Agrowtek GrowNET User manual

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Contents
GrowNET™ MODBUS Devices 2
MODBUS 3
Connection Types 3
Supported Commands 3
Register Types 3
MODBUS RTU 4
LX1 USB AgrowLINK 4
LX2 ModLINK™ 4
GrowNET™ Network with HX8 Hubs 5
LX2 ModLINK™ Conguration 6
Device Address 7
Set Address via Modbus 7
Set Address via LX1 USB Link 7
Serial (RTU) Registers 9
All Devices 9
Environment Sensors (SXC, SXE, SXW) 9
Hydroponics Sesnors (SXH, PHX) 10
Dosing Pumps (ADi) 10
Relays & I/O Modules (RX, RD, DX, VX series) 11
MODBUS TCP/IP 12
Holding Registers 13
Integer Register Scaling 13
Discrete Registers 15
Control Function Registers 16
Dosing Recipe Registers 21
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AGROWtEK INSTRUCTION MANUAL
MODBUS

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GrowNET™ MODBUS Devices
Irrigation Valve Controller
Motor Controllers
Wet & Dry Contacts
Outlet Relays
DIN Rail I/O
Climate Sensors
Weather Sensors
Irrigation Panels
Dosing Pumps
Hydroponics Sensors
LX Link Modules
GrowNET™ Hub
MODBUS RTU
All of Agrowtek’s GrowNET™ peripheral devices support serial MODBUS RTU directly to your PLC or host
device via RS-422 (LX2) or USB (LX1.)
MODBUS TCP
Agrowtek’s GCX control system allow advanced access to GrowNET™ devices and control settings through
MODBUS TCP via the standard CAT5/WiFi network connection.

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Data registers are 16 bits wide with addresses using the standard MODICON protocol.
Floating point values use the standard IEEE 32-bit format occupying two contiguous 16 bit registers.
ASCII values are stored with two characters (bytes) per register in hexadecimal format.
Coil registers are single bit values which control and indicate the status of a relay; 1 = on, 0 = o.
Register Types
0x01 Read Coils
0x03 Read Multiple Registers
0x05 Write Single Coil
0x06 Write Single Register
Supported Commands
Sensors Relays Pumps
Read 16bit Signed Read Coil Status Read Pump Speed
Read 32bit Float Write Coil Status Write Pump Speed
Write Calibration Read Close Count Read Pump Hours
Read Manufacturing Info
Agrowtek’s intelligent sensors, relays and peristaltic pumps are designed to communicate via the standard
industrial MODBUS protocol for PLC, PC, embedded and OEM control applications.
MODBUS
MODBUS data can be accessed using a PLC directly from GrowNET™ devices using a serial“RTU”connection.
Multiple devices (up to 247) can be connected via RTU using Agrowtek’s HX8 communication hubs to a LX
link module. LX1 (USB) or LX2 (RS-485) modules interface the GrowNET™ device network with a PLC or PC.
MODBUS data can also be accessed via local area networks or remotely through the internet using MODBUS
TCP when the application involves a GrowControl™ GCX control system to which GrowNET™ devices are con-
nected.
Connection Types

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LX1 USB AgrowLINK
The LX1 USB AgrowLINK may be used for USB/UART communications to devices, or for rmware updates,
calibration, addressing and testing/manual operation using free PC software.
Standard drivers automatically install in Windows for the LX1 USB AgrowLINK. MODBUS commands may be
sent over USB from a terminal or software application.
USB Connection Requirements:
115,200 baud, 8-N-1
LX2 ModLINK™
LX2 ModLINK™ connects Agrowtek’s intelligent sensors, peristaltic dosing pumps,
and control relays equipped with a GrowNET™ RJ45 port to a standard RS-485 serial
bus for use with the MODBUS RTU protocol. ModLINK is an MCU-buered bridge be-
tween Agrowtek’s high-speed, full duplex GrowNET™ devices connected with RJ45
cables, to a terminal block for integration with PLC systems. 15kV ESD rated RS485
terminals with 70V fault protection to protect against wiring errors and short circuits.
LX2 may be congured for 19,200 -115,200 baud rates and any serial data format usung the LX1 USB Link
and free PC application.
LX1
USBGrowNET™ RJ45
RJ45/CAT5
7 - 24 Vdc
3.3/5Vdc Serial Bus Compatible.
Include required bus terminating resistors per EIA standard.
TX/RX+
TX/RX-
PLC
RS-485
MODBUS RTU
Agrowtek’s intelligent sensors, relays and peristaltic pumps can communicate directly using the standard
industrial MODBUS RTU serial protocol for PLC and OEM control applications. Each device may be assigned
an address of 1-247. Address 254 is a universal broadcast address. Addresses may be sent to the address
register by MODBUS command, or congured using the LX1 USB link with PC software.

