Creating A Message Variable; Configuring The Message Variable For Configuration - Siemens SIMATIC Ident Function Manual

Configuring the instructions
4.4 Project preparation
instruction have a "HW_CONNECT" parameter where the respective "HW_CONNECT"
variable must be created for the corresponding channel.
4.4.2

Creating a message variable

A message variable must be created for each module. The parameter assignment is
transferred with the aid of this variable and this is required for the "MSG_PARAM"
parameter of the corresponding "Param" instruction (e.g. "Param_RF18xC").
Two additional message variables are required for each channel/reading point of a
module for sending and receiving Ethernet/IP telegrams. The message variable for
receiving is required for the "MSG_Read" parameter of all Ident instructions. The
message variable for sending is required for the parameter "MSG_WRITE" of all Ident
instructions.
Variables of the "MESSAGE" type can only be created in the "Controller Tags".
4.4.2.1

Configuring the message variable for configuration

The message variable for the transfer of the configuration ("MSG_PARAM" parameter)
must be structured as follows:
Table 4- 3
Tab
Configuration
Communication
18
Structure of the message variable for transferring the configuration
Parameter
Message Type
Service Type
Service Code
Source Element
Path
Description / Value
CIP Generic
Custom
0x41
<Configuration variable>.Parameter
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Ident profile, Add-on instruction for Rockwell systems
Function Manual, 07/2020, C79000-G8976-C410-04