Omron SYSMAC CJ - REFERENCE MANUAL 08-2008

1058
Network Instructions Section 3-25
5. The following two methods can be used to send a FINS command to a host
computer through a serial port with the host link host link while initiating
communications from the PLC, or the serial gateway function (converted
to CompoWay/F, Modbus-RTU, or Modbus-ASCII).
a) Set the destination unit address (bits 00 to 07 of C+3) to the unit ad-
dress of the CPU Unit or Serial Communications Unit/Board and set
the serial port number (bits 08 to 11 of C+2) to 1 for port 1 or 2 for port
2.
b) Set the destination unit address directly into bits 00 to 07 of C+3. In this
case, set the serial port number in bits 08 to 11 of C+2 to 0 for direct
specification.
Serial Communication Unit ports
Serial Communication Board ports
CPU Unit ports
6. 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.
7. The unit address indicates the Unit, as shown in the following table.
Unit address
(C+3, bits 00
to 07)
Unit Serial port number
(C+2, bits 08 to 11)
Serial port
00 hex CPU Unit 1 hex Built-in RS-
232C port
2 hex Peripheral
port
10 hex + unit
number
Serial Communications
Unit (CPU Bus Unit)
1 hex Port 1
2 hex Port 2
E1 hex Serial Communications
Board (Inner Board)
(CS Series only)
1 hex Port 1
2 hex Port 2
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