Hardware manual
Chapter2 Connection to a PLC
2-246
12.6.6.3 Reference Numbers
Reference numbers are used to specify a device address with the MODBUS/TCP.
The reference number is obtained by subtracting 1 from the 1
st
to 5
th
value of the device address,
and is expressed in hexadecimal format.
The following table lists the address of each device and the corresponding reference number.
Address
Reference
No.
Address
Reference
No.
Address
Reference
No.
Address
Reference
No.
C 1 0001 I 100001 0001 HR
400001
0001 IR
300001
0001
C 2 0002 I 100002 0002 HR
400002
0002 IR
300002
0002
… … … … … … … …
C 65535 FFFE I 165535 FFFE HR
465535
FFFE IR
365535
FFFE
C 65536 FFFF I 165536 FFFF HR
465536
FFFF IR
365536
FFFF