keys move the cursor from one input selection to the next. Using the + and - keys you can
select which one of the input channels to assign to your sensors. Note that the allowable choices vary from one
type of sensor to another. If any given sensor is not present, None should be selected. The Software choice is
useful for testing and debugging if you just want to force the reading to a particular value. The software value
can be modified through the Calibration Inputs screen below.
The Backup Sensor is an optional way to tell the iGrow 1800™ which sensor it should default to in the case of
a failure on the InTemp temperature sensor.
Note: For the Backup Sensor to be used, to must be Enabled. See also Fallback Settings below to Enable the
Backup Sensor.
Setup Accumulators
Accumulator 1
Sensor: None
Operating Period:
24 Hour
There are two accumulators that can be used. They can be used for the outdoor temperature influence
on the indoor temperature setpoint or in conjunction with auxiliary controls. Any of your sensors can be
utilized for the accumulation purposes.
There are two operating period options: 24 Hour or Setpoint Change: If the 24 hour period is selected,
then the accumulator begins at 12:00 AM and ends the accumulation at 11:59 PM. The data is logged
and time stamped and the accumulator is reset. If the Setpoint Change option is selected, then the
accumulator begins at the start of a setpoint interval and the accumulator is reset at the end of the period.
Input Multiplier
Multiplier
Raw Val
Factor
Adj Val
OLight
0 W/m2
1.000 x
0 W/m2
The Input Multiplier option is for calibrating the outside light sensor (above) or a CO2 sensor (below), if
you have one. The Raw Value is the actual reading from the sensor. The Factor for the light sensor is
the multiplier adjustment. Use the + or - keys to move the value up or down from 1.0. The Adjusted
Value is the product of the Raw Value and the Factor. The adjusted value will be the one reflected on the
front screen.
Multiplier
Raw Val
Factor
Adj Val
iGrow 1800 Installation Guide
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CO2
0 ppm
2 LSB
0 ppm
Link4 (714) 524-0004
CO2 LSB
The Factor for the CO2 adjustment is the Tuning range. It determines the complete range of a CO2 sensor.
For example, a 2 means the CO2 range will be 0-2000ppm, a value of 3 would set the range to be 0-3000ppm.
Calibrate Inputs
Calibrate
Raw Value
Adjust
Adj Value
InTemp
73.6ºF
0.5ºF
74.1ºF
Calibrate
To calibrate an input you must first select the sensor you want to calibrate. Press the + or - keys to cycle
through the various sensors. Once you have selected your sensor, press enter and it will take you to the
adjustment line.
Raw Value
Raw Value is the direct reading from the sensor. Using the + or - keys will add a positive or negative adjustment
to the raw reading giving you an adjusted value.
Adj Value
Adj Value is what will be reflected on the front status screen.
Time/Date & History
Time 12:17P
Date 04/26/2005 Tue
DaylightSavings Yes
Log Hist: 00:01 h:m
Time
Time adjusts the current time by highlighting the field and pressing either the + or - keys. This will allow you to
scroll through the entire 24 hours.
Date
Do the same for the date. Press Enter to go from field to field and adjust the correct date.
Daylight Savings
If you want the program to automatically adjust itself for Daylight savings time, select YES. If not, select NO.
Log History
This option lets you choose how often the controller will log sensor and equipment history information. In this
case it saves log history every minute, but can be changed to different lengths of time. If you put 00:00, then it
will save information every second.
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Note: In the United States and Canada Daylight Saving Time begins on the second Sunday in March and
reverts back to standard time on the first Sunday in November.
System Units
System Units
Temperature ºF
Wind Speed
mph
Light
W/m2
Temperature
Choose either degrees Fahrenheit (ºF) or degrees Centigrade (ºC).
Wind Speed
Choose either miles per hour (mph) or kilometers per hour (km/h).
Light
Choose either Watts/meter2 or klux.
Communications (Network Programming)
Once multiple iGrow controllers are wired together (as shown in Figure 4.21), you will need to set up each iGrow
1800’s program settings for proper communications. Note that the most important iGrow1600/1800 in the
network is the one you choose to be the Site Master. The Site Master controls all network communications and
is the only unit that a Weather Station and PC can be connected to.
Site Master
To setup your Site Master press
Enter/Menu  System Setup  Communications. Under the “
Communications” screen you’ll find several editable fields. By default the text Disabled will be highlighted. Use
the + and - buttons to change this setting to Site Master. Now press the BACK button three times (or until you
see the Main Status screen) to save your changes. That is all that’s necessary to setup the Site Master. Your
Site Master is now ready to communicate with you network and PC.
iGrow-to-iGrow Link
Site Master
Zone 1
Channels 01 to 12
Use Local Setpoint
Zone Master
To add a Zone, simply set a unit to Zone Master, You can set the Zone number, and choose to use its own
“Local setpoints” or the Site Masters “Remote setpoints”. Now press the BACK button three times (or until
you see the Main Status screen) to save your changes.
•
•
Local setpoints are the setpoints on the Zone Master itself
Remote setpoints are the setpoints of the Site Master Unit
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iGrow-to-iGrow Link
Zone Master
Zone 2
Channels 01 to 12
Use Local Setpoint
Note: Be sure that ZoneMaster Units are set up in sequential order. For Example, if you have three Zone
Masters, set their zone numberto be in order i.e. 2,3,4. DO NOT jump over one such as 2,4,5. The
iControl software will not function properly.
Slave Unit
For Slave Units (also called Expansion Units), set to Slave Unit. Then set which zone the unit will be an
expansion unit to, i.e. Site Master Zone 1, or some other Zone Master. Since each zone can have up to 3
Expansion Units you must also decide which expansion unit it is.
•
•
•
Expansion Unit Outputs 13-24
Expansion Unit Outputs 25-36
Expansion Unit Outputs 37-48
Note: Be sure that Expansion Units are set up in sequential order. For Example, if you have only two
expansion units be sure to set one as 13-24 an the other to 25-36. DO NOT jump over one such as 1324 and 37-48. The iControl software will not function properly.
iGrow-to-iGrow Link
Slave Unit
Zone 1
Channels 13 to 24
Use Remote Setpoint
Similar to a Zone Master, you can choose to use Local or Remote Setpoints. But in this case, if you choose
Remote setpoints, the Expansion unit will use the Zone Master’s setpoints NOT the Site Master’s setpoints.
Now press the BACK button three times (or until you see the Main Status screen) to save your changes.
Note: Once you setup the Site Master, Zone Master(s) and Expansion Unit(s), you should label the front panel
on each unit for easier reference in the future.
Fallback Settings
Fallback
Sensor
Enabled
High Alarm Disabled
Force to
NORM
Sensor
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This feature is used if there is an InTemp sensor failure and you want the controller to fallback into utilizing the
backup Sensor (OutTemp, or other temp sensor you have defined in the Setup Inputs section). By choosing
the fallback option to Enabled mode, the controller will automatically detect an InTemp sensor failure and fall
back to the backup Sensor. If Fallback is Disabled, then there is no action to utilize a backup sensor and the
iGrow 1800 will engage the Force to condition.
High Alarm
If you enable the High Alarm, the iGrow will trigger an alarm upon temp sensor failure.
Force to
In case of a Fallback failure scenario, or if Fallback is Disabled, the third level of safety is to force the iGrow
1800 into any stage automatically. In the example screen above, the iGrow 1800 would engage whatever
equipment you have assigned to be ON under NORM conditions.
Advanced Settings
MixValve Param Hide
Equipment Delay 3 s
Error Report
Hide
Comm Diag Scrn Hide
Curtain Energy Mode
Light Hyst
50%
Temp Hyst
+ 5ºF
Heat Demand Show
Cool Demand Show
Heat Offset
5.0 F
Cool Offset
5.0 F
Gen1 Filter Samples
06
Generic Sensors
Precision Units
G1
d.dddd inH2O
G2
d.dddd inH2O
Gen PID Multiplier
P
0100x
I
00.1x
D
0001x
Bump
ENABLED
Bump Hold
5m
AutoDetect ON RESET
Reset Error
Hide
Temp Delta
5.0 F
Temp Delay 00m 00s
BHeat Delay 00m 00s
Loud Vent Disabled
Advanced
If you wish to use PID Mix Valve operation then the MixValve Param option must be set to from Hide to Show.
This will activate two additional menu screens located under the MixV equipment type menu. Use the + and keys to change setting from Hide to Show.
Equipment Delay
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Time the iGrow1800 will wait to switch from one equipment to the next
Error Report
This is for diagnostic purposes and it is advisable to contact Link4’s technical support for more details.
Comm Diag Scrn
By toggling this field to Show, a status screen will become visible that allows you to see if this iGrow is
communicating with other iGrows on the network
Curtain Energy Mode
Light Hysteresis only applies to curtains in Energy Mode. Once a curtain closes, for it to reopen due to
light, the new light reading must be higher than the close value by: Close Value times Hyst value plus the
Close Value.
For example, let’s say the Hyst Value is 50%. If the curtain closes at 100W/m², then to reopen it the light
level must reach 150 W/m² (or 100x50% + 100).
Temp Hysteresis is similar to Light Hysteresis, and only applies to curtains in Energy Mode. Once a
curtain closes, for it to reopen due to temperature increase, the new temperature reading must be higher
than the close value by: Close Value plus the Temp Hysteresis value.
For example, let’s say the Hyst Value is +5ºF. If the curtain closes at 70ºF, then to reopen it the
temperature level must reach 75ºF (or 70+ 5).
Note: Regardless of what causes a curtain to close, during energy mode either Light Hyst or Temp Hyst can reopen it.
Heat Demand
Toggling this field to Show makes the Heat Demand visible in the status screens
Cool Demand
Toggling this field to Show makes the Cool Demand visible in the status screens
Heat Offset
Heat Offset is a calibration factor for your heat demand
Cool Offset
Cool Offset is a calibration factor for your cool demand
Gen1 Filter Samples
The number of samples over which the filter operates is controllable with the Generic 1 sensor. A typical
number is 6 samples. The average over the samples is a running average, meaning as one sample gets
dropped off another gets added. The same adjustable number of sample option does not exist for Generic 2
sensor.
Generic Sensors – Precision Units
For a number of sensor types, you can set the range of measurement and the units. The first entry is the range
which goes from d.dddd to ddddd. You select the units for the sensor in the 2nd entry. The options are as
follows:
In H2O
V (Volts)
Ma (Milli amps)
Count
%
ºF
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ºC
k lux
W/m2
Km/h
Mph
ppm
hPa (hector pascals;, 1hPa = 1 millibar)
kPa (kilopascals)
Gen PID Multiplier
The P, I and D parameters for the generic PID controller can be scaled with the use of the multiplier
option.
Bump
Enabling the Bump option provides for the automatic re-calibration of the proportional devices position in the
event that it becomes out of sync with what the computer thinks is the position. Through the bump feature this
re-calibration occurs whenever the proportional device returns to either the close or full open position
Bump Hold
This is the time period that the bump feature is engaged when at the close or full open position.
AutoDetect
When you have multiple iGrow controllers connected together, you can set how often the Master controller
checks the network to see if another controller has been added, or if one is lost. Your choice is either every 5
min. or on reset.
