Chapter 7 Communication function
7-121
[Table 7.32] describes data memory mapping between MODBUS and GLOFA Cnet.
[Table 7.32] MODBUS communication driver supported function code
MODICON controller address
GLOFA-PLC Address
Name
[Note 1]
Address
[Note 2]
Address
mapping
Device
[Note 3]
Address
[Note4]
Remark
(0)Read Coil Status
8 ~ 9992
%MX
8 ~ 9992
Bit Read
(1)Read Input Status
8 ~ 9992
%MX
8 ~ 9992
Bit Read
(4)Read Holding Reg
1 ~ 4999
%MW
1 ~ 4999
Word Read
(3)Read Input Reg
1 ~ 4999
%MW
1 ~ 4999
Word Read
(0)Force Single Coil
1 ~ 9999
%MX
1 ~ 9999
Bit Write
(4)Preset Single Reg
1 ~ 4999
%MW
1 ~ 4999
Word Write
(4)Presel Multi Reg
1 ~ 4999
%MW
1 ~ 4999
Word Write
Remark
[Note 1] Figures in ( ) of each item are reference values of MODICON Controller.
[Note 2] For reading of Coil Status & Input Status, the address shall be set in a multiple of 8.
(Ex.) 8, 16, 32, 8000
Î
OK
3, 5, 27, 9991
Î
ERROR
[Note 3] All addresses of MODICON Controller are mapped in %MX / %MW areas of GLOFA-PLC causing
repeated area.
(pay attention to setting)
(Ex.) Read Holding Reg 100
Æ
%MW100 = Read Input Reg 100
Æ
%MW100 (same area)
[Note 4] Since start address of MODICON Controller is ‘1’, access to GLOFA PLC ‘0’ address is unavailable,
however, access to addresses staring from 1 is available. As for Word areas, max.4999 addresses only
are accessible.(10 kbytes)