Mitsubishi Electric MELSEC iQ-R02CPU - MODBUS Extended File Register Assignment

1 FUNCTIONS
1.7 Communications Using MODBUS/TCP
111
1
MODBUS devices
The following table lists the MODBUS devices supported by the RJ71EN71 and RnENCPU (network part).
*1 For the CPU module, read-only memory cannot be set in the file register.
*2 The maximum values of the number of access points and the file number for the extended file register depend on the size of the file
register (ZR) set in the CPU module. ( Page 111 MODBUS extended file register assignment)
*3 The number of access points for the extended file register is the maximum size that can be set in the CPU module (when the R120CPU
+ NZ2MC-16MBS are mounted).
MODBUS extended file register assignment
The assignment of the MODBUS extended file register to the CPU module is fixed to the file register (ZR).
The following shows the assignment to the file register of the CPU module. (The number of points for the file register shows
the maximum size that can be set in the CPU module (when the R120CPU + NZ2MC-16MBS are mounted)).
■Size of the MODBUS extended file register
The size of the MODBUS extended file register depends on the size of the file register (ZR) set in the CPU module.
For details, refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
MODBUS device type Unit Read/write Number of access
points
MODBUS device No.
Coil Bit Read/write 65536 points 1 to 65536
Input Bit Read 65536 points 100001 to 165536
Input register Word Read 65536 points 300001 to 365536
Holding register Word Read/write 65536 points 400001 to 465536
Extended file register Word Read/write
*1
10027008 points File number: 0 to 1002
*2*3
Device number: 600000 to 609999
600000
609999
600000
609999
600000
609999
600000
607007
ZR0
ZR9999
ZR10000
ZR19999
ZR20000
ZR29999
ZR10020000
ZR10027007
ZR10019999
ZR30000
10000 File number 0
10000 File number 1
10000 File number 2
7008 File number 1002
CPU module
file register (ZR)
MODBUS
extended file register