Reset Error
This feature is used for testing & troubleshooting. If you are having communication problems, turning this to
Show will display error messages I the status screens.
Temp Delta
This is a indoor temperature sensor filter to reject erroneous sensor readings. If a temperature reading
spikes, say it is 5 ºF above or below the previous reading, then it will be rejected. The number of degrees
is programmable. See also Temp Delay below.
Temp Delay
If several samples in a row fall outside the above Temp Delta and the time exceeds this Temp Delay,
then what was rejected is instead accepted.
BHeat Delay
The length of time entered here applies to the bottom heat temperature in the same way as the indoor
temp sensor applies above.
Loud Vent
This applies to a system with Variable Frequency Drive (VFD) fans and vents. When the Loud Vent
option is enabled, there will be no zone temperature/stage change updates while the
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SmartCool Factors
SmartCool Number
1
Ku Gmax Kd Gmin
20 20
1
5
Smart Cool uses the outside temperature and light data to assist in making intelligent cool staging decisions for
the most efficient control of your greenhouse. In the first level of screens, there is a similarly named panel called
Smart Cool Settings. SmartCool Factors and Smart Cool Settings panels are related to each other. In the
Smart Cool Settings panel there are 10 possible settings you can choose from, each one determining how
aggressively your iGrow will respond to changing weather conditions. SmartCool Factors are the detailed
settings for each of the 1-10 Smart Cool Settings.
Note: Smart Cool Factors are settings related to how quickly your greenhouse heats up and cools down. The
iGrow 1800 allows you to adjust the Smart Cool Factors, but it is NOT RECOMMENDED TO CHANGE
THE DEFAULT SETTINGS. To use Smart Cool, you should only adjust the 1-10 values found in the
Smart Cool Settings panel. For further information on Smart Cool, please contact Link4.
Clear History
Press <ENTER> to
clear History Log.
Press any other key
to exit.
The Clear History option is made available to erase any previous history log that is undesirable. Press Enter to
clear history log and then press the Back key to save and exit.
Resetting the Controller
Hard Reset- If your controller ever freezes, use a long pin to press the reset button (though the small hole on
the front panel labeled Reset). This will refresh the controller. This is a safe operation and will not cause you to
lose any programming or configurations.
Factory Default Reset- if ever wanted, or is necessary, you can reset the iGrow 1800TM to its factory default
settings. To do this, unplug or press the reset button, then immediately press and hold the “Back” and “Enter”
buttons simultaneously while the unit restarts. After doing so, the controller will say “iGrow 1800 Restoring
Default Configurations………” It is suggested that if you have the iGrow Remote Management Utility (RMU)
software, use it to save your configurations before making a factory default reset. Then, you can use it to
quickly restore all your settings.
Warning: You will lose all configuration data if a Factory Default Reset is performed.
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Setpoint/Time Period Programming
SystemSetup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
Setpoint 1
Enabled
Start 6:00A Ramp30m
Temp 68.0 to 72.0ºF
RelHum 10 to 80 %
Start Times
You have up to 8 setpoint start times available to use within a 24 hour time period. You can cycle through each
of the eight start times with the + or - keys.
Pressing Enter takes you to the Enabled or Disabled option. Setpoint 1 is always enabled. Setpoint’s 2-8 are
disabled. You may enable them by use of the + key.
Note: If you only have day and night setpoints, you will only use Setpoint 1 and Setpoint 2, the other two will
remain disabled
The Start time is when the heat and cool temperature setpoints temperatures are engaged. The start time is
either a fixed time or it can vary daily based on the increase or decrease in day length. This day length is an
Astronomic Adjustment based on the latitude and longitude entries that you made as shown in the Setup
Location portion of this manual.
By pressing the + key at the Start Time entry, you will get the following:
Press + once = SRise
Press + twice = SSet
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You would use the Srise option for the setpoint that you program at the beginning of the day. Similarly, you
would use the Sset option for the end of the day setpoint. The adjustment will be made each midnight and so
everyday you will see a change in the “Start Time”.
Ramp Time
The ramp time enables a smooth transition of the target temperatures between the time periods. If the ramp
time is set to 0 there will be an immediate step transition in the set points from the previous from the current
setpoint to the following time period. If the ramp time is not zero, the ramping begins at the end of the time
period (see Fig 2.1 for reference).
Heat and Cool Setpoints
The third line is where you enter the heat and the cool setpoints, that is, the low temperature and the high
temperature targets.
Humidity Setpoints
The humidity range is shown on the fourth line. If the humidity is below the lower value, you enter the
humidification stage. If humidity is above the higher number you go into the dehumidification stage.
Advanced Setpoints
SystemSetup
Setpoint/TimePeriod
Setpoints Advanced
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
Influence Factor
Drive to Average
Heat/Cool Setpoint Influence Factors
The influence factor is a feature designed to enable a sensor, typically outdoor temperature or light, to
automatically do an adjustment of the cool temperature or heat temperature setpoint. For example, if the
outdoor temperature falls below x ºF, you may want to boost the heat temp setpoint by y degrees.
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Factor Type:
Heat
Status:
Disabled
Condition Sensor:
OutTemp
Factor Type: Select Heat or Cool Setpoints that are to be influenced
Status: Either Enable the influence or Disable it
Condition Sensor: Select which sensor that you want to drive the influence
Offset
1:
0.0 ºF
Condition 1:
-0.0 ºF
Offset
2:
0.0 ºF
Condition 2:
-0.0 ºF
Offset 1 is the setpoint adjustment if the influence sensor reading is greater than the Condition 1
Offset 2 is the setpoint adjustment if the influence sensor reading is less that Condition 2.
Temperature Drive to Average Control
Drive to Average will adjust the night setpoints so as to maintain an overall daily average target
temperature.
Influence Factor
Drive to Average
Selecting Drive to Average brings you to the following screen
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Drive to Average
Disabled
Target Temp: 70.0ºF
Max Fail Days: 3
The Drive to Average option can be either Enabled or Disabled. Enabling it engages the option.
The Target Temp is the average temperature you are trying to achieve.
The Max Fail Days is the number of successive days that the target temperature cannot be achieved
after which adjustments are made automatically to the day setpoints.
Allowable Target
Deviation: 1.0 ºF
Max Adjustment Size:
5.0 ºF
The Allowable Target Deviation is the number of degrees that the average temperature is allowed to
vary from the setpoint before a fail day is signified.
The Max Adjustment Size is the maximum number of degrees by which a setpoint adjustment can be
made.
Programming Equipment
This is where you program each piece of equipment connected to the various outputs (channels) of your
controller.
System Setup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
After you press the Enter/Menu button you will get the following screen, if this is the first time programming this
channel.
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01
Name1
None
This channel has no
selected equipment.
Press the Enter/Menu button a second time and you will see the following screen:
01
Name1
None
This channel has no
selected equipment.
This time channel 01 is highlighted. Use the + and – buttons to cycle through all the channels on the controller
or to find the channel that you want to program or edit.
Once the channel is selected, the next two steps are to name the channel (usually named by the equipment
type it’s controlling), and to set what kind of equipment it is.
For un-programmed equipment, there are two editable choices: the name field and the equipment type field.
Press the Next or Enter buttons to name the channel. Press the + key and the alphanumeric character list is
displayed. Use the + or – keys to select your character and press Next to go to the next one. When finished
press the Back key. The names are restricted to 5 alphanumeric characters.
Press the Next key to select the equipment type to be assigned to the channel. Again use the + or – keys to
cycle through the equipment type field that has the following equipment types:
On/Off –
Irrig –
CO2 –
Light –
MZone –
On/Off may be programmed on any channel
Irrig may be programmed on any channel
CO2 may be programmed on any channel
Light may be programmed on any channel
MZone (or Microzone) is an On/Off type device with its own setpoints and temp sensor (temp probe
only). It is an independent thermostat output with Day/Night settings. It can be programmed on any
Channel.
Pump - Pump may be programmed on any channel.
G PIDThis Generic PID controller may be programmed on any output.
Vent –
Vent may only be programmed on any two consecutive channels, the first channel being an odd
number and the second it’s neighboring even number (for example: channels 1&2 or 3&4 are
acceptable pairs, but 2&3, or 8&9 are not)
Curtain – Curtain may only be programmed on any two consecutive channels, the first channel being an odd
number and the second it’s neighboring even number (for example: channels 1&2 or 3&4 are
acceptable pairs, but 2&3, or 8&9 are not)
MixV – MixV may only be programmed on any two consecutive channels, the first channel being an odd
number and the second it’s neighboring even number (for example: channels 1&2 or 3&4 are
acceptable pairs, but 2&3, or 8&9 are not)
PZone – PZone (In some versions this is referred to as PZONE) is a special purpose Mixvalve, and is a
proportional controlled MicroZone. It may only be programmed on any two consecutive channels,
the first channel being an odd number and the second it’s neighboring even number (for example:
channels 1&2 or 3&4 are acceptable pairs, but 2&3, or 8&9 are not) It is an independent thermostat
output that can control modulating heat valves.
VOut – VOut is a variable voltage or current output for equipments such as variable speed fans. This option
only appears if you have installed the optional iMOD (Multi-Output Device) expansion board.
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Editing Note: If you have already programmed a channel and wish to change either the name or the
equipment type you can do so as follows:
Go to the Program Equipment screen, press Enter to highlight a channel. Press + or – keys to
select the channel that you want to edit. Then press the Prev button to edit the equipment type and
press Prev again to edit the equipment name.
Now we will go through and show you how to program each of the equipment types listed above.
ON/OFF Equipment
02
ExFan
OnOff
Heat
Cool
654321 N 123456
000000 0 011111
The iGrow 1600/1800™ supports On/Off devices with up to 6 heating and 6 cooling stages. 1 to turn equipment
ON and 0 to turn it OFF. Use the + or – keys to toggle the On/Off condition for a particular stage.
In the above example, we have the exhaust fan coming on beginning with the second stage of cooling and then
continuing on in the remaining six cooling stages.
Note: If in the Cooling/Heating Stage setup you selected fewer than 6 stages, then only the number of stages
that you selected will appear for the On/Off devices and Vents (Refer to Cool/Heating Stages Setup to set
how many stages are desirable).
This second screen can be programmed for various applications which we will discuss below.
02
ExFan
OnOff
No Pump
AC Override Disabled
For now we will leave the default, No Pump and leave the Active Cooling (AC) Override Disabled.
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02
ExFan
OnOff
Cycle Disable
Cycle On 00 :00:00
Cycle Off 00 :00:00
This third screen provides you with the option of cycling on and off the On/Off output (in this example, an
Exhaust Fan). The cycling, if enabled, only occurs when the temperature stage calls for the equipment to turn
on. For example, in the first screen shown above, this would only occur in cooling stages 2-6. The cycle times
are in hours, minutes and seconds.
Now if we go back to the 2nd screen above and Enable the Active Cooling (AC) Override function, as shown
below,
02
ExFan
OnOff
No Pump
AC Override Enabled
A fourth screen is opened up as follows:
02
ExFan
OnOff
AC
Heat
Cool
OVR- 654321 N 123456
Ride 000000 0 000000
This is an override screen which is conditioned on the AC override being active.
