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CS-IO1600DI User Manual
4.2 Modbus Register Instruction
This control card supports communication of various function codes, please
refer to the below.
Instruction code Meaning
02 Read discrete input [DI]
03 Read parameter register (06 for writing parameter)
Register address table:
Register name PLC Register
address Explaination
Discrete input
Input 1
Read switch
function code 02
0000H The 1st DI
Input 2 0001H The 2nd DI
Input 3 0002H The 3rd DI
Input 4 0003H The 4th DI
Input 5 0004H The 5th DI
Input 6 0005H The 6th DI
Input 7 0006H The 7th DI
Input 8 0007H The 8th DI
Input 9 0008H The 9th DI
Input 10 0009H The 10th DI
Input 11 000AH The 11th DI
Input 12 000BH The 12th DI
Input 13 000CH The 13th DI
Input 14 000DH The 14th DI
Input 15 000EH The 15th DI
Input 16 000FH The 16th DI
Parameters Configuration
Communication
baud rate
Read register
function code 03
Write register
function code 06 03E8H See the below corresponding
table of baud rate values, the
default value is 0, and supports
0-5. This register determines the
communication baud rate of
RS232 and RS485 at the same
time.
Spare 03E9H Spare, user cannot write any
value.
Offset address 03EAH Communication address =
software a DIP switch
address
Woring Mode 03EBH Working mode storage