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Settings for Sending FINS Commands Section 3-4
• Example 2: Serial Communications Unit
Summary of Addresses The three addresses used in FINS commands can be summarized as follows
(refer to the following diagram):
Network Address
An address that identifies the entire network. All nodes on the same network
have the same network address.
Node Address
An address that identifies an individual node on a network, such as a PLC or
host computer.
Serial port on Unit Serial port's unit address Example: Unit number 1
Serial port 1 80 hex + 04 hex × unit num-
ber
80 hex + 04 hex × 1 = 84
hex (132 decimal)
Serial port 2 81 hex + 04 hex × unit num-
ber
81 hex + 04 hex × 1 = 85
hex (132 decimal)
Unit addresses for serial port 1:
Unit addresses for serial port 2:
Serial Communications Unit
Serial port 1
Serial port
0 1 2 3 4 5 6 7 8 9 A B C D E F
80 84 8C 90 94 98 9C A0 A4 A8 AC B0 B4 B8 BC
128 132 136 140 144 148 152 156 164 168 172 176 180 184 188
88
160
Unit number
Hexadecimal
Decimal
0 1 2 3 4 5 6 7 8 9 A B C D E F
81
85
8D 91
95 99
9D A1 A5 A9 AD B1 B5 B9 BD
129 133 137 141 145 149 153
157 161
165 173 177 181 185 189
89
169
Unit number
Hexadecimal
Decimal
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