Omron NB3Q-TW00B Setup Manual page 64

Local IP Address
The local IP address indicates the IP address of the Ethernet Unit that is used to set the settings.
The following IP address settings are not possible.
Net ID with all bits set to 0 or 1.
Host ID with all bits set to 0 or 1.
Subnet ID with all bits set to 1.
IP addresses that begin with 127 (7F Hex) (e.g., 127.35.21.16).
Subnet Mask
When more than one node is connected to the network, network operation and management can be
difficult. Therefore, for convenience, configure the system by dividing a single network into multiple
sub-networks. The system operates internally as multiple networks, but externally appears as a
single network.
To operate a system in this way, divide the host ID field of the IP address into a subnet ID field and a
host ID field.
The subnet ID field is identified by the information in the subnet mask. The subnet mask is a bit
mask in which the net ID and subnet ID fields are 1 and the host ID field is 0.
Example: 11111111 11111111 11111111 00000000 → FFFFFF00
The subnet mask must have a value that is common to all nodes on the same sub-network.
Setting the subnet mask is not required if sub-networks are not used. The system recognizes subnet
masks without a subnet ID field (i.e., subnet masks with net ID and host ID fields only).
The methods for setting each Unit are described next.
CS-series PLCs
Note 1 Always turn OFF the power to the PLC before setting the rotary switches.
2 Create I/O tables for the CPU Unit when setting the unit number for the first time or changing settings.
CS-series Ethernet Units:
CS1W-ETN21
Setting the Front Panel Switches
Setting Unit Numbers
Always set the unit numbers so that the unit numbers of other CPU Bus Units mounted to the CPU
Unit are all unique.
Use a small screwdriver to set the rotary switches, being careful not to damage them.
The factory setting is 0.
UNIT
NO.
NB-series Programmable Terminals Setup Manual(V107)
2 Installing the NB Unit and Connecting Peripheral Devices
Setting range
0 to F
WWW.NNC.IR
2
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