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HX8 GrowNET hubs connect multiple devices to a MODBUS network using only one LX2 ModLINK.
HX8 hubs supply power to all 8 ports from one power supply to operate sensors and relays from the
GrowNET (Ethernet) cable connection for fast, easy installation (pumps require their own power supply.)
HX8 Hubs are fully buered for excellent signal performance in long distance and distributed applications.
Daisy chain hubs as needed for the number of ports required.
Uses standard RJ45 Ethernet cable for all connections.
GrowNET™ Network with HX8 Hubs
LX2
Power is provided to GrowNET™ devices from the HX8 hub’s power supply allowing for
single-cable installation for most devices (pumps require their own power supply.)

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The default serial data format for the LX2 ModLINK interface is: 19,200 baud, 8-N-1.
Alternate speeds and formats may be congured with the LX1 USB AgrowLINK and the cross-over adapter
supplied with the LX2 ModLINK.
Open the ModLINK utility and set:
Device Address = 254 (address must be set to 254 to congure the LX2.)
Congure the serial settings according to your master control device, then press the“Set” button.
“OK”reply conrms the settings have been successfully congured on the LX2.
Download ModLINK Utility
LX2 ModLINK™LX1 USB AgrowLINK™
GrowNET™
Cross-Over
7 - 24 Vdc
USB
LX2 ModLINK™ Conguration

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The LX1 USB AgrowLINK may be used to
congure the LX2 ModLINK and set device
(slave) addresss of devices.
Download ModLINK Utility
1. Connect the GrowNET™ device to the USB AgrowLINK with a standard Ethernet cable.
2. Connect the USB AgrowLINK to the PC and allow the drivers to install automatically.
If the drivers do not install automatically download and install them Download Driver.
The device address (slave ID) is stored in each device at address register 1 (40001) and can be modied in
several ways:
1. Send a modbus command using the broadcast address (254) to modify the value in register 1.
2. Use the LX1 USB link connected to a device with the AgrowLINK software utility to set the address.
Device address 254 is a universal broadcast address which can be used to set an address on a device which
has an unknown address or has a 0 address. The device to be congured must be the only device on the bus
when using the broadcast address or conicts may occur.
To set a device address of “5”, send the value“5”to register# 1 (40001) using address 254.
Set Address via Modbus
Set Address via LX1 USB Link
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AGROWtEK
U.S.A.
MADEIN
© 2016 Agrowtek Inc.
www.agrowtek.com
GrowControl
DigiClimate Canopy Sensor
TM
TEMP RH LIGHT CO2
ifequipped
KEEP
FAN
FILTER
CLEAN
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AGROWtEK
U.S.A.
MADE IN www.agrowtek.com
GrowNET
Device/Hub
TM
USB
AgrowLINKTM
LX1 USB to GrowNET™ Bridge
TX
RX
Ethernet
Cable USB Cable
Sensor PC
LX1 USB AgrowLINK™
Device Address

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6. Set the device address to the desired value by selecting the “Addr.” drop down then press“Set.”
8. The device is ready to be deployed on a MODBUS network. Set the Device Address in the Connection box
back to“254” to connect to the next device.
7. Verify the new address by selecting the new address in the Connection box then press“Read Status.”
5. Check the device connection by clicking the “Read Status”button; you should get a reply with last internal
status update from the device.
3. The COM port should be automatically selected when the program is opened if the drivers are installed.
Select the COM Port drop-down to refresh and scan for a USB AgrowLINK.
4. Ensure device address “254” (universal broadcast address) is selected in the Connection box.

