Easy Electronics xLogic Micro PLC - Chapter 8 Modbus Function Code and Register Addresses

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Chapter8ModbusfunctioncodeandRegisteraddresses
8.1xLogicmodbusfunctioncode
ThefollowingtablecontainssomecommunicationorderssupportedbyxLogic.
Order
code(Hex)
Functiondescription
Length of
message(oneframe
ordercandealwith)
Remarks
01
Readonegroupcoilstatus （ 00000 ～
0XXXX）
-- ReadCoil Status (Output
relay)
02 Fetchonegroupdataofthestatusof
switchinput
（10000～1XXXX）
-- Read input Status (input
relay)
03 Read data of multi-holding register
（40000～4XXXX）
-- ReadHoldingRegisters
(Outputregister)
05 Forcetheswitchstatusofsinglecoil
（00000～0XXXX）
1 ForceSingleCoil
06 Pre-setthedataofsingleregister
（40000～4XXXX）
80 Setsingleoutputregister
15 Forcemulti-coilson/offdata
（00000～0XXXX）
many
16 Write multi-holding registers data
（40000～4XXXX）