Suppose you have two systems for cooling in the same greenhouse compartment. One system with vents and
fans, another with chilled water. When the chilled water cooling comes on, you will want the house sealed up
and the exhaust fans to turn off. This override screen, gives you that flexibility for the fans. A similar screen will
be shown below in the vent programming section.
Irrigation Programming
01
Mode:
Valve1 Irr
Scheduled
Hr mm ss
OnTime:
00:00:00
Each channel programmed for Irr (irrigation) can be programmed independently. The first selection is the
Mode. Pressing the + or – keys cycles you through the mode choices. There are six choices defined as
follows:
Scheduled
This mode is like a time clock where you set the start time, run time and days of the week.
Accumulated Light
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In this mode the irrigation cycle is triggered when the accumulated light or “light sum” reaches a threshold or
when the off time limit is reached.
Cycle
With this option, the irrigation valve is cycled continuously during the time window with an On time and an Off
time that you get to select.
Trigger
This option lets you trigger the irrigation based on an external input. This input could be a wall switch, a
moisture sensor, a weighing scale or any on/off input.
Soil Trigger
This option is based on a soil moisture sensor as a trigger. The soil moisture threshold is set and when
triggered, the irrigation valve turns on for the user programmable time.
VPD (Vapor Pressure Deficit)
In this mode you define the VPD threshold at which the irrigation valve is turned on for the user
programmable time.
Scheduled Irrigation
01
Mode:
Irr01
Irr
Scheduled
hr mm ss
OnTime: 00:00:00
01
Irr01
Irr
7:00A 8:00A 12:30P
4:00P
Off
Off
Scheduled Irr Times
01
Irr01
Irr
SMTWTFS
SMTWTFS
1010101
0101010
Scheduled Days
Scheduled mode allows the iGrow 1800™ to turn the Irrigation channel on for a duration equal to OnTime at up
to six start times per day. Use Off to indicate unused time slot. The third screen allows for enabling or disabling
scheduled irrigation for an entire day. A “1” indicates that irrigation is enabled for that particular day, and a “0”
means irrigation is disabled for that day. Two weeks are given, so that the iGrow 1800™ can be configured to
irrigate every other day.
In the above example, the equipment, named Irr01, is scheduled to turn on for 2 minutes, every other day of the
week, at 7a.m., 8a.m., 12:30p.m., and 4p.m.
Note: These times are not astronomically adjusted.
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Accumulated Light Irrigation
02
Mode:
Irr02
Irr
Accum Light
hr mm ss
OnTime:
00:00:00
Accumulated light mode allows the iGrow 1600/1800™ to turn the Irrigation channel on for a duration
equal to the OnTime.
02
Irr02
Irr
Start _SRise 07:00A
End
at
07:30P
Accum Light
The irrigation valve will only turn on between the Start time and End time and will only do so when the
appropriate amount of light has been accumulated. Both of the start and end times can be astronomically
adjusted to vary with respect to either sunrise or sunset. Please note that if the accumulation does not reach
the threshold at the end of the time window the accumulation will still continue, however, if the threshold is
reached outside the time window, irrigation will not take place until the beginning of the next active time window.
02
Irr02
Irr
6000 W/m2h at 55°F
3500 W/m2h at 85°F
Max Off 8:00 hh:mm
In the third screen you will need to set the accumulated light threshold. You have the option of setting it as a
function of the air temperature. For example, you might have a threshold of 6000 w/m2-hr at a temperature of
70 ºF and a threshold of 5550 w/m2-hr at an air temperature of 80 ºF. The threshold will then be a straight line
interpolation between the two temperature thresholds. Note: If you don’t want it set as a function of
temperature, then simply make the two accumulated light entries the same.
S1 = 6.0 kW/m2 at 85°F
02
Irr02
Irr
6000 W/m2h at 55°F
3500 W/m2h at 85°F
Max Off 8:00 hh:mm
S2 = 3.5 kW/m2 at 55°F
The crosshairs represent the irrigation trigger point.
This location will change as the actual temperature
changes
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The last entry is the Max off time. This is similar to a safety net. In the event that the accumulated light is below
the threshold when the maximum off time is reached, irrigation will take place anyway and the accumulator will
be reset.
Note: In order to use this feature properly, there has to be a light sensor attached to the iGrow 1600/1800™
and it must be mapped correctly in the Setup Input screen.
Cycling Irrigation
03
Irr03
Irr
Mode: Cycle
hr mm ss
OnTime:
00:00:00
When you select this option you will get the following screen: The cycling option is for turning on and off a valve
at some repetition rate during a time window. As with the other options, your first entry is the OnTime for the
valve.
On Time
Off Time
Cycle Time
03
Irr03
Irr
Start __at__ 09:00A
End
at
07:00P
Cycle
00:00 hh:mm
In the second screen above you will set the time window with Start and End times. The start and end times can
be fixed or they can be related to Sunrise or Sunset. You can cycle through the three options by pressing the
+ key when the cursor is over the at.
The Cycle Time is the combination of the On time and the Off time added together.
Trigger Irrigation
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04
Irr04
Irr
Mode: Trigger
hr mm ss
OnTime:
00:00:00
The external trigger option is designed to turn on your irrigation valve(s) from an external switch such as a
momentary wall switch or a lysimeter. The external trigger input should already be assigned in the Setup Inputs
screens. See Setup Inputs Section for more details.
Note: The iGrow 1600/1800™ digital input has an internal 10K pull up resistor to +3.3V. If the external trigger
input is pulled low by an external device for more than 50 msec then the input is deemed valid.
04
Irr04
Start __at__
End
at
Trigger
Irr
09:00A
07:00P
The iGrow 1800™ enables the external trigger only between the Start and End times. These two time values
can be astronomically adjusted with respect to either sunrise or sunset.
Soil Trigger Irrigation
The Soil Trigger irrigation option is designed to turn on your irrigation valve(s) from an input threshold
being reached. An example of such a device is a “soil moisture” sensor.
04
Irr04
Irr
Mode: Soil Trig
hr mm ss
OnTime:
00:00:00
The first screen is where you set the valve OnTime once the threshold is triggered.
04
Irr04
Start __at__
End
at
Soil Trig
Irr
09:00A
07:00P
This second screen is where you set the time window during which you will allow the irrigation valve to be
triggered. If the threshold is reached outside this time window, the irrigation will be triggered at the start
of the time window. Both the start and stop times can be fixed times by selecting the at option or they
can be based on Sunrise and Sunset.
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04
Irr04
Irr
Input
Soil5
Threshold 0.0% VWC
OffTime 00:00 hh:mm
The third and final screen is where you select the trigger sensor and the threshold for turning on the
irrigation valve. The threshold is a Volumetric Water Volume (VWC) percentage. It corresponds to an
input of 0 to x Volts DC.
The OffTime is the maximum off time that you will permit. If the threshold is not reached by the end of
this time, the irrigation valve will be turned on as though the threshold was reached. This is a backup
position in case the sensor is not operating correctly or was inadvertently removed.
Vapor Pressure Deficit (VPD) Irrigation
Vapor pressure deficit (VPD) is the difference (referred to as deficit) between the amount of moisture in
the air and how much moisture the air can hold when it is saturated. Therefore,
VPD = VP(SAT) – VP(Air)
The iGrow 1600/1800 calculates the VPD based on the temperature and humidity sensors in the
greenhouse.
04
Irr04
Irr
Mode: VPD
hr mm ss
OnTime:
00:00:00
The first screen is where you set the valve OnTime once the VPD threshold is reached.
04
Irr04
Start __at__
End
at
VPD
Irr
09:00A
07:00P
This second screen is where you set the time window during which you will allow the irrigation valve to be
triggered. If the VPD threshold is reached outside this time window, the irrigation will be triggered at the
start of the time window. Both the start and stop times can be fixed times by selecting the at option or
they can be based on Sunrise and Sunset.
04
Irr04
Irr
Threshold
0.00 inHG-Hr
Max Off 00:00 hh:mm
The third and final screen is where you select the VPD threshold for turning on the irrigation valve. The
threshold is an accumulated pressure measurement input as in HG-Hr .
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The OffTime is the maximum off time that you will permit. If the accumulated VPD threshold is not
reached by the end of this time, the irrigation valve will be turned on as though the threshold was
reached. This is a backup position in case the sensor is not operating correctly or was inadvertently
removed.
CO2 Equipment
05
CO2
Start __at__
End
at
CO2
09:00A
07:00P
The iGrow 1800™ can also be used to regulate the amount of CO2 inside the greenhouse by controlling CO2
pumps or injectors. This mode is active between the Start and End times. You have the option of controlling
the Start and End times based on a fixed time window or a relative time window. The latter is relative to the
sunrise and sunset times. When the cursor is over the at position and you press the + or – keys, you will cycle
through the three options: SRise, SnSet, and at.
When you set the parameters up for the first time as shown in the above screen, the Start and End times will be
adjusted every day thereafter, at 2 AM, to track the shortening and lengthening of the days.
Note: It does not mean that the Start is exactly at the sunrise time, or the End at exactly at the sunset times.
You can select any time window. What it means is that the daily adjustment is per the change in the
sunrise and sunset time amounts. When the days get longer, the sunrise rise time will be earlier each
day and the sunset time will be later.
05
CO2
CO2
Min CO2 0 ppm
Max CO2 0 <=HEAT6
Min OLight
0 W/m2
Within the active time period, the iGrow 1800™ will inject CO2 to the Min CO2 Level, which is the minimum CO2
level.
The iGrow 1600/1800™ will also inject CO2 to the Max CO2 Level, within the active time period, if both of the
following conditions are met:
1. The current cooling/heating stage is less than or equal to the indicated stage, where
H6<H5…<N<C1<….C6. This means that the iGrow 1600/1800™ will not inject CO2 up to the Max CO2
Level for cooling stages above the indicated stage. This can be used to prevent excessive loss of CO2 due
to high fans and opened vents.
AND
2. The current light level must be above the programmed Min Outdoor Light threshold.
Note: This mode requires the installation of the optional CO2 sensor and CO2 pump. If there is no light sensor
present, the iGrow 1600/1800™ will inject the CO2 to the Max CO2 Level assuming the condition (1)
above is satisfied.
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Light Equipment
The iGrow 1600/1800™ can be used to control lights (typically HID) in the greenhouse. There are four
operational modes that you can program. These are:
•
•
•
•
Supplemental
Scheduled
Cyclic
Daily Light Integral (DLI)
06
HID
Light
Select Operational
Mode: Supplemental
You can press the enter key and highlight the Mode: With the plus key you can toggle between the four
options.
Supplemental Light control
06
HID
Light
Start
at
09:00A
End
at
07:00P
Use OLightSensor No
Supplemental mode is active between the Start and End times. You have the option of controlling the Start and
End times based on a fixed time window or a relative time window. The latter is relative to the sunrise and
sunset times. When the cursor is over the at position and you press the + or – keys, you will cycle through the
three options: SRise, SnSet, and at.
When you set the parameters up for the first time as shown in the above screen, the Start and End times will be
adjusted every day thereafter, at 2 AM, to track the shortening and lengthening of the days.
Note: When you select SRise or SnSet, It does not mean that the Start is exactly at the sunrise time, or the End
at exactly at the sunset times. You can select any time window. What it means is that the daily
adjustment is per the change in the sunrise and sunset time amounts. When the days get longer, the
sunrise rise time will be earlier each day and the sunset time will be later.
