Agrowtek VX12i Instruction Manual Download Page 13

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Serial Speed & Format

The default serial data format for the LX2 ModLINK interface is: 

19,200 baud, 8-N-1

.

Alternate speeds and formats between 9,600 - 115,200 baud may be configured with the free AgrowLINK PC 

utility using a LX1 USB AgrowLINK and the cross-over adapter supplied with the LX2 ModLINK. 

MODBUS Manual

See MODBUS manual for more information.

LX2 ModLINK™

LX1 USB AgrowLINK™

GrowNET™

Cross-Over

7 - 24 Vdc

USB

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 = off.

Register Types

0x01 Read Coils

0x03 Read Multiple Registers

0x05 Write Single Coil

0x06 Write Single Register

0x15 Write Multiple Coils

A request to use a function that is not available will return an illegal function error (0x01).

Supported Commands

Summary of Contents for VX12i

Page 1: ...tivation Controllers 11 Connection to USB AgrowLINK 12 Specifications Input Power 1A 15Vdc Max Switching Current 1A per point 1A combined Max Switching Voltage 24Vdc Outputs 8 Sourcing FETS Output Sta...

Page 2: ...sed for discrete or analog type sensors A 5Vdc 500mA power supply is includ ed on board for powering analog sensors or providing a signaling voltage for discrete or dry contact sen sors Typical Discre...

Page 3: ...omponent Locations O8 O7 GND O6 O4 O2 IN4 IN2 5V O5 GND O3 GND O1 GND IN3 GND IN1 GND GND 2 1 3 4 1 I O Screw Terminal Block Make connections to analog sensor inputs and transistor outputs 2 Input Jum...

Page 4: ...installation only Enclosures are not water proof 3 Do not place sensor in direct sunlight Installation Instructions DANGER Electrocution Hazard Disconnected all power sources before servicing or wirin...

Page 5: ...ons 1 2 EM T K nock outs 12 24 V DC P ower J ack GrowNET P ort RS 4 8 5 M O DB U S RT U Maximum 1A power supply current Input power protection fuse of 1A required to prevent damage to the unit from ov...

Page 6: ...l terminals marked GND are common 2 5V VX12i only A 5V DC 500mA power supply is provided for powering discrete and analog 5V sensors that connect to the 0 5V dc input terminals 3 Inputs VX12i only The...

Page 7: ...rrigation valves can be connected directly to the DC outputs when the unit is operated with the included 15 Vdc power supply Up to eight valves can be connected and up to four valves can be operated s...

Page 8: ...als are accepted or for advice on analog filter construction 2 Relays Contactors DC powered relays contactors and SSR s may be driven directly by the outputs Each output is protected for flyback and s...

Page 9: ...are simple typically mechanical sensors that manipulate a physical switch dry contact to close a circuit Passive sensors do not have any electronics on board and simply pass through the signal voltag...

Page 10: ...or 0 005mA Each input has a default range in Voltage mode of 0 5Vdc or if set with a jumper to a Current mode a 0 20mA range Voltage Mode Standard mode for 0 5Vdc analog sensors or discrete type sens...

Page 11: ...re in electrical connectors Loctite LB 8423 Dupont Molykote 4 5 CRC 05105 Di Electric Grease Super Lube 91016 Silicone Dielectric Grease Other Silicone or Lithium based insulating grease NOTICE GrowNE...

Page 12: ...3 4 5 6 7 8 AgrowNET Link Port TM STATUS INDICATORS MODBUS RTU RS 485 Use the LX2 ModLINK to connect MODBUS devices to the GrowNET port RJ 4 5 C AB L E 7 24 Vdc Technology to Help You Grow AGROWtEK U...

Page 13: ...Cross Over 7 24 Vdc USB Cross Over 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...

Page 14: ...g Input Value Integer Input 1 Signed Int 16 bit signed R 40101 Input 2 40102 Input 3 40103 Input 4 40104 Analog Input Value Floating Point Input 1 Floating Point 32 bit float R 40201 Input 2 40203 Inp...

Page 15: ...ess or merchantability for a particular purpose and is limited to the Warranty Period In no event or circumstance shall Agrowtek Inc be liable to any third party or the claimant for damages in excess...

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