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6-3
Chapter 6: APPENDIX
1.2. Network Address Translation (NAT) and Setup Software Programs
Because the Internet cannot be accessed using the local IP address, the local IP address must be converted
into the global IP address by means of Network Address Translation (NAT).
Internet
Router 2Router 1
NX-100/100S
(C)
NX-100/100S
(A)
NX-100/100S
(B)
LAN
Connections can be made from Unit C to Unit A using the global IP address. The global IP address used for
the connection is converted into the local address for Unit A by Router 1.
Note that the NX-100 Setup program is not designed to enable the NAT function. Use a browser to select
units connected by way of the NAT as the target connection unit for the broadcast pattern, contact or serial
bridge* in the NX-100 and NX-100S unit settings.
* The serial bridge function is valid only for the NX-100.
1.3. IP Broadcast and Unit Scan
The IP broadcast communication method is used to scan the units connected to the network. Units can only
be scanned within the effective range of the IP broadcast.
The address to be used is 255.255.255.255.
NET1
NET2
Router
Router
NX-100/100S
(C)
NX-100/100S
(A)
NX-100/100S
(B)
PC
IP broadcast does not reach beyond the router covering range even in the LAN.
In the above figure, NET1 represents the LAN and NET2 represents the effective range for IP broadcast. For
example, if the PC is used to scan the units in the figure, Unit C cannot be scanned even though it is located
within the same LAN.
Note
Follow the instructions of the network management personnel for the effective range of the IP broadcast.