If you do not have an outdoor light sensor, then the output functions as a time clock with the optional
astronomical adjustment.
If you do have an outdoor light sensor, you can program the following screen:
06
HID
Turn ON <
Turn OFF >
Time Delay
Light
500 W/m2
600 W/m2
20 Min
First you will program the light level below which the lights will be turned ON. Then you will program the level at
which they will be turned off. The final parameter is the Time Delay. If the sun were to appear momentarily, you
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probably don’t want the lights go off and then on again. To avoid this potential cycling problem, you can set a
Time Delay in minutes where the light level must be above the turn off threshold continuously before the lights
will be turned OFF.
Scheduled Light control
06
HID
Light
Select Operational
Mode: Scheduled
If you select Scheduled mode, the following screens have the following format.
06
HID
Start at
End at
Light
12:00A
12:00A
On this screen you can see that you have up to three time periods per day to program an ON and OFF time for
your lights. Just press the Next or Prev keys to navigate to the time entry you want to modify and then use the
+ or – key to adjust the time. The next screen lets you select the days of the week for enabling your lights. This
is on a two week schedule.
06
HID
Light
SMTWTFS SMTWTFS
0111110 0111110
Scheduled Days
A “0” means the lights won’t come on for that entire day, a “1” means they will. Once you’ve pressed the Enter
button, move the cursor with the Next or Prev keys. You toggle between the 0 and the 1 with the + key.
Cyclic Light control
06
HID
Light
Select Operational
Mode: Cyclic
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06
HID
Light
Start at
12:00A
End at
12:00A
On Time 00:20 hh:mm
For the Cyclic light option, this is where you set the time window, that is, the Start and End times during which
the lights can come on this particular light bank – channel 6. You also set the On Time, which is the length of
time the light bank is to come on during its cycle within the time window.
The overall cyclic lighting parameters are set back where you began the programming. From the Main screen,
after you press Enter/Menu, you will select the System Setup option. The fifth option on the list is Cyclic
Lighting.
Daily Light Integral (DLI) control
The purpose of this option is to use artificial light, if necessary, to achieve a daily amount of accumulated light in
the greenhouse zone.
06
HID
Light
Select Operational
Mode: DLI
06
HID
Light
Light Sensor InLight
Threshold:
11.0 kW/m2-Hr
In this second screen you will select the light sensor which you will use to control the amount of accumulated
light. Ideally this would be a light sensor located near the plant level. The second entry is the accumulated light
threshold which is your light target for the day.
06
HID
Light
Day Start
12:00A
Turn On Time 3:00P
Day End
7:00P
In the third screen you will set the day start time when you light accumulator is to begin. Previously, it was reset
to 0. If your threshold is not reached by the Turn On Time (shown as 3 PM in the screen), then the light will
turn on and remain on until either the Light Threshold is reached or the Day End time is reached.
MZone (Micro-Zone) for ON/OFF Equipment
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The iGrow 1800™ can be used to monitor and control up to five (5) independent heating or cooling “MicroZones”. What is a Micro-Zone? A Micro-Zone is a region or compartment within a greenhouse that has a
different temperature setpoint. Typical uses for Micro-Zones would be bench heating, corridor heating, or any
other area in the greenhouse with separate heating or cooling equipment. Any of the iGrow1800’s 12 outputs
can be programmed as an M-Zone. An MZone output is basically an independent thermostat with both a day
and night setting.
Note: MZones only control On/Off type equipments. For control of proportional type see Pzone.
The first option for MZones is setting it to control either a heating device or a cooling one. The next setting is
telling the iGrow1800™ which temperature probe to use. The iGrow 1800™ has five temperature probe sensor
inputs, so it’s important to set the iGrow1600/1800™ to read the correct one for the MZone.
07
BHeat
Mode
Heat
Sensor Temp1
MZone
07
BHeat
MZone
Day 72.0°F Enabled
Start
at
6:00A
Lockout
>= Cool1
Two target temperatures can be set, one for Day and the other Nite. Either can be Enabled or Disabled.
The Day temperature target begins with the Start time. The start can be astronomically adjusted by pressing
the + key when the cursor is positioned over at.
07
BHeat
MZone
Nite 65.0°F Enabled
Start
at
8:00P
Lockout
>= Cool1
The iGrow 1800™ will keep the device on so long as the following two conditions are met:
1. The current cooling/heating stage is less than or equal to the indicated stage, where H6<H5…<N<C1<….C6.
2. The temperature is above/below the target temperature plus the deadband.
Note: The Deadband is set under the “System Setup” menu and then selecting the “Setup Deadbands” option.
The BHeat deadband is one used for MZones.
The Nite target is set exactly the same as the day. If only one temperature setpoint is desired for the 24 hour
period, then you can simply select the Disabled option for the second one.
In the example screen above, iGrow 1800™ output 7 is controlling a Bench Heater. From 6am to 8pm the
heater will turn on if the MZone temperature goes below 72°F. Additionally, it will shut off, or Lockout, if the
main greenhouse enters Cool1-Cool6. This way you’re not trying to heat and cool your greenhouse at the same
time. From 8pm to 6am the setpoint lowers to 65°F and will also Lockout if the greenhouse enters Cool1-Cool6.
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Pump Control
The iGrow offers two types of pump control. Supply pumps are used for hot or cold water temperature control
systems while peristolic pumps are used for nutrient injection systems.
05
Pump2
Pump
Select Pump Type:
Supply
Choose the type of pump you are controlling, Supply or Peristolic
Supply Pump
When you have a mixvalve type heating system, it is often necessary for the controller to manage the system
pump(s). The iGrow 1800™ can control up to 5 Pumps, each one being activated when the mixvalve tied to it
opens beyond the Minimum threshold. To “tie” a pump to a specific mixvalve you must specify, in the
mixvalve’s settings, which pump you want it to control. For more details on this see the Programming / Mix
Valve section of this manual.
05
Pump2
Pump
Pump
2
Supply Mixv’s with
minimum 5% open
In the example screen above, the pump will turn on when the mixvalve that it’s tied to opens at or above 5%.
Peristolic Pump
When you have a nutrient enjection system, it is often necessary for the controller to manage the system
pump(s). The iGrow 1800™ can control up to 5 Pumps, each one being activated when the corresponding
sensor passes the threshold you define below.
05
Pump2
Pump
Probe: 500uS ECT1
ON to: Decrease uS
Probe
Depending on what type of probe you have connected and configured (pH or EC), you can select which one the
pump will be controlled by.
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Note: Configuration of the probe (pH or EC) is done in Input Settings, and this should be done before
programming a Peristolic Pump.
ON to
This pump can be used to either increase nutrient or decrease nutrient per a setpoint you define.
05
Pump2
Pump
Setpoint 0.0uS
Deadband 0.0uS
Setpoint
Setpoint is the ideal value that you want to keep your nutrient at.
Deadband
When the nutrient level falls off the setpoint the pump will be activated. The deadband forces the pump to stay
on for a while past the setpoint. The purpose of deadbands are to keep the pump from constantly turning the
pump on and off again to maintain the setpoint.
05
Pump2
Pump
If Light >
0W/m2
Drive to 0.0 uS
If Light - then Drive to
In order to optimize your growing conditions, the iGrow1600/1800 offers a light override. If a high light level
occurs you can temporarily modify your nutrient setpoint.
05
Pump2
Pump
If Temp1 >
0.0 F
Drive to
0.0 uS
If Temp - then Drive to
Similar to the Light override, you can also override the nutrient setpoint if the greenhouse temperature goes
above the threshold you set.
05
Pump2
Pump
ON TIME
0sec
OFF TIME
5sec
ON/OFF TIME
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When the pump is activated to maintain the desired setpoint it will pulse on and off. It pulses in order to not
overshoot the setpoint.
Vent (Proportional) Programming
Note: This equipment type requires 2 consecutive output channels 1&2, 3&4, etc. The first channel (odd
numbered) must be wired to OPEN the vent, and the other (even numbered) to CLOSE it.
07/08
Top V Vent
N C1 C2 C3 C4 C5 C6
10 20 40 80 40 0 0
Open Time 01m 35s
The vent opening is defined in percentage terms where 0% is vent closed and 99% is where the vent is fully
open. NORM is the normal stage when neither heating nor cooling is usually required. C1 is the lowest stage
of cooling, and C6 is the highest (or maximum) cooling stage. Enter your desired vent opening percentage for
each of the stages.
The Open Time is the time in minutes and seconds that it takes for the vent to go from its full closed to full open
position or vice versa.
Note: to determine the vent open time turn manual toggle switch on, and using a clock or stopwatch, time the
vent as it goes from it’s closed to open position.
07/08
Dir N
WindWd
LeeWd
Top V Vent
Min Max
15 30mph
15 40mph
Wind Overrides
Wind overrides limits are important for safe and effective vent operation. Of course, a weather station (or Link4
anemometer) must already be installed to use this feature. First you have to set Dir, which is the direction that
the vent faces when open. You have eight choices. N, NE, E, SE, S, SW, W, NW.
Next, you will need to set a Min and Max vent opening for the case with the wind blowing into the vent
(Windward) and similarly for the case where the wind is blowing across or over the vent (Leeward). The
program calculates an average wind speed. This is a running average over approximately 5 seconds. Once
the average wind speed exceeds the Min value the vent begins to close. As the wind speed increases and
approaches the Max value, the vent will go to the full close position.
The third vent screen is shown below.
07/08
Top V
Wind Ovr Hold
If Rain MaxOpen
Vent
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5%
Link4 (714) 524-0004
The Wind Ovr Hold parameter is the length of time in minutes that the vent will remain in its override position
once the wind speed is below the minimum threshold. This is to keep short wind gusts from causing the vents
to constantly open & close.
The Rain MaxOpen percent is the maximum vent position once rain is detected.
EXAMPLE:
The wind override has higher priority than rain. Suppose the vent is open 50% and it begins to rain. From the
entry in the above screen, the vent will close down to 5%. Now assume that the wind picks up and exceeds 30
mph with the wind blowing into the vent. The vent will then go to a full close.
The fourth screen below is for insuring that the vent does not open beyond a preset percentage if the outside
temperature is below a user defined threshold.
Low Temperature Override
07/08
Top V Vent
LOW OTEMP OVERRIDE
Vent MaxOpen 0%
If Otemp < 40 ºF
The Vent MaxOpen is the max that the vent will go open if the Otemp is less than the number of degrees that
you enter. In any case, wind and rain overrides will have precedence.
In the fifth and final screen, the vent can be programmed to go to a minimum opening if the outdoor temperature
exceeds a plus or minus value relative to the cool temperature setpoint. This override is anticipatory and is
particularly useful for the open roof vent configuration or the side roll up vents. It is also useful, if one wants to
minimize the vent movements, by just leaving the vent in a fixed position as long as the outside temperature
exceeds some offset from the cool setpoint temperature.
07/08
Top V Vent
Vent Min Open 99%
If Outside Temp >
Cool Setp - 3 ºF
The Vent Min Open is the minimum position for the vent when the Otemp exceeds the CoolSetP plus an
offset temperature. This feature helps improve efficiency by using outside air to cool the greenhouse rather
than fans or Pads. As with the previous screen, wind and rain overrides will have precedence.
