Parameter channel | Schneider Electric LXM32M instruction

3 Basics	LXM32M

3.3.4.3 Parameter channel

The master can request a parameter value from the slave or change a parameter value via the parameter channel. Each parameter can be uniquely addressed via the index and subindex.

Byte

0

1

2

3

4

5

6

7

PV

Index

Subindex

Ctrl

Figure 4: Parameter channel

Ctrl

Byte "Ctrl" contains the request to read or write a parameter.

The transmit data contains the information whether a parameter is to

be read or written. The receive data contains the information whether

the read request or the write request were successful.

Transmit data:

Ctrl

Function

02h

No request

12h

Read request

22h

Write request (word)

32h

Write request (double word)

Receive data:

Ctrl

Function

02h

Request not yet completed

12h

Read request or write request successfully completed (word)

22h

Read request or write request successfully completed (double

word)

72h

Error message

Only one request can be processed at a time. The slave provides the

response until the master sends a new request. If a response includes

parameter values, the slave responds with the current value in the

case of a repetition.

NOTE: Read requests are only executed by the slave if the value

changes from 02h to 12h. Write requests requests are only executed

by the slave if the value changes from 02h to 22h or to 32h.

Subindex

The byte "Subindex" must be set to the value 00h.

Index

The word "Index" contains the parameter address.

0198441113843,V1.01,01.2012

See the product manual for a list of the parameters.

26	Modbus-TCP module

Image 26

Schneider Electric LXM32M manual Parameter channel

Contents

LXM32M Important information Table of contents Diagnostics and troubleshooting Accessories and spare parts LXM32M About this manual Further reading Introduction Fieldbus products on the network LXM32M Intended use Before you begin safety informationQualification of personnel Hazard categories Basic information Standards and terminology Function principle BasicsModbus TCP technology Bus topology Network service Snmp Client / server model Modbus TCP protocol Structure of a Modbus message Mbap header Field Length Description Modbus TCP communication Connection management Modbus response to a Modbus request Excep Name Description Tion Code Reading and writing parameters Address Value 4 I/O scanning to Drive Profile Lexium 4.1 I/O scanning Output Byte Meaning Data type Parameter address 4.2 I/O scanning Input Bit Meaning Bit Signal Factory setting Inputs Parameter channel Ctrl Subindex Index Field Bytes Value Meaning Modbus services Function CodeFunction Code 3 Read Multiple Registers Function Code 8 Diagnostics Sub-function Code Diagnostics function Function Code 16 Write Multiple Registers Function Code 23 ReadWrite Multiple Registers Function Code 43 Encapsulated Interface Transport Object ID Object name Value Examples Example of Function Code LXM32M Description Order no InstallationInstallation of the module Electrical installation Pin Signal Meaning Commissioning Commissioning the device First Setup Switching on the device Power stage supply is switched off Manual / MAnu Manual Bootp / boot BootpManual assignment of the network address Dhcp / dhcP Dhcp IP address Ethernet module, byte Assignment of the network address via Bootp Assignment of the network address via Dhcp Setting the transmission rate Setting the protocol Setting the gateway Set the IP address of the gateway with the parameters Master with Word Swap Activating I/O scanning Setting I/O-ScanningSetting the master for I/O scanning Setting the mapping for I/O scanning PLC Setting the web server Setting communication monitoring for I/O scanning 0198441113843, V1.01 Operation Bit Name Meaning Operating statesIndication of the operating state Changing the operating state Bit Name Meaning Operating state Bit Name Description Indicating and monitoring the operating modeOperating modes Starting and changing an operating mode Bit Name Description Overview of operating modes MODE+ACTION Operating mode Jog Operating mode Electronic Gear Operating mode Profile Torque 24 h Operating mode Profile Velocity 23 h Operating mode Profile Position Operating mode Homing Operating mode Motion Sequence LXM32M6 Operation Extended settings Web server Main menu Submenu Content User interface Accessing the FTP server FTP server FDR service Fast Device Replacement LXM32M Diagnostics and troubleshooting Fieldbus communication error diagnostics Status LEDs Color Status Meaning Color Meaning for EtherNet/IP Meaning for Modbus TCP Error indication Excep Name Description Tion Code LXM32M Accessories and spare parts Cables LXM32M Glossary Units and conversion tables Torque TemperatureRotation Moment of inertia Terms and Abbreviations LXM32M Index LXM32M