1046
Network Instructions Section 3-25
b) Set the destination unit address directly into bits 00 to 07 of C+2. In this
case, set the serial port number in bits 08 to 11 of C+1 to 0 for direct
specification.
Serial Communication Unit ports
Serial Communication Board ports
CPU Unit ports
4. When specifying the serial port without a routing table for the serial gate-
way function (conversion to host link FINS), set the serial port’s unit ad-
dress in the destination network address byte.
5. The unit address indicates the Unit, as shown in the following table.
6. The maximum node number depends on the network being used. For a
Controller Link, the allowed range is 00 to 20 hexadecimal (0 to 32). Set
the destination node number to FF to broadcast to all nodes; set it to 00 to
transmit within the local node.
7. Refer to
Automatic Allocation of Communications Ports on page 1032 for
details on using automatic allocation of the communications port number
(logical port).
8. When the destination node number is set to FF (broadcast transmission),
there will be no response even if bits 12 to 15 are set to 0.
Port Port’s unit address Example: Unit number = 1
Port 1 80 hex + 4 × unit number 80 + 4 × 1 = 84 hex (132 decimal)
Port 2 81 hex + 4 × unit number 81 + 4 × 1 = 85 hex (133 decimal)
Port Port’s unit address
Port 1 E4 hex (228 decimal)
Port 2 E5 hex (229 decimal)
Port Port’s unit address
Peripheral FD hex (253 decimal)
RS-232C FC hex (252 decimal)
Unit Unit address setting
CPU Unit 00 hex
CPU Bus Unit 10 hex + unit number
Special I/O Unit (except
C200H-series Special I/O
Units)
20 hex + unit number
Inner Board (CS Series
only)
E1 hex
Computer 01 hex
Unit connected to net-
work (not necessary to
specify Unit)
FE hex
Direct specification of the
serial port’s unit address
Serial Communications Unit ports
Port 1: 80 hex + 4 × unit number
Port 2: 81 hex + 4 × unit number
Serial Communications Board ports
Port 1: E4 hex (228 decimal)
Port 2: E5 hex (229 decimal)
CPU Unit ports
Peripheral port: FD hex (253 decimal)
RS-232C port: FC hex (252 decimal)
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