EXAMPLE:
Suppose you have an open roof vent and you want to it go to its maximum position when the outside
temperature is 3 degrees below the cool setpoint which during the day is 70 degrees. You will then enter 99 for
the Min Open value and –3 for the offset value. Once the outside temperature exceeds 67 degrees, the roof
vent will, in this example, go to 99% or full open.
Position Sensor Input
07/08
Top V Vent
PositionSensor Input
Position Sensor 1
The iGrow 1800 offers the ability to read true vent position if you’ve wired a vent position sensor to your
iGrow1800. This field sets which Position Sensor to look at (that you have defined in your Menu Mapping).
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07/08
Top V Vent
Set Vent Alarm if
Error > 05% for 00 m
Ignore target > 80%
If the vent position reading is different from where the computer thinks the vent is by more than a certain
percentage that you select, then an alarm is triggered assuming that the reading has persisted for the
length of time that you also must enter. This is an alarm that is particularly useful if a worker were to
leave the vent open from using the manual switches. When the alarm triggers both the high and low
alarm relays are turned on and both the high and low temp LED lights are on.
07/08
Top V Vent
Auto-calibrate Off
The purpose for the Auto-calibrate mode is to establish the open-close run time of the vent between the
open and close positions of the position sensors. When the Auto-calibrate option is switched to ON, this
mode is engaged and the vent will automatically go through the open-close routine and the runtime
between the position sensor positions will be saved in memory.
07/08
Top
N C1 C2 C3
00 00 00 00
Active Cool
V Vent
C4 C5 C6
00 00 00
Ovrides
This is an override screen that becomes engaged when the Active Cooling mode is engaged. For
example, if the greenhouse has vents and a chilled water cooling system, it will be important that the
vents are closed when the chilled water valves are turned on. This screen is where you program the
vent position when the Active Cool mode is engaged.
Curtain Programming
Shade Control
Note: This equipment type requires 2 consecutive channels 1&2, 3&4, etc. The first channel (odd numbered)
must be wired to OPEN the valve, and the other (even numbered) to CLOSE it.
In programming your curtain for shading you will first set a close and open time. It is during this window of time
that you permit or enable the curtain to be controlled for shading purposes.
09/10
H1Top Curt
SHADING
Close __at__ 7:00A
Open
at
6:00P
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You have the option of controlling the close and open times based on a fixed time window or a relative time
window. The latter is relative to the sunrise and sunset times. When the cursor is over the at position and you
press the + or – keys, you will cycle through the three options: SRise, SnSet, and at.
When you set the parameters up for the first time as shown in the above screen, the close and open times will
be adjusted every day thereafter, at 2 AM, to track the shortening and lengthening of the days.
Note: It does not mean that the Close is exactly at neither the sunrise time, nor the Open at exactly at the
sunset times. You can select any time window. What it means is that the daily adjustment is per the
change in the sunrise and sunset time amounts. When the days get longer, the sunrise rise time will be
earlier each day and the sunset time will be later.
In the following screen you have more parameters to set. The first is the MaxClose position. This is important if
you are dependent on ridge vents for cooling. In this case you may not want to close the curtain completely in
order to let hot air escape through the overhead vent. In this event, a typical MaxClose might be 90% or 95%.
09/10
H1Top Curt
SHADE MaxClose 99%
Close Above 800W/m2
or if OutT > 100ºF
If you have a light sensor, you may want the curtain to shade only when the light exceeds a threshold.
Therefore, you have a Close Above light intensity value you can select. Also, if you have an outside
temperature sensor, you may want to close the curtain to the MaxClose position, when the OutT exceeds a
temperature threshold. If you have neither of these sensors, then your shade control is solely dependent upon
the close and open times that you set in the first screen above.
The next screen is the last one for shading control. Here you set the light threshold where the curtain will open
after it was closed. Light levels can vary suddenly and sometimes only for a few minutes, therefore, you will
typically keep this Open Below value in the range of 50 to 100 W/m2 below the Close Above setting on the
previous screen.
09/10
H1Top Curt
SHADE
Open Below
700W/m2
Open Delay 20 min
To further reduce the curtain movement, you can set an Open Delay time. This means that the light level must
be continuously below the Open below threshold for the selected time in minutes before the curtain will open.
Energy Control
Note: This equipment type requires 2 consecutive channels 1&2, 3&4, etc. The first channel (odd numbered)
must be wired to OPEN the valve, and the other (even numbered) to CLOSE it.
Curtains are often used as a thermal blanket during the night. We call this energy control. On the first screen
you set the Close and Open time window. As above, you have the option of adjusting the Close and Open
times for Sunset and Sunrise.
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09/10
H1Top Curt
ENERGY CONTROL 1
Close
at
7:00P
Open
at
8:00A
If you have a light sensor and/or an outside temperature sensor, you can make the energy blanket subject to
certain conditions as shown in the following screen
09/10
H1Top Curt
ENERGY CONTROL 2
Open Above
200W/m2
OR OutT > 75 ºF
You can set a light threshold and an outside temperature threshold above which the curtain will not close.
Either of these two parameters will keep the curtain open.
The final curtain screen has a few more options. The first is that you can select a heating or cooling stage
above which the curtain will be closed to a maximum %. For example, in the above case, the curtain will close
to 95%, if the stage is at or above Cool 5.
09/10
H1Top
MaxClose 95%
ShockProtect
Close Time 01m
Curt
COOL5
40ºF
00s
The next is Shock Protection. In the morning when the curtain is scheduled to open and it is cold above the
curtain, it may not be desirable to open the curtain all at once. This option lets you select an outside
temperature below that the curtain will open in four steps. It will open 5% and then pause for five minutes. It will
do this for four times and then open to 0% without stopping. If the system does not have an outdoor
temperature sensor, this option is not enabled.
The final item is Close Time. This is the time in minutes and seconds it takes for the curtain to go from its full
open position to its full close position. Just as with the vents, this is an important entry since it establishes the
run time for the curtain so that it will go correctly to the close positions that you program.
Mixing Valves
Note: This equipment type requires 2 consecutive channels 1&2, 3&4, 5&6, etc. The first channel (odd
numbered) must be wired to OPEN the valve, and the other (even numbered) to CLOSE it.
01/02 Valve1
MixV
Air Temp1 Min 70.0°F
Wtr Temp1 Max 90.0°F
Open Time 1 m 30 s
Air Temp The Temp1 setting tells the iGrow1800™ which temp probe is being used to measure the hot water supply to
the greenhouse. Since you can have up to 5 temp probes connected to your iGrow1600/1800 be sure to set
this to the correct one. Use the + or – buttons to select the correct probe.
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Wtr TempMin
Min is the minimum water temperature of the supply pipe. If the supply water temperature ever goes below this
value the mixvalve will adjust increase the supply water temperature. Use the + or – buttons to select the
correct temperature.
Max
Max is the Maximum temperature that the supply water should ever become. If the supply water temperature
ever approaches this value, the mixvalve will adjust low the supply water temperature. This is especially
important when PVC pipes are being used. Use the + or – buttons to select the correct temperature.
Open Time
Open Time is the time it takes for the Mixvalve to go from fully opened to fully closed. Measure this time with a
watch, add a few seconds, and then enter it into Open Time field.
01/02 Valve1
MixV
Heating Delay
01 h 15 m 00 s
Use Pump 1
Heat Turn On Delay
Heat Turn On Delay is the estimated time it takes for the heating system to affect the greenhouse temperature.
This is determined by taking a temperature reading with all heating & cooling equipment off and the mix valve
closed, then manually switching the mix valve open. Measure the time it takes for the ambient temperature
within the greenhouse to rise 2 deg.
Use Pump
If you want the iGrow1800 to control a pump associated with the mixvalve system, this is where you select
which pump to control. You must use one Output Channel to control the pump. For more information on how to
setup the pump, see the Pump Control section of this manual.
01/02 Valve1 MixV
Shock Prot:
No
if Temp3 < 105.0°F
limit to 5% open
Shock Protect
Setting Shock Protect to Yes forces the Mixvalve to open slowly, preventing an inrush of cold water into your
boiler system. Shock Protect will work two different ways depending on whether or not you have a return temp
sensor assigned below. Without a Temp sensor the iGrow1600/1800™ will still protect your boiler by adjusting
how quickly the valve opens based on how long it’s been since the valve was opened last. The longer the time,
the slower it will open. If you do assign a temperature probe, then the iGrow1800™ follows the “if Temp(1) is
less than some temp then only open some percentage”.
if Temp(3) < 140°F limit to 5% open
If you have a temperature probe, assigned as Temp1 in the example above, then these are the settings for the
return water supply to the Mixvalve. In this example, if the return water temperature is below 105°F then the
mixvalve will only open 5% until the return temperature reaches the low temperature setpoint of the supply
water temperature.
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01/02 Valve1 MixV
Valve Type Heat
Passive Stage Yes
Tune Range
40.0 F
Valve Type
This field defines the device to be either for Heating or Cooling.
Passive Stage
This only applies if the valve is for cooling. Assuming that the Valve Type is set to Cool, and if the Passive
Stage is set to No, then the cooling valve will be off, when the zone is in the “Passive Stage”., that is, not Active
Cool (AC). If the Passive Stage is set to Yes, the cooling valve is always active.
Tune Range
Tune Range is the allowable temperature range that the Mix Valve PID controller can change the water
temperature setpoint from the setpoint set by the heat/cool demand.
For PID control of the Mix Valve the two following pages must be activated. To activate these pages go to the
Advanced Settings menu and set MixValve Param from Hide to Show. For further information on activating
these screens see page 60.
01/02
Water
Valve1
Temp
P
I
D
MixV
2.00
0.05
0.00
01/02 Valve1
Inside Temp
P
I
Disable No
D
MixV
1.00
0.40
0.40
P, I, and D values
These parameters determine the reaction times of the valve as related to the difference between the target
temperature and the actual temperature.
The P value is a proportional number. The larger the value for P, the faster the valve will move when the
temperature differs from the desired value. The downside to increasing P is that it can result in increased
overshoot.
The I value makes adjustments to the valve position to reduce the temperature overshooting. The larger the
value, the less the temperature will overshoot the target. The downside is that the larger the I value, the slower
the reaction time as the temperature gets close to its target. Also, never adjust I to be zero as it will generate
errors.
The D value looks at the rate of change of the difference between the target and the desired temperature.. The
higher the number, the more the valve will move when the temperature differs from its target. Be very careful
when increasing this number.
Disable
Disable stops the zone feedback loop used by the PID control.
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Note: The iGrow1600/1800’s default settings for PID should be suitable for most any installation, and therefore
should not be modified without a good understanding of PID controls. If you feel a change is necessary
and are not sure how to proceed contact your local distributor, or Link4 directly, for assistance.
Note: You can also disable the zone temperature control loop. This is useful if you want to set a fixed water
temperature. Set the Min and Max water temperature to the same number and disable the zone
temperature loop.
PZone (Micro-Zone) for Proportional Equipment *
PZone (Proportional Device Micro-Zones) are special purpose mixvalves that control Micro-Zones (changes
made). A Micro-Zone is a region or compartment within a greenhouse that has a different temperature setpoint,
and is controlled by a hot water mixvalve heating system. In this system the iGrow1600/1800 measures the
Micro-Zone air temperature, and the hot water supply temperature. The iGrow 1600/1800™ can be used to
monitor and control up to two (2) independent heating PZones.