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Environment Sensors (SXC, SXE, SXW)
Parameter Description Range Type Access Address
Toggle Units Toggle sensor units 1 - 4 16 bit, unsigned W 41002
Sensor Reading,
Integer
Temperature -2000 - 6000 (-20 - 60°C) x100
16 bit, signed R
40101
Humidity 0 - 1000 (0 - 100%) x10 40102
Light 0 - 1000 W/m2 40103
CO2 0 - 10,000ppm 40104
PLIR Leaf IR Temperature -2000 - 6000 (-20 - 60°C) x100 40105
Sensor Reading,
Float
Temperature -20.00- 60.00 °C
32 bit, oating pt R
40201
Humidity 0 - 100.0 % 40203
Light 0 - 1000 W/m2 40205
CO2 0 - 10,000ppm 40207
PLIR Leaf IR Temperature -2000 - 6000 (-20 - 60°C) x100 40209
Calibration Input,
Oset (Zero)
Temperature
See integer ranges above. 16 bit, signed W
41101
Humidity 41102
Light 41103
CO2 41104
Calibration Input,
Analog Output
Temperature
-255 - 255 (bits) 16 bit, signed W
41301
Humidity 41302
Light 41303
CO2 41304
A request to read or write a register that is not available will return an illegal address error (0x02).
Serial (RTU) Registers
Sensors with alternate units may toggle the units using the“toggle units” register. To toggle the units, send
the sensor channel number to to the toggle register. This register is write-only.
For example: to toggle between °F and °C, send a “1” to register 1002.
All Devices
Parameter Description Range Type Access Address
Address Device Slave Address 1 - 247 8 bit R/W 40001
Serial# Device Serial Number ASCII 8 char R 40004
DOM Date of Manufacture ASCII 8 char R 40008
HW Version Hardware Version ASCII 8 char R 40012
FW Version Firmware Version ASCII 8 char R 40016
Device Model Product Model Number ASCII 8 char R 40020
RTU registers are accessed directly on the device via a serial connection through a LX1 or LX2 link module.

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Hydroponics Sesnors (SXH, PHX)
Parameter Description Range Type Access Address
Toggle Units Toggle sensor units 1 - 4 16 bit, unsigned W 41002
Sensor Reading,
Integer
Temperature -2000 - 6000 (-20 - 60°C)
16 bit, signed R
40101
pH 0 - 1400 (0 - 14.00pH) 40102
Conductivity 0 - 5000 microSiemens
0 - 2500 ppm
40103
O.R.P. / D.O. -1000 - +1000 mV
0 - 4000 (0 - 40.00 mg/L)
40104
Flow 0 - 30gpm (0-150lpm) 40104
Sensor Reading,
Float
Temperature -20.00- 60.00 °C
32 bit, oating pt R
40201
pH 0 - 14.00pH 40203
Conductivity 0 - 5000 microSiemens
0 - 2500 ppm
40205
O.R.P. / D.O. -1000 - +1000 mV
0 - 4000 (0 - 40.00 mg/L)
40207
Flow 0 - 30gpm (0-150lpm) 40207
Calibration Input,
Zero
Temperature
See integer ranges above. 16 bit, signed W
41101
pH 41102
Conductivity 41103
O.R.P. / D.O. 41104
Calibration Input,
Span Point
Temperature
See integer ranges above. 16 bit, signed W
41201
pH 41202
Conductivity 41203
O.R.P. / D.O. 41204
Calibration Input,
Analog Output
Temperature
-255 - 255 (bits) 16 bit, signed W
41301
pH 41302
Conductivity 41303
O.R.P. / D.O. 41304
Dosing Pumps (ADi)
Parameter Function Range Type Access Address
Motor Speed (%)
Pump 1
0 - 100
16 bit, unsigned
R/W
40101
Pump 2 16 bit, unsigned 40102
Pump 3 16 bit, unsigned 40103
Pump 4 16 bit, unsigned 40104
Pump 5 16 bit, unsigned 40105
Pump 6 16 bit, unsigned 40106
Timeout (seconds) Turn o pumps if no communication 0 - 32767 16 bit, unsigned R/W 41001
Accumulated Run Time
(seconds)
Pump 1
Unsigned Int 32 bit, unsigned R
49001
Pump 2 49003
Pump 3 49005
Pump 4 49007
Pump 5 49009
Pump 6 49011

