Agrowtek RX1i Instruction Manual - Page 5

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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.
LX1 USB AgrowLINK™
GrowNET™
USB
See MODBUS manual for more information.
MODBUS Manual

Supported Commands

0x01 Read Coils
0x03 Read Multiple Registers
0x05 Write Single Coil
0x06 Write Single Register
A request to use a function that is not available will return an illegal function exception.

Register Types

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 being on and 0 being off.

MODBUS Register Map

Parameter
Device Address
Serial#
DOM
HW Version
FW Version
Timeout (seconds)
Relay 1 Count
Relay Coil 1
A request to read or write a register that is not available will return an illegal address exception.
5
LX2 ModLINK™
Cross-Over
7 - 24 Vdc
Description
Slave Address
Serial Number
Date of Manufacture
Hardware Version
Firmware Version
Turn off relay if no comms
Operation Cycle Count
Relay Coil
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Type
Scale
Value, 1-247
8 bit
ASCII
8 Char
ASCII
8 Char
ASCII
8 Char
ASCII
8 Char
Value
16 bit
Value
32 bit
Coil
1 bit
Access
Address
R/W
40001
R
40004
R
40008
R
40012
R
40016
R/W
41001
R
49001
R/W
1