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MELSEC-Q
7 PARAMETER SETTING
7.4.1 MODBUS
®
device sizes
The MODBUS
R
devices available for the QJ71MT91 are given in the following table.
MODBUS
R
Device Type Read/Write Access Points MODBUS
R
Device Number
Coil Read/Write 65536 points 000001 to 065536
Input Read 65536 points 100001 to 165536
Input register Read 65536 points 300001 to 365536
Holding register Read/Write 65536 points 400001 to 465536
Extended file register (*1) 4184064 points (*2)
File number: 0 to 418 (*2)
600000 to 609999
*1: The availability of extended file register read/write depends on that of the file register (ZR)
read/write to the programmable controller CPU.
For example, if the file register (ZR) is stored on a Flash card, the extended file register is
read only because the file register (ZR) is read only.
For details, refer to the QCPU user's manual (explanation, program fundamentals).
*2: The maximum access points and maximum file number of the extended file register depend
on the file register (ZR) assignment size of the programmable controller CPU.
For details, refer to the QCPU user's manual (explanation, program fundamentals).
*3: Refer to Section 7.4.4 for the extended file register assignment.
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