Note: This equipment type requires 2 consecutive channels 1&2, 3&4, 5&6, etc. The first channel (odd
numbered) must be wired to OPEN the valve, and the other (even numbered) to CLOSE it.
* Note: In some versions PZone may be shown as MZon2
07/08 Valve1 PZone
WtrTemp1 Min 45.0°F
Max 120.0°F
Open Time 00 m 00 s
Settings on the first screen are for the Supply water coming from the MixValve to the Micro-Zone area.
Temp
The Temp1 setting tells the iGrow1800™ which temp probe is being used to measure the hot water supply to
the greenhouse. Since you can have up to 5 temp probes connected to your iGrow1800 be sure to set this to
the correct one. Use the + or – buttons to select the correct probe.
Min
Min is the minimum water temperature of the supply pipe. If the supply water temperature ever goes below this
value the mixvalve will adjust increase the supply water temperature. Use the + or – buttons to select the
correct temperature.
Max
Max is the Maximum temperature that the supply water should ever become. If the supply water temperature
ever approaches this value, the mixvalve will adjust low the supply water temperature. This is especially
important when PVC pipes are being used. Use the + or – buttons to select the correct temperature.
Open Time
Open Time is the time it takes for the Mixvalve to go from fully opened to fully close. Measure this time with a
watch, add a few seconds, and then enter it into Open Time field.
07/08 Valve1 PZone
Heating Delay
00 h 00 m 15 s
Use Pump1
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The second screen are general settings.
Heating Delay
Heating Delay is the estimated time it takes for the heating system to affect the greenhouse temperature. This
is determined by taking a temperature reading with all heating & cooling equipment off and the mix valve closed,
then manually switching the mix valve open. Measure the time it takes for the ambient temperature within the
greenhouse to rise 2 deg.
Use Pump
If you want the iGrow1800 to control a pump associated with the mixvalve system, this is where you select
which pump to use. You must use one Output Channel to control the pump. For more information on how to
setup the pump, see the Pump Control section of this manual.
07/08 Valve1 PZone
MicroZone Air Temp:
Sensor
Temp2
Temp 68.0 to 72.0°F
The third screen is for setting up the Micro-Zone air temp.
Sensor
The Temp(2) setting tells the iGrow1600/1800™ which temp probe is being used to measure the Micro-Zone air
temperature. Since you can have up to 5 temp probes connected to your iGrow1800 be sure to set this to the
correct one. Use + or – to select the correct sensor.
Temp
Temp refers to the setpoint temperatures for the Micro-Zone. Use + or – to set each value.
07/08 Valve1 PZone
Shock Prot:
No
if Temp3 < 105.0°F
limit to 5% open
The fourth screen is settings for shock protection in your boiler system.
Shock Protect
Setting Shock Protect to Yes forces the Mixvalve to open slowly, preventing an inrush of cold water into your
boiler system. Shock Protect will work two different ways depending on whether or not you have a return temp
sensor assigned below. Without a Temp sensor the iGrow1600/1800™ will still protect your boiler by adjusting
how quickly the valve opens based on how long it’s been since the valve was opened last. The longer the time,
the slower it will open. If you do assign a temperature probe, then the iGrow1800™ follows the “if Temp(1) is
less than some temp then only open some percentage”.
if Temp(3) < 140°F limit to 5% open
If you have a temperature probe, assigned as Temp1 in the example above, then these are the settings for the
return water supply to the Mixvalve. In this example, if the return water temperature is below 105°F then the
mixvalve will only open 5% until the return temperature reaches the low temperature setpoint of the supply
water temperature.
For PID control of the PZone the two following pages must be activated. To activate these pages go to the
System Setup screen and then the Advanced Settings menu and set MixValve Param from Hide to Show.
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01/02 Valve1 PZone
Water Temp
P 2.00
I 0.05
D 0.00
01/02 Valve1 PZone
Inside Temp
P 1.00
I 0.40
Disable No
D 0.40
P, I, and D values
These parameters determine the reaction times of the valve as related to the difference between the target
temperature and the actual temperature.
The P value is a proportional number. The larger the value for P, the faster the valve will move when the
temperature differs from the desired value. The downside to increasing P is that it can result in increased
overshoot.
The I value makes adjustments to the valve position to reduce the temperature overshooting. The larger the
value, the less the temperature will overshoot the target. The downside is that the larger the I value, the slower
the reaction time as the temperature gets close to its target. Also, never adjust I to be zero as it will generate
errors.
The D value looks at the rate of change of the difference between the target and the desired temperature.. The
higher the number, the more the valve will move when the temperature differs from its target. Be very careful
when increasing this number.
Note: The iGrow1600/1800’s default settings for PID should be suitable for most any installation, and therefore
should not be modified without a good understanding of PID controls. If you feel a change is necessary and are
not sure how to proceed contact your local distributor, or Link4 directly, for assistance.
07/08 Valve1 PZone
Valve Type Heat
Passive Stage NO
Tune Range
40.0 F
Valve Type
This field defines the device to be either for Heating or Cooling
Passive Stage
This only applies if the valve is for cooling. Assuming that the Valve Type is set to Cool, and if the Passive
Stage is set to No, then the cooling valve will be off, when the zone is in the “Passive Stage”., that is, not Active
Cool (AC). If the Passive Stage is set to Yes, the cooling valve is always active.
Tune Range
Tune Range is the allowable temperature range that the Mix Valve PID controller can change the water
temperature setpoint from the setpoint set by the heat/cool demand.
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Generic PID Controller (G PID)
The iGrow 1800 supports two types of Generic PID controllers: Timed and Pulsed. The timed version
requires two output channels and the first channel must be on an odd numbered output. The pulsed
version requires only one output and can be set on any channel.
09/10
G PID
Type
Timed
Move Time 00 m 00 s
09/10
G PID
P 1.50 I 1.50 D 0.00
Sensor: Generic1
Setpt 0.1000 in Hg
09/10
G PID
Override Sn Disabled
09/10
Delay
01 h 00 m
No Pump
G PID
00 s
09
G PID
Type
Pulse
Period
00 m 00 s
VOut Variable Voltage/Current Output
VOut devices will only appear as an equipment type if you have purchased the optional iMOD expansion
module
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Note: If you have installed the iMOD expansion module but don’t see VOut as an equipment option, you must
Enable “Expansion Settings” before it will appear as available equipment. You will have to go back to the
first programming screen and scroll down to the Expansion Settings option.
Variable Current Outputs
For outputs that you have configured in Expansion Settings as Variable Current devices, the following
screens appear.
15
VFan1
VOut
Current varies with
Ht Dem
Ht Dem
This field determines whether the equipment connected to this output is for heating or cooling. Ht Dem is for
heating and Cl Dem is for cooling.
15
VFan1
VOut
Ht Dem mAmps
Max
0
20.00
Min
0
20.00
Max
Max is the heat demand percentage that you want the maximum output level to occur at. The value to the right
of Max sets the current output that occurs at the max percentage.
Min
Min is the heat demand percentage that you want the minimum output level to occur at. The value to the right
of Min sets the current output that occurs at the min percentage.
15
VFan1
Offset Cal
Gain
Cal
VOut
0.00
1.00
Offset Cal
Gain Cal
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Dehumidify/Humidify
System Setup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
DH1 DH2 DHLT H
Fan1
1
1
0 0
Heat -0
1 -Vent1 5 15 00 00
DH
Max On 05m 00s
Min Off 10m 00s
Heat Boost 2.5ºF
DHLT < 35.0ºF OutT
When you select the Dehumidify/Humidify option it takes you to a screen that lets you program the equipment
you want to use in each of the four humidity override states. See second figure above. The four states are:
•
•
•
•
DeHumidity Stage 1 (DH1)
DeHumidity Stage 2 (DH2)
DeHumidity Low Temperature (DHLT)
Humidify (H)
DH1 is engaged when the zone’s humidity reading is immediately above the ‘High’ humidity setpoint. In the
example, Fan1 will go on and Vent1 will go to 5%.
DH2 is engaged when the zone’s humidity reading is above the setpoint by 5%
DHLT is the dehumidification state that is engaged when the outside temperature is below a user set value on
the next screen (in the example, when the outside temperature is less than 35.0ºF).
H or humidify stage is engaged when zone’s humidity is below the ‘Low’ Humidity Setpoint
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Note: For On/Off equipment, a “1” indicates that the equipment is to be turned On in the override state. A “0”
would indicate that it is to go Off. The - - indicate that the equipment is not to be subject to the override.
For proportional devices, a percentage open for vents and a percentage closed for curtains would be
entered for the override.
For vents, the percentage open is a “minimum” value. For example, if the vent is open to 30% because of
cooling, then when the dehumidification state is active, the vent will stay at 30%. However, if the vent were
closed, and the DH1 state becomes active, the vent will go to 5% according to our example.
Pressing the “next” button takes you to the next screen. When in a dehumidify override state you have the
option of cycling the dehumidification state. In the example, a Max On for 5 minutes and a Min Off for 10
minutes is programmed. This means that if the humidity is above the target, the dehumidify state will cycle on
for 5 minutes and off for ten. If during the On time, the humidity drops below the target, the dehumidification
state will end and the equipment will return to normal temperature control.
The Heat Boost is another means of reducing the humidity. You can automatically increase the setpoint by the
amount entered. This adjustment is subject to the On/Off cycling. If you want to turn off the dehum cycling,
then just set the Min Off to 0.
The final entry is the outside temperature below which the Low temp DeHumidity Low Temperature (DHLT)
stage is enabled. From the example, when the outside temperature is less than 35 °F, the exhaust fan will be
turned off and Vent1 will go to a minimum of 5 % open.
Stage Overrides
System Setup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
Stage Override 1 Off
Force to Stage ----At 8:00A to 8:15A
Occurs One Time Only
Stage overrides are useful for testing purposes, where you can force the iGrow1600/1800 into any of the
heating or cooling stages. They are also useful for fumigation, where there are spraying cycles the require
everything to be closed and then exhaust cycle where air exchange takes place.
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It is possible to override one, to four, of the setpoint settings by forcing the zone into one of the cooling, heating
or normal stages for a selected time period. There are four possible stage override programs. When you go to
the stage override screen, the first highlighted segment is the Stage Override #. Use of the + or - keys selects
one of the 4 setpoints you wish to override. The next field is used to enable the override. This is done by
toggling the field from Off to On.
Select Stage Override Number
When Stage Override 1 is highlighted press the + or – buttons to select which of the 4 Stage Overrides you
want to set.
Force to Stage --------With the use of the + or -, you can select the stage that you want to force the zone into.
Time Start and Stop
Enter the times of day you want the overrides condition to begin and end.
One Time Only or Daily
Choices for this field are Daily or One Time Only. If “One Time Only” is selected, once the override is
completed, it will not occur again without being reset to On. If Daily is selected, the override will occur every day
during the time window.
Equipment Overrides
System Setup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
01
Override Off
Vent1
Force On
At 8:00A to 8:15A
Occurs One Time Only
This programming feature allows you to manually override your greenhouse equipment for specified periods of
time, either once or daily.
