Rievtech PR-6DC-DA-R - Chapter 8 Modbus Function Code and Register Addresses; Xlogic Modbus Function Code

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 Y1 Solenoid valve
 S1 Pressure switch
S2(make contact) Bobber switch(water level)
S3—S4(break contact) Bobber switch(water level)
Function block diagram:
Chapter 8 Modbus function code and Register addresses
8.1 xLogic modbus function code
The following table contains some communication orders supported by xLogic.
Order
code(Hex)
Function description
Length of
message(one frame
order can deal with)
Remarks
01
Read one group coil status （ 00000 ～
0XXXX）
--
Read Coil Status (Output
relay)
02
Fetch one group data of the status of
switch input
（10000～1XXXX）
--
Read input Status (input
relay)
03
Read data of multi-holding register
（40000～4XXXX）
--
Read Holding Registers
(Output register)
05
Force the switch status of single coil
（00000～0XXXX）
1
Force Single Coil
06
Pre-set the data of single register
（40000～4XXXX）
80
Set single output register
15
Force multi-coils on/off data
many