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Relays & I/O Modules (RX, RD, DX, VX series)
Parameter Description Range Type Access Address
Analog Input Value,
Integer
Input 1
Signed Int 16 bit, signed R
40101
Input 2 40102
Input 3 40103
Input 4 40104
Input 5 40105
Input 6 40106
Input 7 40107
Input 8 40108
Analog Input Value,
Floating Point
Input 1
Floating Point 32 bit, oat R
40201
Input 2 40203
Input 3 40205
Input 4 40207
Input 5 40209
Input 6 40211
Input 7 40213
Input 8 40215
PWM Output
(Duty Cycle %)
0-10V Output
(0-10,000mV)
Output 1
0-100
or
0-10,000
16 bit, signed R/W
40301
Output 2 40302
Output 3 40303
Output 4 40304
Output 5 40305
Output 6 40306
Timeout (seconds) Turn o outputs if no communication 0 - 32767 16 bit, unsigned R/W 41001
Output Closure Count,
Discrete
Output 1
Unsigned Int 32 bit, unsigned R
49001
Output 2 49003
Output 3 49005
Output 4 49007
Output 5 49009
Output 6 49011
Output 7 49013
Output 8 49015
Parameter Access Address
Output Coil 1 R/W 1
Output Coil 2 R/W 2
Output Coil 3 R/W 3
Output Coil 4 R/W 4
Output Coil 5 R/W 5
Output Coil 6 R/W 6
Output Coil 7 R/W 7
Output Coil 8 R/W 8

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MODBUS registers are available to read and write data to peripheral
devices on the GCX system. The TCP Command server must be enabled
and may be operated on port 502 or 4040.
Each device on the GCX system can be accessed individually by the
device address assigned to each device on the GrowNET™ bus.
Device Address
GrowNET™ devices on the GCX system are assigned a device address
from 1 to 100 on each GrowNET™ bus. GCX+ systems suport two
GrowNET™ busses for a total of 200 devices.
MODBUS addresses on bus 0 = Device address on GCX system.
MODBUS addresses on bus 1 = Device address on GCX system + 100.
Supported Commands
0x01 Read Output Coils
0x02 Read Input Coils
0x03 Read Holding Registers
0x05 Force Single Output Coil
0x06 Write Single Holding Register
Standard Error Responses
-Unsupported MODBUS commands will return an ‘illegal function’error (0x01.)
-Unsupported registers or request lengths will return an ‘illegal data address’error (0x02.)
-Writing invalid data to a register will return an‘illegal data value’ error (0x03.)
-Writing data to regsiters that require diagnostic mode will return a‘slave device busy’error (0x06.)
Register Types
All registers are 16 bits wide with addresses using the standard MODICON protocol. Floating point values
use the standard IEEE 32-bit format occupying two contiguous 16 bit registers. ASCII values (text strings) are
stored with two characters (bytes) per register in hexadecimal format with trailing 0x00 for empty bytes.
Coil Registers
Devices with discrete coil registers (relays) may be accessed beginning with the rst output (1) up to the
number of outputs on the device (8 max. typical.) Forcing a coil register will set the output to O or On
mode, disabling the Auto mode.
Input Registers
Devices with discrete input registers (input modules) may be accessed beginning with input 1 (register
10001) up to the number of inputs on the device (8 maximum typical.) Input modules feature both analog
and discrete registers for each input. Discrete inputs register “true”when the analog voltage is above 20% of
the input range.
MODBUS TCP/IP

