Yaskawa MP2300S Basic Module - Manual (Page 237)

6.2 Communication with Other MP Series
6.2.3 When the MP2300S Acts as Master (I/O message communication function is used)
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Continued from the previous page
The communication setting and the ladder program creation are now finished, when MP2300 acts as a slave.
( 3 ) How to Start Communication
1.
The MP2300 side starts to receive the messages.
As the sample ladder program starts the message receive operation just after the system startup, you are not
required to do anything. In normal operation, accept the default.
2. The MP2300S side transmits messages.
When an I/O message communication function is used, message transmit operation status automatically.