Class1 Instance Communications - Mitsubishi Electric MELSEC iQ-R Series User Manual

Class1 instance communications

This method is mainly used for communications with an adapter. A connection to be opened is managed by using the IP
address of the external device and instance ID, and data communications are performed periodically between the originator
and the target.
The CC-Link IE TSN Plus module performs connection open processing in the timing in which 'EtherNet/IP communication
start request' (Un\G7340096) is changed from 0 (stop request).
When a connection is opened successfully, data communications are performed according to the connection settings.
The following figure shows data communications for which the application type is Exclusive Owner when the CC-Link IE TSN
Plus module is the originator.
RJ71GN11-EIP

Originator

Timing to be sent/received
is not synchronized.

RPI
'Class1 Input Area'
(Un\G7348224 to
Un\G7533055)
'Class1 Output Area'
(Un\G7536640 to
Un\G7721471)
 Write the Class1 instance communications connection settings.
 'EtherNet/IP communication in process' (X10) turns on.
 A connection is established.
 Data are sent and received.
Since the timing of data sending differs between the originator and the target, the data communication timing
is not synchronized. In addition, since RPI is managed on a connection basis, even when the same RPI is set,
the data sending timing per connection is not synchronized.
Data communications procedure
1.
Connection settings
Set a connection in "EtherNet/IP Configuration". ( Page 117 "EtherNet/IP Configuration" window)
2.
Establishing a connection
'EtherNet/IP communication in process' (X10) turns on at the following timing, and a connection starts to open.
• A value other than 0 is set for 'EtherNet/IP communication start request' (Un\G7340096).
• When the EtherNet/IP communication automatic start function is enabled, initialization after power-on is completed.
3.
Sending/receiving data
When a connection is opened normally, data is sent/received at the RPI interval as follows.
• The data sent by the target is stored in 'Class1 Input Area' (Un\G7348224 to Un\G7533055).
• The data set in 'Class1 Output Area' (Un\G7536640 to Un\G7721471) of the originator is sent to the target.
External device
Connection open
Response (normal)
Receive data
Send data
Target

RPI

12 FUNCTIONS
12.2 Cyclic Transmission Function
12
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