Mitsubishi Electric MELSEC iQ-R Series User Manual page 93

Slave function parameter setting area
This area is used to set the parameters for slave function.
■Slave function receive size setting (Un\G1550)/Slave function transmit size setting (Un\G1551)
Set the number of I/O points for the slave function.
The following table lists the slave function parameters.
Buffer memory address Item
Un\G1550 Slave function receive byte size (number of input
points) setting area
Un\G1551 Slave function transmit byte size (number of output
points) setting
Slave function transmit/receive data area
This area is used to store the slave function transmit/receive data.
■Slave function receive data (Un\G2816 to Un\G2879)
The data received from the master node is stored.
The size set in 'Slave function receive size setting' (Un\G1550) is valid.
Buffer memory address
Un\G2816
Un\G2817
Un\G2818

■Slave function transmit data (Un\G3072 to Un\G3135)
Set the data to be transmitted to the master node.
Transmit the I/O data for the size set in 'Slave function transmit size setting' (Un\G1551).
Buffer memory address
Un\G3072
Un\G3073
Un\G3074

To use the RJ71DN91 as a master node, set an even number for the number of byte modules.
When an odd number is set for the number of byte modules, and the word module and double word module
are set simultaneously, the word data and double word data cannot be transmitted/received normally.
Description
Set the I/O data receive size for the slave function.
(Setting range: 0 to 128 bytes, default value: 8 bytes)
Set the I/O data transmit size for the slave function.
(Setting range: 0 to 128 bytes, default value: 8 bytes)
b15 to b8
2nd byte
4th byte
6th byte

b15 to b8
2nd byte
4th byte
6th byte

b7 to b0
1st byte
3rd byte
5th byte

b7 to b0
1st byte
3rd byte
5th byte

Appendix 3 Buffer Memory
A
APPX
91