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3-4
Section
Switch Settings
26
numbers. Use the Node Number Switches to set the node number between 01
and 7E hexadecimal (1 to 126 decimal). Do not set a number that has already
been set for another node on the same network.
Setting range:
01 to 7E (1 to 126 decimal)
The left switch sets the sixteens digit (most significant digit) and the right switch
sets the ones digit (least significant digit). The node number is factory-set to 01.
When using the automatic generation method for address conversion, set the
node number to the same value as that of the Local IP Address Switches. If this is
not possible, then either the IP address table method or the combined method
must be used for address conversion. For details, refer to 4-2 CPU Bus Unit Sys-
tem Setup.
If the FINS communications service is not being used over the Ethernet network,
then there is no problem if the node number duplicates that of another Ethernet
Unit. The node number must still be set from 01 to 7E, however, or the ERC indi-
cator will light.
Note Turn OFF the power supply before setting the node number.
3-4-3 Setting the Local IP Address
The nodes on an Ethernet network are identified by IP addresses. Each IP ad-
dress is set with 32 bits of binary data. These 32 bits are divided into four 8-bit
fields called octets, and each octet is expressed as four decimal numbers. At the
Ethernet Unit, four bits are expressed as on hexadecimal digit, and the eight
hexadecimal rotary switches (the Local IP Address Switches) on the back of the
Unit are used to set the local IP address. Set the eight switches in hexadecimal
as shown below, combining SW1 and SW2, SW3 and SW4, SW5 and SW6, and
SW7 and SW8. Each switch can be set from 0 to F.
Local IP Address Switch No.
Setting range:
0 to F
1 2 . 3 4 . 5 6 . 7 8 .
The switches are all factory-set to 0 (00.00.00.00). The Ethernet Unit cannot be
used with this setting; a proper IP address must be set. The following settings
cannot be made for the IP address, or the ERC indicator will flash.
All bits in the network number field set to 0 or 1.
All bits in the host number field set to 0 or 1.
All bits in the subnet number field set to 1.
The beginning of the IP address set to 127 (7F Hex)
Example: 127.35.21.16