Select the Channel
Pressing the + or - to find the Channel you wish to override.
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Force
With the use of the + or -, you can select whether you want to force the digital equipment either On or Off and
the proportional equipment to a particular position.
Start and End Times
Now use the + or – buttons to enter the times to Start and Stop the override.
One Time Only or Daily
Enter the times of day you want the overrides condition to begin and end. Choices for this field are Daily or One
Time Only. If “One Time Only” is selected, once the override is completed, it will not occur again without being
reset to On. If Daily is selected, the override will occur every day during the time window.
Smart Cool Settings
System Setup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Smart Cool Settings
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
Smart Cool: Disable
Enter a number from
1 to 10: 6
(10 Most Aggressive)
What is Smart Cool? It is an innovative program that uses the outside temperature and light data to assist in
making intelligent cool staging decisions for the most efficient control of your greenhouse. The 1-10 Smart Cool
setting is a thermal efficiency rating that your iGrow1800 uses to determine how quickly your greenhouse heats
up and cools down. Knowing these parameters, the iGrow1800 can predict how aggressively it should cool
your greenhouse.
Enable/Disable
Pressing the + key when the upper right hand field is highlighted, toggles you between the “Enable” and
“Disable” Smart Cool option. If you toggle to the “Enable” option your greenhouse will now function under
“Smart Cool”.
Smart Cool Setting (1 to 10)
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Your next step is to set the thermal efficiency of your greenhouse. The aggressiveness that you select will need
to match the type of greenhouse that you are controlling. For example, the temperature can change very
rapidly in a small glass greenhouse. However, the reverse might be true for a large poly house with a shading
system. To get it right may take some experimenting or “tuning”. When you look at the historical data, you can
see what kind of changes you need to make to get a better response. So select a number from 1 to 10 with 1
being the least aggressive and 10 the most aggressive use of “Smart Cool”. The default number is 6 which
should be a good starting point. Use the + or – buttons to adjust this number.
Important! Smart cool can be used whether or not you have an outside light and temperature sensor.
However, it will function most efficiently, if you have both these sensors.
Smart Cool Operating Examples:
Case I: No outside light or temperature sensors:
For this case, Smart Cool operates as follows:
When the inside temperature rises above your cool setpoint temperature, your system will immediately go to
Cool1 or higher. If your greenhouse remains in this stage for a certain length of time without dropping the
temperature, it will automatically go to the next higher cooling state and reset the timer. This process will
continue until the greenhouse temperature is at or below the cool setpoint. Once this condition is satisfied, no
further stage change is made until one of the following three conditions occurs.
Condition I: Zone temperature goes above the cool setpoint – in this case the cool stage is increased by one
and the above process is resumed.
Condition II: Zone temperature drops below the midpoint of the cool and heat setpoints. As soon as the
temperature drops below the midpoint, the cooling state is reduced by one. Hopefully, this will raise the zone
temperature above the midpoint. If after a certain time, this does not happen, the cool stage will again be
lowered by one. This down-staging continues until the temperature rises to the “cool deadband”.
Condition III: Zone’s temperature drops to within 0.2 degrees above the heat setpoint. If this occurs, the system
will immediately revert to the Normal stage. Of course, if the temperature continues to drop, the system will go
into its heating mode.
Least aggressive to most aggressive:
The aggressiveness setting (1 to 10) has to do with how fast the system will increase its cooling stages
(upstage) or lower its cooling stages (downstage). If the greenhouse is one where the temperature inside can
change rapidly, then it is important to be more aggressive on the upstaging and less aggressive on the
downstaging. For example, if 6 is selected, the upstaging timer is set to 4 minutes and the downstaging timer is
6 minutes. If 10 is selected, the upstage timer is 1 minute and the downstage timer is 9 minutes. If 1 is
selected, the upstage timer is 10 minutes and the downstage timer is 1 minute.
Case II: Light and/or outside temperature sensors:
With a light and/or outside temperature sensor, the system uses a proprietary algorithm to modify the upstage
and downstage times as a function of the sensor readings. Assume an aggressiveness number of 6 is
selected. As noted above, the upstage timer is 4 minutes and the downstage timer is 6 minutes if the outside
temperature is close to the inside setpoint temperature and the light level is low. As the light level increases, the
upstage time will be shortened and the downstage time will be increased. This change will occur gradually.
Similarly, as the outside temperature goes above the inside setpoint temperature, the upstage time is reduced
and the downstage time is increased.
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Setpoint Alarms
System Setup
Setpoint/TimePeriod
Advanced Setpoints
Program Equipment
Dehumidify/Humidify
Stage Overrides
Equipment Overrides
Setpoint Alarms
Auxiliary Controls
Expansion Settings
Heat Demand
Cool Demand
Temp Setp. Alarms
10.0°F above for 99m
10.0°F below for 99m
(99m = disabled)
Set Temperature
The Setpoint Alarm screen lets you set a high temperature and a low temperature alarm relative to the Set
Point. For example, if your Set Point temperature is 70 degrees, and you want the alarm to trigger 10 degrees
above this value you will enter the 10 as shown above.
Time Value
The Time Value that must be met in order to trigger the alarm. A value of 99 disables the alarm. If the value is
zero, then the alarm will occur immediately when the temp setting is met.
Note: It is highly recommended you use the optional Link4 Sensaphone to call your user preset phone numbers
in case of an alarm being triggered.
Note: If both alarm lights go on, this is an indicator that the temperature sensor for inside temperature has
malfunctioned.
Auxiliary Controls
Aux 1 set Channel 3
Temp2
<
59°F
For 00:30 mm:ss,
Hold time 10 mm
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Auxiliary Controls (also known as Aux Control) are a cross between an Equipment Control and an Alarm
Control. Aux Controls allows you to control any Equipment or Alarm Output based on a specified environmental
condition. Aux Controls are often used as a flexible Alarm control, as they can turn on an Output if an alarm
type condition occurs. Another way to look at Aux Controls is as a Conditional Equipment Control. Meaning, if
some specific condition occurs in your greenhouse, then activate certain Equipment.
Aux (1)
You can have up to 8 Aux Controls. Use the + or – buttons to set which Aux Control you want to setup.
Channel (3)
You can assign Aux Control to control any Output Channel (1-12 and either or both Alarm Output(s)).
Control can operate as an override to an equipment such as:
Aux
Example 1
Channel 1 is a single channel device (ON/OFF, CO2, Light, etc) - if channel 1 passes some threshold then
activate channel 5
Example 2
Channel 1 is set as a two channel, proportional, device (Vent, Mixvalve, Curtain) – if channel 1 goes above 50%
then de-activate channel 7
Select the conditional Control
To select the conditions, adjust the sensor input, greater than or less than, and the value under which the
condition will trigger at. Use the + or – buttons to choose adjust these values.
Select Condition Time
The specified condition must occur for the specified time in order to activate the Output Channel.
Hold Time
Once the condition is no longer met, the Hold Time will keep the channel active for the specified amount of time.
In the example screen above, if the Temp2 (Temp Probe 2) measures a temperature below 59°F for 30sec
then Output Channel 3 will turn on. Channel 3 will then remain active for 10 minutes or until the temperature
rises above 59°F. This is useful to prevent cycling of equipment.
Expansion Settings
Expansion Settings
Enabled
CH15
Voltage
CH16
Voltage
Expansion Settings
AnalogIn1
Voltage
AnalogIn2
Voltage
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With the iGrow1800 you have the ability to add the iMOD (Multi Output Device) Expansion Module. The iMOD
module adds 2 relay outputs to your iGorw1800 controller (Channels 13 and 14) plus two variable voltage
outputs, or variable current outputs (Channels 15 and 16).
Enabled
The Enable/Disabled field simply switches communications with the expansion iMOD expansion board on or off.
CH15 Voltage/Current
This setting configures Output Channel 15 to output either 0 to 10V, or 4 to 20mA
CH16 Voltage/Current
This setting configures Output Channel 16 to output either 0 to 10V, or 4 to 20mA
Heat Demand
One of the iGrow1600/1800’s advanced features is Heat Demand, predictive control. This feature helps you
optimize the efficiency of your greenhouse while reducing equipment usage by changing more gradually rather
than by waiting until conditions have already changed.
Heating Demand
Design Delta 45.0 F
Max OLight 1200W/m2
Max Wind
80mph
Design Delta
The Design Delta is maximum difference between the outside temperature and heating setpoint that the heating
system can maintain.
Max OLight
Max OLight is the maximum Outdoor light level typically experienced by the greenhouse. This value is used to
calculate heat demand based on light. 1200W/m2 is a good approximation for North America.
Max Wind
Max Wind is the maximum wind speed experienced by the greenhouse. This is used to calculate heat demand
based on wind speed.
Heating Demand
OLight Factor 0%
Wind Factor
0%
OLight Factor
OLight Factor is a percentage of the outdoor light influence on determining heat demand. 0% represents no
influence, while 100% represents maximum influence.
Wind Factor
Wind Factor is a percentage of wind’s influence on determining heat demand. 0% represents no
influence, while 100% represents maximum influence
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Cool Demand
Cooling Demand
Design Delta 45.0 F
Max OLight 1200W/m2
OLight Factor
0%
Design Delta
The Design Delta is maximum difference between the outside temperature and cooling setpoint that the cooling
system can maintain.
Max OLight
Max OLight is the maximum outdoor light level typically experienced by the greenhouse. This value is used to
calculate cool demand based on light. 1200W/m2 is a good approximation for North America.
OLight Factor
OLight Factor is a percentage of the outdoor light’s influence on determining cool demand. 0% represents no
influence, while 100% represents maximum influence.
Cooling Demand
Active Cool Disabled
Stage Ovr
Disabled
Stage NORM
Active Cool
When Active Cool is Disabled, the controller will operate only in stage based cooling (6 stages of cooling).
However when Active Cool is Enabled, fixed stage based control is turned off, and chilled water mixing valves
will begin modulating to whatever percentages the demand requires above the Active threshold.
Stage Override (Stage Ovr)
When Active Cooling is Enabled, and Stage Ovr is Enabled, you can force all the stage based equipment to a
specified stage so they don’t fight each other. You can select the stage for eliminating this contention in the last
entry.
Cooling Demand
Disabled
Demand
Active >
75%
Passive <
25%
Active
When the Cool Demand rises above this percentage, the greenhouse will enter Active Cooling
Passive
When Cool Demand fall below this percentage, the greenhouse will enter passive cooling.
Note - When the iGrow first starts, if cool demand is less than the active cool setting, the greenhouse will be in
passive cooling.
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cccccccccccccccccccccccccccccc
Appendix
iGrow 1800™
User Manual Supplement
Advanced Auxiliary Controls
User’s Manual
October 2015 Edition - Version 1.0
Table of Contents
What are Advance Auxiliary Controls? .......................................................................................... 108
Getting Started with Auxiliary Controls ........................................................................................ 109
Typical Conditional Statement......................................................................................................... 112
Example of Conditional Statement Priorities .............................................................................. 116
2 OPERATOR CONDITIONAL STATEMENT..................................................................................... 119
Using Variables in Control Statements ......................................................................................... 122
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What are Advance Auxiliary Controls?