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Holding Registers
Parameter Description Values Type Access Address
Name (max 100 char) Device Name ASCII Characters 2 chars/register R 40001
Integer Register
Integer Value 1
Sensor Reading
Analog Input Value
PWM Output (% Duty)
Pump Speed (%)
16 bit, signed R
40101
Integer Value 2 40102
Integer Value 3 40103
Integer Value 4 40104
Integer Value 5 40105
Integer Value 6 40106
Integer Value 7 40107
Integer Value 8 40108
Float Register
Floating Point Value 1
32 bit, oating pt R
40201
Floating Point Value 2 40203
Floating Point Value 3 40205
Floating Point Value 4 40207
Floating Point Value 5 40208
Floating Point Value 6 40211
Floating Point Value 7 40213
Floating Point Value 8 40215
Holding registers contain data and from sensors and devices in 16 bit or 32 bit“word” data structures.
Sensor values are available in integer or oating point formats depending on the register requested (see
map.) Some integer formatted values are scaled by factors of 10’s to maintain decimal precision and require
division to calculate the nal value.
Integer Register Scaling
Sensor # Type Integer Scale Range
1 Temperature x100 -2000 - 6000 (-20 - 60°C) / -400 - 14000 (-4 - 140°F)
2 Humidity x10 0 - 1000 (0 - 100%)
3 Light x1 0 - 1000 W/m2
4CO2 x1 0 - 10,000 ppm
5Leaf IR Temperature x100 -2000 - 6000 (-20 - 60°C) / -400 - 14000 (-4 - 140°F)
6 VPD x100 0 - 10 kPa
Environment Sensors (SXC, SXE)

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Hydroponics Sensors (SXH, GXH, PHX)
Sensor # Type Integer Scale Range
1 Temperature x100 -2000 - 6000 (-20 - 60°C)
2 pH x100 0 - 1400 (0 - 14.00pH)
3 Conductivity x1 0 - 2500 ppm
4 O.R.P. x1 -1000 - +1000 mV
5D.O. x100 0 - 2000 (0 - 20.00 mg/L)
6Flow x10 0 - 125 gpm
Sensor # Type Integer Scale Range
1 Temperature x100 -2000 - 6000 (-20 - 60°C) / -400 - 14000 (-4 - 140°F)
2 Humidity x10 0 - 1000 (0 - 100%)
3 Light x1 0 - 1000 W/m2
4CO2 x1 0 - 10,000 ppm
5 Speed x1 0 - 125mph
6 Direction x1 0 - 359°
7 Barometric Pressure NOT CURRENTLY AVAILABLE
8 Rain 0 - 1
Weather Sensors (SXW)
Input Modules (DXI8)
Type Integer Scale Range
Voltage x1 0 - 5000 mV
Current x100 0 - 2000 (0 - 20 mA)

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Discrete Registers
Parameter Description Type Access Address
Output Status Register
Output 1
bit R
1
Output 2 2
Output 3 3
Output 4 4
Output 5 5
Output 6 6
Output 7 7
Output 8 8
Output Override OFF
Force-O 1
bit R/W
101
Force-O 2 102
Force-O 3 103
Force-O 4 104
Force-O 5 105
Force-O 6 106
Force-O 7 107
Force-O 8 108
Output Override ON
Force-On 1
bit R/W
201
Force-On 2 202
Force-On 3 203
Force-On 4 204
Force-On 5 205
Force-On 6 206
Force-On 7 207
Force-On 8 208
Discrete registers provide details on the I/O status of on/o type of outputs, and allow manual overrides of
outputs. Output status registers are read-only; manual control is accomplished via the override registers.
Override Registers
A “force-on”and “force-o” register is available for each output. To force an output on or o, set the respec-
tive register to“true.”To return an output to “auto”mode, set both overrides to “false”.
Note: Setting one override to true will automatically set the opposite override to false.

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Control Function Registers
Control function values can be accessed if a MODBUS register is set for the specic control function setting.
This allows read and write of control parameters using MODBUS registers.
Device Address
Access to control functions is performed through device address 201.
Register Index
Function registers are accessed by setting a primary register which subsequent registers are indexed from.
The user or integrator must set an index register for each function setting to access the settings.
Accessing Registers
The settings are accessed by sending read-register requsts to device address 201, at the index or specic
register number requested according to the oset tables on the following pages. Multiple registers can be
requested up to the Modbus limit.
For example; requesting the registers from the graphic above for the “Function Status”and “Function Value”:
Device Address = 201
Start Register = 1000
Number of Registers = 2
1. Enable Modbus Enable access to the function registers with MODBUS.
2. Register Index Number to use as the rst (index) register for accessing the settings.
3. Register Preview Displays the range of registers used for this setting according to the index.
1 2 3

