Frames; Parameter Settings For Mc Protocol Communication; Applicability Of Multiple Cpu Systems - Mitsubishi Electric MELSEC iQ-R Series User Manual

Frames

The following explains the types of frame (data communication message) used for a target device to access a supported
equipment using the MC protocol, and the purpose of each frame.
The data communication frames are as shown below.
Frame Feature and purpose
4C frame Accessing from a target device to the maximum access
range is available.
3C frame The message format of access route is more simple than
4C frame.
2C frame
Data communication software for MELSEC-QnA series
programmable controller can be used.
1C frame 1C frame is the same message structure as when
accessing using MELSEC-A series computer link
modules.
Data communication software for MELSEC-A series
programmable controller can be used.

Parameter settings for MC protocol communication

Set the transmission specification, and the communication protocol with target devices.
Select the communication protocol setting from MC protocol (from Format 1 to 5).
Navigation window  [Parameter]  [Module Information]  "Module Name"  [Module Parameter]  "Basic Settings"
 "Various control specification"
Configure other settings according to the system being used.
For details of the setting content, refer to the following chapter.
Page 422 PARAMETER SETTING

Applicability of multiple CPU systems

When a target device accesses to RCPU, which is a multiple CPU system, accessing to the control CPU or Non-control CPU
of the multiple CPU system is available by specifying the target RCPU in "Request destination module I/O number" of MC
protocol 4C frame.
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N
Q
1 DATA COMMUNICATION USING MC PROTOCOL
24
1.2 Data Communication
Compatible message format
Dedicated protocol for C24 (QnA extension frame)
Dedicated protocols for C24 (QnA frame)
Dedicated protocols for C24 (QnA simplified frame)
Dedicated protocols for A series Computer link modules.
Format
Formats 1 to 5
Formats 1 to 4