Link4’s iGrow 1800 is an industry leading advance climate control system. Out of the box it has
many built-in equipment logic to optimize your ability to easily control and shape the environment as
desired to optimize plant growth, yield, and quality while minimize inputs such as labor, energy
consumption, water, nutrient, etc.
These built-in control logics were a result of years of research and field experience, as well as a
vast amount of grower feedback. It is our recommendation that the user utilize these logic and change
the provided parameters to adapt the system to the specific grower’s and plants’ needs. However, we
do realize that there are situations that require a separate set of control logic that is unique to the
growth facility. In order to accommodate these needs, Link4 has provided a set of control logic that are
referred to as Advance Auxiliary Controls. We will sometimes refer to them in this manual as AACs.
These controls logic has the following characteristics:
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•
•
•
•
They are conditional “If_____ then ______” type controls. In other words, they
will be executed upon meeting a user defined condition.
They act as override to the built-in controls. For example, Link4 has provided a
set of built-in controls for a typical Ventilation system. However, the user can
use the AACs to override the Vents expected behaviors in specific situations.
They are not the highest priority in the system. The equipment protection
control logic (from the weather station) has a higher priority than the AACs. For
example, if there are high wind condition, the Vents above will close, regardless
of the AACs’ commands.
There is a maximum of 128 control statements in each iGrow 1800 controller.
They will be executed in “top-down” fashion. The higher number statements will
have priority over lower number statements.
The control statements can only access sensors and other control parameters
from its own zone, and can only control outputs in its own zone. In other words,
the user can’t read a sensor from Zone 5, compare to another sensor reading
from Zone 6, and turn on an output in Zone 7. They would all need to be in the
same zone.
Note: Due to the unique flexible nature of these control logic, we only recommend the
applications of the AACs to the most advance users only. Due to our limited resource, Link4 will
not be able to assist you with the debugging of these mini “control programs”. For those of you
who are on an annual maintenance contract, there are special assistance available. Please
contact our support department for specific details.
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Getting Started with Auxiliary Controls
From the Zone Summary Screen, choose the zone which you would like to apply your auxiliary control
to. Locate the Zone Settings control box in the lower left. Select “Aux Controls”.
This will bring up the Advanced Aux Controls window. On the iGrow 1800, there will always be a Zone
Master control unit in a zone. Sometimes, there could other “expansion” units (up to 3).
On the tab named “Zone Master Aux Controls” Click Add to create a new conditional control statement.
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A sample control statement will appear. This example aux control will not do anything funtionally. The
control statement is in the form of a conditional statement (if x condition then result y). Select Edit to
customize the logic on this statement to suit your control needs.
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The following screen will appear to prompt you to enter your control logic. The control statement
follows a specific format.
OPERAND: The objects which the auxiliary control statement will use to evaluate the condition are
referred to as operands. There could be 1, 2, or 3 operands in a statement. Almost all inputs and outputs
can be operands. Examples are Inside Temperature, Vent Positions, Soil Moisture Level, Time of Day,
etc.
OPERATOR: Operators are conditions in which you use to evaluate operands from each other.
Examples of operands are AND, OR, NOT, >, =, etc. The result of the operator after evaluating the
operands would be either TRUE or FALSE. If TRUE, then the condition would be considered met (see
more below).
CONDITION HOLD TIME: This is the time in which the condition has to be met (TRUE) for the entire
duration before the statement can be executed.
ACTION: If the condition was successful met (i.e. It was TRUE for the entire duration of the CONDITION
HOLD TIME), then the ACTION would take place. The action is usually be turning something on or off
(set). Sometimes it can be changing a software variables. Refer to the Variable section for more
information on variables.
TARGET EQUIPMENT: The TARGET EQUIPMENT is the equipment (or other parameters) that the
ACTION would be performed on. For example, the TARGET EQUIPMENT could be an Exhaust Fan.
Note that the TARGET EQUIPMENT could be a parameter or a variable as well.
TARGET VALUE: The TARGET VALUE is the value of the ACTION that the condition statement will
perform on the TARGET EQUIPMENT. Example values are ON, OFF, 45%, etc. An example, SET HAF
to ON, where ON is the TARGET VALUE.
ACTION HOLD TIME: The action hold time is the time that the ACTION will continue to be performed
even though the conditional statement is no longer met (FALSE).
USER COMMENT: Useful comments for user to describe the intended use of the conditional
statement.
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Typical Conditional Statement
It is best to illustrate the AACs with an example. Let’s say, we want to open the Curtain to 25% if
the temperature inside the climate is higher than 87.5F for 2 minutes. Also, once the temperature cools
down below 87.5F, we still want the Curtain to stay at 25% for 10 minutes before going back to where it
needs to be according to the built-in logic.
You might want to try this on your own before consulting the images below.
First, select the operands, by clicking on the None button. The operands are grouped by functions. For
inside temperature, go to the Sensor group. Then select Inside Temperature.
Next select the “greater” operator ( > )
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As the greater operator is selected, the system automatically generated a second operand place holder.
Click on that.
Again, as previously, the operands are shown in groups. In this case, look for a special group of
operands that has numbers or values. Select “Number/Value” and enter in 87.5. Note the degree
Farenheit is inserted automatically since the AAC knows that you are comparing with the Inside
Temperature reading.
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Part of the requirement was a requirement that the condition (Inside Temp > 87.5F) must be met for at
least 2 minutes continuously. This is referred to as the Condition Hold Time. Enter in 2m as shown
below.
Once the condition has been met, in this case Inside Temp > 87.5F for 2 minutes, then an action will take
place. The action is usually setting something. This is the default already (set). Leave the default and
proceed to the target equipment. Click on the Variable 1 button.
As with the operands, the Target Equipment are grouped by functions. In this case, select Equipment
and select Curt. This will set the Curtain as the target of this statement.
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Once the Curtain has been selected as the target. Click on the Target Value button (0%) and enter the
25% value as the value to drive the curtain to once the condition has been met fully.
The requirement also prompted us to use the Action Hold Time. This is amount of time that the system
should “hold” the action (in this case keep the curtain at 25%) eventhough the condition (Inside Temp >
87.5F) is no longer met. Click on the hold time box and enter in 10m for 10 minutes.
Next enter in a short comment describing the logic for this statement. While this step seems very
obvious, we highly suggest that you do this for all statements. Imagine the case where there are 128
steps, it will be essential in understanding the overall logic of the AACs.
Click Save to save the statement.
You could add more statements. However, it is NOT saved until you click the Update button.
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Example of Conditional Statement Priorities
As stated previously, the AACs are executed in a top down fashion. This means the system will
evaluate the statement number 1 first, then 2, then 3, etc. until it comes to the last statement provided.
Maximum number is 128. The statement number is shown at the beginning next to each statement.
In this example here, we will show how two statements can be applied to the same piece of
equipment, thus making priority crucial.
In the example above, we created a statement to open the Curtain if it is too warm inside the
growth space. Now, we will add statement #2 to close the Curtain completely if the light level is
excessive. We will use the same procedure as above to create statement #2:
Similarly to how we did it before
In this case here, the light override will have priority over the temperature. In other words, if the Inside
Temperature is too warm the Curtain is open to 27%. However, if the light on the plants is too intense
(> 1000 W/m2), the Curtain will close regardless of what the Inside Temperature is.
However, what if you don’t want this? What if you want the Curtain to open up when it’s too warm
inside, regardless of the light level?
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You can change the priority of the Inside Temperature statement by moving it to #2 the Light statement
to #1. This is done by clicking on the upward arrow on the right of the statement #2:
Then the new ACCs will look like this:
Click Update to save.
This will cause the Curtain open up when it’s too warm inside, regardless of light level.
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2 OPERATOR CONDITIONAL STATEMENT
One of important concept to keep in mind is that each conditional statement there is
typically one operator. In the example above, the operator was the “greater” ( > ) operator.
The ACCs structure also allows for statements with NO operator, or TWO operators. 3 or more
operators are not possible.
The No operator case is actually a shorthand version of the > 0 statement. For example,
a digital input is either 0 or 1. So you could write
When Digital 1 is > 0 ……
or just write
When Digital 1 ……..
In other words, just omit the > 0 portion of the statement.
The 2 operator condition is fairly common in controls. They are usually in the format of
greater than _____ AND less than ______. Here is an example:
Let’s say you have a Vent, that you want to open to 25%, but only when it’s not too dry
(>30% RH) nor too humid (<90% RH) outside. Conditions must be met for 10min to be valid.
Continuing from above examples, and add a new control statement:
As usual, add an operand, however this time chose the number operand first.
Then choose the less than operator
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Then choose the Outside Humidity operand (all the way to the bottom of the list).
As you can see, a place holder for the second operator is automatically presented. Click on it and select
the less than operator.
Now add in the 90% for the third operand
Then the 10 minute Condition Hold Time
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Then set the Target Equipment and Value
If done properly, you should get the conditional statement #3 as shown below:
Click Update to save.
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Using Variables in Control Statements
As mentioned above, the ACCs are limited to a maximum to 2 operators and 3 operands.
However, there are times where more complex statements need to be constructed. In order to
accomplished this, variables are introduced into the AACs.
Most statements have ACTIONs that are used to turn equipment on, off, or drive them
to a certain position. However, the ACTIONs can be stored in a variable so that it can be used
again in another control statement.
Let’s illustrate this with an example:
First, let’s say you have a Pump equipment that drains the water out of a pipe. You also have a
water sensor that detects whether or not there is water in the pipe. This water sensor is a
digital sensor (0 = no water, 1 = water) and is connected to Digital Input #1. You also have a
water temperature (connected to Analog input 1), and if there is water in the pipe AND the
water temperature is > 70F, you want to set an alarm.
Again, it’s best to try to do this on your own first, then consult the following figures.
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First, let’s say the pump is on output #12:
First create a variable and call it Main Pipe Water Sensor. Go to the Zone Master Variable tab in the
AACs. Name the variable appropriately, with comments.
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Before the variable name can be used, you need to click Update. Exit the AAC panel and come back in
again.
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Now use the familiar process to create a new conditional statement #4:
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Now, in this case, you set the TARGET PARAMETER to a variable and choose the name Main Pipe Water
Sensor as shown.
Then set the value to 1, in the event that Digital Input 1 = ON for 1 minute:
Now that we have created statement to set the variable, we can start using it in other statements:
Add statement #5, select the variable as the operand:
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Now, you can go straight to setting the Action and the Target Parameter and Value, to turn the return
pump on when there’s water in the pipe.
Add in the hold time and comment, and save statement #5
It’s worth noting that statement #5 is an example of Zero Operator Statement. We did not enter any
operator in the process.
Now we use the variable to turn on some HAF (horizontal airflow fans):
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Setting the alarm based on a combination of water present and water temperature is a bit more
complex. First, detect if the water is present:
Then choose the AND operator
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Now build the temperature conditional statement:
Now set the action to turn the alarms on:
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Set hold time, comments, and save
The completed statements should look like below:
Click Update to save.
Now, as example of debugging, there is actually a problem with the above construction. Can you find it?
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Examine statement #8 below.
We will move it to the 5th position:
Now, when there’s no water, the variable will be set to 0. Without #5, this variable goes to 1 to indicate
water present, but still stay as 1 eventhough the sensor detects that the water is gone.
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