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All Functions
Index Parameter Description Values Type Access
+0 Status, Parent Function Status
<1 = False, 1 = True
-1 = Error
0 = Idle
1 = Active
Int R
+1 Value, Parent Analog Value of Function 0 - 100, etc. Int R
+2 Status, Setting Setting Status
<1 = False, 1 = True
-1 = Error
0 = Idle
1 = Active
Int R
+3 Reserved
+4 Enable Mode Setting Enable Mode 0 = Disabled
1 = Enabled
2 = If(Output On)
3 = If(Output O)
4 = If(Function True)
5 = If(Function False)
Int R/W
+5 Start Hour Scheduler Start Time 0 - 23 Int R/W
+6 Start Minute 0 - 59 Int R/W
+7 End Hour Scheduler End Time 0 - 23 Int R/W
+8 End Minute 0 - 59 Int R/W
+9 First Day# Scheduler Day Range 1 - 9999 Int R/W
+10 Last Day# 1 - 9999 Int R/W
+11 Output Type Discrete or Analog 0 = No Output
1 = Discrete
2 = Analog
Int R/W
+12 Analog Output Value to send to output 0 - 100% Int R/W
Count Timer
Index Parameter Description Values Type Access
+13 Mode Timer Operation Mode 0 = Delay-On
1 = Delay-O
2. = One-Shot On
3. = One-Shot O
Int R/W
+14 Preset Timer Value 1 - 65535 Int R/W
+15 Units Timer Units 0 = Seconds
1 = Minutes
2 = Hours
Int R/W
Cycle Timer
Index Parameter Description Values Type Access
+13 Preset O Timer Value 1 - 65535 (Seconds) Int R/W
+14 Units Timer Units 0 = Seconds
1 = Minutes
2 = Hours
Int R/W
+15 Preset On Timer Value 1 - 65535 (Seconds) Int R/W
+16 Units Timer Units 0 = Seconds
1 = Minutes
2 = Hours
Int R/W

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Thermostat/Humidistat/Photostat
Index Parameter Description Values Type Access
+13 Mode Operation Mode 0 = Cool / DeHumidify / High Lt
1 = Heat / Humidify / Low Lt
Int R/W
+14 Set Point Sensor Setting - 40F to 160F (-20C to 60C) (x10)
0 - 100% (x10)
0 - 1000 W/m2
Int R/W
+15 Dead Band Dierence from Set Point 0 - 999 Int R/W
CO2
Index Parameter Description Values Type Access
+13 Mode Operation Mode 0 = Exhaust
1 = Inject
2 = Inject with Dark Disabled
Int R/W
+14 Set Point Sensor Setting 0 - 5000 Int R/W
+15 Dead Band Dierence from Set Point 0 - 1000 Int R/W
Lighting
Index Parameter Description Values Type Access
+13 Current Intensity Current Dimming Output 0 - 100 % Int R
+14 Target Intensity Dimming Set Point 0 - 100 % Int R/W
+15 Ramp Rate Dimming Change Rate 0 - 100 % per Minute Int R/W
+16 Solar Dimming Enable Solar Dimming 0 = Disabled, 1 = Enabled Int R/W
+17 Light Set Point Set Point for Dimming W/m2 Int R/W
+18 High Temp Dimm. Enable High Temperature Dimm 0 = Disabled, 1 = Enabled Int R/W
+19 Max Temperature Dim/Shut Down Temperature °F/°C Int R/W
Position Control
Index Parameter Description Values Type Access
+13 Position Target Output Target of Setting 0 - 100% Int R
+14 Active Stage Current Vent Stage 0 - 8 Int R
+15 Mode Operation Mode 0 = Shade
1 = Ventilation
Int R/W
+16 Minimum Position Minimum % open limit 0 - 100 % Int R/W
+17 Maximum Position Maximum % open limit 0 - 100 % Int R/W
+18 Static Position Static position setting 0 - 100 % Int R/W
+19 Solar Position Position for Solar setting 0 - 100 % Int R/W
+20 Solar Sensor Sensor value for solar setting W/m2 Int R/W
+21 Stage First Position Position for First Vent Stage 0 - 100 % Int R/W
+22 Stage Final Position Position for Final Vent Stage 0 - 100 % Int R/W
+23 Stage Tempeature Temperature for Stage 1 °F/°C Int R/W
+24 Number of Stages Position stages in ventilation 1 - 8 Int R/W
+25 Stage Separation Temperature between stages °F/°C Int R/W
+26 Rain Position Position limit during rain 0 - 100 % Int R/W
+27 Wind Position Position limit during high wind 0 - 100 % Int R/W
+28 Low Temp Position Position limit during low temp 0 - 100 % Int R/W

