Modbus Device Sizes - Mitsubishi Electric QJ71MT91 User Manual

7 PARAMETER SETTING

7.4.1 MODBUS device sizes

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The MODBUS devices available for the QJ71MT91 are given in the following table.
MODBUS Device Type
Coil
Input
Input register
Holding register
Extended file register
*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.
Read/Write Access Points
Read/Write 65536 points
Read 65536 points
Read 65536 points
Read/Write 65536 points
(*1) 4184064 points (*2)
MELSEC-Q
MODBUS Device Number
000001 to 065536
100001 to 165536
300001 to 365536
400001 to 465536
File number: 0 to 418 (*3)
600000 to 609999
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