Chapter 1 Functions; Master Function (I/O Communication) - Mitsubishi Electric MELSEC iQ-R Series User Manual

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FUNCTIONS
1.1

Master Function (I/O Communication)

This function communicates the I/O data with each slave node (63 at maximum) using the buffer memory of the RJ71DN91.
Input 512 bytes (256 bytes at maximum per node) and output 512 bytes (256 bytes at maximum per node) can be
communicated.
Setting for I/O communication with each slave node
• Set the connection type and number of I/O points for the I/O communication with each slave node with the engineering tool.
• The master function parameter can be set with a program as well. ( Page 97 Setting the Parameter with a Program)
Reading/writing I/O data
• The I/O data is stored in the following buffer memory.
Buffer memory address Item
Un\G1792 to Un\G2047 Master function receive
data
Un\G2304 to Un\G2559 Master function
transmit data
Description
The data received from each slave node is stored.
Data to be transmitted to each slave node is set.
Reference
Page 88 Master function receive data
(Un\G1792 to Un\G2047)
Page 88 Master function transmit data
(Un\G2304 to Un\G2559)
1 FUNCTIONS
1.1 Master Function (I/O Communication)
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