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Irrigation
Index Parameter Description Values Type Access
+13 Current Mode Active Irrigation Mode 0 = Pump Delay
1 = Feeding
2 = Draining
Int R
+14 Current Stage Active Irrigation Stage# 0 - 65535 Int R
+15 Cycle Count Completed Irrigation Cycles 0 - 65535 Int R
+16 Repeats Number of Repeats Set 0 - 9999 Int R/W
+17 Repeat Delay Delay between Repeats 0 - 65535 (seconds) Int R/W
+18 Output Delay Delay for Pump/Valve Output 0 - 65535 (seconds) Int R/W
+19 Enable Drain Valve 0 = Disabled, 1 = Enabled Int R/W
+20 Drain Time Time Delay for Drain Valve 0 - 65535 (seconds) Int R/W
+21 Enable Moisture Use Moisture Sensor Triggering 0 = Disabled, 1 = Enabled Int R/W
+22 Moisture Level Minimum Moisture Level 0 - 100% Int R/W
+23 Stage Count Number of Irrigation Stages 0 - 65535 (seconds) Int R
+24 + n Stage Time Time Duration of Stage n 0 - 65535 (seconds) Int R/W
Tank Level
Index Parameter Description Values Type Access
+13 Is Triggered Drain/Fill is Active 0 = Inactive, 1 = Active Int R
+14 Active Stage Current Operation Stage 0 = O
1 = Drain
2 = Fill
Int R
+15 Mode Operation Mode 0 = Fill
1 = Drain
2 = Flush
Int R/W
+16 Timeout Fill/Drain Time-out 0 - 65535 (seconds) Int R/W
+17 Timeout Units Seconds/Minutes 0 = Seconds
1 = Minutes
Int R/W

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20
Output Link
Index Parameter Description Values Type Access
No additional Modbus registers available.
Input
Index Parameter Description Values Type Access
+13 Input Type Discrete / Analog 0 = Discrete
1 = Analog
Int R/W
+14 Mode Action Mode (analog) 0 = Lower
1 = Raise
Int R/W
+15 Set Point Analog set point 0 - 6553.5 (x10) Int R/W
+16 Deadband Analog comparator deadband 0 - 6553.5 (x10) Int R/W
Nutrient Dosing
Index Parameter Description Values Type Access
+13 Current Group Dosing Group (A, B, C...) 0 - 26 Int R
+14 Mode Operation Mode 0 = Recirculating
1 = Inline (future)
Int R/W
+15 Nutrient Lock Stop pH/ORP when dosing 0 = Disabled, 1 = Enabled Int R/W
+16 pH Up Enable Enable pH Up Dosing 0 = Disabled, 1 = Enabled Int R/W
+17 pH Up Flowrate ml/Min dosing rate 0.1 - 999 (x10) Int R/W
+18 pH Down Enable Enable pH Down Dosing 0 = Disabled, 1 = Enabled Int R/W
+19 pH Down Flowrate ml/Min dosing rate 0.1 - 999 (x10) Int R/W
+20 ORP Enable Enable ORP Dosing 0 = Disabled, 1 = Enabled Int R/W
+21 ORP Flowrate ml/Min dosing rate 0.1 - 999 (x10) Int R/W
+22 Name Length Length of Recipe Name 0 - 80 Int R
+23 + n Recipe Name Name of Recipe ASCII Characters 2 Chars/Register R
Note: Read registers +0 to +22, then using the name length returned, request registers starting at +23 with quantity
equal to the name length to retrieve the name in character format.