3-1
Section
Before Operation
21
Note The rightmost byte of the host number becomes the FINS node number, and the
rest of the host number becomes all zeroes.
Example 1
Local IP address:
130.25.36.8
Subnet mask:
255.255.0.0
Remote FINS node number:
5
Remote IP address
Example 2
Local IP address:
130.25.36.8
Subnet mask:
255.0.0.0
Remote FINS node number:
5
130.25.0.5
Host number
Becomes 0.
Remote IP address
130.0.0.5
Host number
Becomes 0.
Note When using either the address conversion method (the default) or the combined
method, set the local IP address switches 7 and 8 on the back of the Ethernet
Unit and the node number to the same values, and set the other host settings to
0. If the values are wrong, the ERC indicator will flash.
Characteristics of Automatic Generation Method
The automatic address generation method has the advantage of clarifying the
correspondence between the FINS address and the IP address, but it also has
the following restrictions.
1, 2, 3...
1. It cannot be applied outside of the range with the same network ID.
2. The remote host number must be within the range of FINS node numbers (1
to 126).
3. The Ethernet Unit’s host number and the node number must be set to the
same value.
The automatic address generation method is the default setting, so there is no
need to set it with the CX-Programmer if the setting has not been changed.
The IP address table method converts the FINS node number to an IP address
based on a preset correspondence table called an IP address table. The IP ad-
dress table is prepared in the System Setup, using the CX-Programmer. For de-
tails on the System Setup, refer to 4-2 CPU Bus Unit System Setup. With differ-
ent segments, nodes with different network IDs can also be registered.
FINS node number
IP address table
FINS node
address
IP address
IP address
18
153.214.0.62
20
153.214.0.129
23
153.218.51.8
Characteristics of IP Address Table Method
The IP address table method provides a simple correspondence table, so it has
the advantage of allowing FINS node numbers and IP address to be freely allo-
cated. It does, however, have the following restrictions.
IP Address Table
