Omron SYSMAC CS1W-ETN21 Operation Manual page 72

Basic Settings
Depending on the value that is set, the IP address has a great influence on
the connectability of the Ethernet Unit. To make full use of the Ethernet func-
tions, it is necessary to study the applications and network system design
when determining IP address allocations. Before setting the IP address, refer
to SECTION 5 Determining IP Addresses.
There are several ways to set IP addresses.
Default Setting
The Ethernet Unit operates using the default IP address when the Unit is
mounted to the PLC and initially registered in the I/O tables (i.e., when the
Unit settings have not been made and the IP Address Display/Setting in the
CPU Bus Unit Words Allocated in the DM Area is still all zeros).
The default IP address is determined as follows:
Default IP address = 192.168.250.FINS node address
The FINS node address is set by the rotary switch on the front of the Ethernet
Unit. If the defaults are used for the IP address and the Unit settings, the set-
tings will be as shown below.
Item
IP address
Subnet mask
Broadcast settings
Baud rate
TCP/IP keep-alive
IP router table
Setting the IP Address in the CPU Bus Unit Words Allocated in the DM
Area
This method sets the IP address in the IP Address Display/Setting Area in the
CPU Bus Unit Words Allocated in the DM Area, when the IP address is not set
in the Unit Setup. When the IP address is set in the Unit Setup, the IP Address
Display/Setting Area becomes the area for displaying the settings.
To make settings in the IP Address Display/Setting Area, use the CX-Pro-
grammer or Programming Console to write the values. In order for the new
settings to go into effect, either the Ethernet Unit must be restarted or the
power must be turned ON again to the PLC.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
m+98 (1)
m+99 (5)
IP address: (1)(2).(3)(4).(5)(6).(7)(8) (hexadecimal)
If only the IP address is set, according to the IP Address Display/Setting Area,
and the defaults are used for all other Unit settings, the settings will be as
shown below.
Item
IP address
Subnet mask
Broadcast settings
Baud rate
TCP/IP keep-alive
IP router table
Operation status
192.168.250.FINS node address
255.255.255.0 (Class C mask)
4.3BSD
Auto
120 min.
None (IP router not enabled)
(2) (3)
(6) (7)
Status
Words allocated for CPU Bus Unit (m+98 to m+99)
Uses value corresponding to IP address class.
4.3BSD specifications
Auto
120 minutes
Not set. (IP routing not supported.)
Section 2-8
(4)
(8)
47