Chapter 13 Contents And Registration Of User Frames For Data Communication; User Frame Types And Contents During Communication; User Frames To Be Registered And Used By The User - Mitsubishi Electric MELSEC iQ-R Series User Manual

13
CONTENTS AND REGISTRATION OF USER
FRAMES FOR DATA COMMUNICATION
User frames are used to register some part, or all of messages exchanged between a target device and C24 in advance and
use them to check the data to be transmitted or received.
The following functions can use C24 user frames to transmit and receive data.
• MC protocol on-demand function.(Page 267 ON-DEMAND DATA COMMUNICATIONS USING USER FRAMES)
• The data transmit/receive function using the nonprocedural protocol (Page 276 DATA COMMUNICATIONS USING
USER FRAMES)
Data can be transmitted and received by registering the corresponding user frames to C24 in advance to match the data
contents that are transmitted and received between the target device and C24.
This chapter explains the data that can be registered, the data contents that are transmitted and received, and registering to
C24 of user frames that can be used in data communications with the target device.
For information on how to use user frames in each data communication function, refer to the following sections.
Page 267 ON-DEMAND DATA COMMUNICATIONS USING USER FRAMES
Page 276 DATA COMMUNICATIONS USING USER FRAMES
13.1
User Frame Types and Contents During
Communication
This section explains the types of user frames handled by C24 and the data contents that are transmitted and received.
The following two types of user frames are available. Either type can be used as a user frame.
Frame type
User frame
Default registration frame

User frames to be registered and used by the user

The following explains data to be registered, data contents that are transmitted and received, and how C24 handles user
frames registered C24 flash ROM or buffer memory by the user.
Overview
User frames registered by the user are frames that contain arbitrary data according to the specifications of the target device,
and the data arrangement are determined by the user.
13 CONTENTS AND REGISTRATION OF USER FRAMES FOR DATA COMMUNICATION
250

13.1 User Frame Types and Contents During Communication

Overview
A frame that contains arbitrary data arranged according to the specifications
of a target device. The data arrangement can be defined by a user.
A frame that is registered in C24 in advance. The frame cannot be changed by
a user.
Reference
Page 250 User frames to be
registered and used by the user
Page 258 Default registration frame
(read only)