Page 1: Table Of Contents
Relays & I/O Modules (RX, RD, DX, VX series) MODBUS TCP/IP Holding Registers Integer Register Scaling Discrete Registers Control Function Registers Dosing Recipe Registers © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™ © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 2: Grownet™ Modbus Devices
GrowNET™ MODBUS Devices 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.) Climate Sensors Outlet Relays Irrigation Valve Controller LX Link Modules Hydroponics Sensors Wet &...
Page 3: Modbus
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™...
Page 4: Modbus Rtu
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-buffered bridge be- tween Agrowtek’s high-speed, full duplex GrowNET™ devices connected with RJ45 cables, to a terminal block for integration with PLC systems.
Page 5: Grownet™ Network With Hx8 Hubs
GrowNET™ Network with HX8 Hubs 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 buffered for excellent signal performance in long distance and distributed applications.
Page 6: Lx2 Modlink™ Configuration
Device Address = 254 (address must be set to 254 to configure the LX2.) Configure the serial settings according to your master control device, then press the “Set” button. “OK” reply confirms the settings have been successfully configured on the LX2. © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 7: Device Address
(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 LX1 USB AgrowLINK™...
Page 8 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. © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 9: 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. © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 10: Hydroponics Sesnors (Sxh, Phx)
16 bit, unsigned 41001 Pump 1 49001 Pump 2 49003 Pump 3 49005 Accumulated Run Time (seconds) Pump 4 49007 Unsigned Int 32 bit, unsigned Pump 5 49009 Pump 6 49011 © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 11: Relays & I/O Modules (Rx, Rd, Dx, Vx Series)
Output 2 49003 Output 3 49005 Output 4 49007 Output Closure Count, Unsigned Int 32 bit, unsigned Discrete Output 5 49009 Output 6 49011 Output 7 49013 Output 8 49015 © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 12: Modbus Tcp/Ip
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.
Page 13: Holding Registers
0 - 1000 W/m2 0 - 10,000 ppm Leaf IR Temperature x100 -2000 - 6000 (-20 - 60°C) / -400 - 14000 (-4 - 140°F) x100 0 - 10 kPa © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 14 0 - 2000 (0 - 20.00 mg/L) Flow 0 - 125 gpm Input Modules (DXI8) Type Integer Scale Range Voltage 0 - 5000 mV Current x100 0 - 2000 (0 - 20 mA) © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 15: Discrete Registers
Output Override OFF Force-Off 5 Force-Off 6 Force-Off 7 Force-Off 8 Force-On 1 Force-On 2 Force-On 3 Force-On 4 Output Override ON Force-On 5 Force-On 6 Force-On 7 Force-On 8 © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 16: Control Function Registers
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 © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 17 0 = Seconds 1 = Minutes 2 = Hours Preset On Timer Value 1 - 65535 (Seconds) Units Timer Units 0 = Seconds 1 = Minutes 2 = Hours © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 18 Position limit during rain 0 - 100 % Wind Position Position limit during high wind 0 - 100 % Low Temp Position Position limit during low temp 0 - 100 % © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 19 2 = Fill Mode Operation Mode 0 = Fill 1 = Drain 2 = Flush Timeout Fill/Drain Time-out 0 - 65535 (seconds) Timeout Units Seconds/Minutes 0 = Seconds 1 = Minutes © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 20 1 = Analog Mode Action Mode (analog) 0 = Lower 1 = Raise Set Point Analog set point 0 - 6553.5 (x10) Deadband Analog comparator deadband 0 - 6553.5 (x10) © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...
Page 21: Dosing Recipe Registers
Nutrient Name Name of Nutrient Part ASCII Characters 2 Chars/Register Name Length Recipe Name Length 0 - 30 (60 characters max) Recipe Name Name of Recipe ASCII Characters 2 Chars/Register © Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™...