Example Of User Defined Device Allocation - Mitsubishi FX3U Series User Manual

FX Series Programmable Controllers
3U
User's Manual - MODBUS Serial Communication Edition
9.4.2

Example of user defined device allocation

The following table provides an example of a valid user defined device allocation.
Device
Allocation
Data set
1 D8470(4bit)
2 D8472(4bit)
3 D8474(4bit)
4 D8476(4bit)
5 D8478(4bit)
6 D8480(4bit)
7 D8482(4bit)
8 D8484(4bit)
The example program below shows the defined MODBUS defined device allocation for the table on the
previous page.
90
Block Size / Number of
Device Code
5H(X) D8470(12bit)
0H(M) D8472(12bit)
8H(TS) D8474(12bit)
9H(CS) D8476(12bit)
CH(D) D8478(12bit)
DH(R) D8480(12bit)
FH(CN) D8482(12bit)
0 D8484(12bit)
9.4 User defined MODBUS Device Address Assignment
PLC Head Device
Devices
2 D8471
4 D8473
8 D8475
2 D8477
13 D8479
16 D8481
8 D8483
0 D8485
9 Slave Specification
PLC Mapping
Address
Coil 0-31
0
→
Coil 32-95
128
→
M128-M191
H-Register 0-7
0
→
TS0-TS127
H-Register 8-9
128
→
CS128-CS159
H-Register 10-217
1000
→
D1000-D1207
H-Register 218-473
0
→
H-Register 474-489
200
→
CN200-CN207
0 Unused
X0-X37
R0-R255