Omron SYSMAC CJ1W-SCU21-V1, Operation Manual

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Protocol Conversion Section 6-5
Executing Smart Active Parts Using an NS-series PT (Sending Internal FINS Messages)
The Board/Unit converts the FINS messages to CompoWay/F protocol for
sending in this operation.
Note (1) The FINS header contains the following information.
• Remote destination network address (DNA)
• With routing tables that treat serial communications path as a network:
Network address corresponding to serial port in the routing tables.
• Without routing tables that treat serial communications path as a net-
work: Network address for specifying actual remote PLC.
• Remote destination node address (DA1)
• With routing tables that treat serial communications path as a network:
00 hex (local PLC’s internal communications) (For serial-to-serial-to-
serial conversion, increment the Host Link unit number by 1.)
• Without routing tables that treat serial communications path as a net-
work: Node address for specifying actual remote PLC (For serial-to-
serial-to-serial conversion, increment the Host Link unit number by 1.)
• Remote destination unit address (DA2)
Unit address of serial port
Access from PT on Ethernet or serial NT Link Details Routing tables
to treat serial
communication
s path as
network
Note When the NS-series PT is connected serially to the
PLC using serial communications mode (1:N NT
Links), and the NS-series PT sends FINS com-
mands encapsulated in NT Link commands using
Smart Active Parts, the CPU Unit removes the NT
Link header, etc. from the received command, con-
verting it to a FINS command, and transfers the
command to the Serial Communications Board/
Unit. The Serial Communications Board/Unit uses
the Serial Gateway to convert the command into
the specified protocol. This operation enables seri-
ally connected devices to access the Serial Com-
munications Board/Unit from Smart Active Parts
using an NS-series PT.
Access via serial communications using
CompoWay/F is possible from a PT con-
nected to the network by executing a
Smart Active Part that is connected seri-
ally, which automatically sends an internal
FINS command. Optional
NS-series PT
Smart Active Part
FINS header
2803
FINS message (sent internally)
Serial Communications Unit/Board
CPU Unit
RS-485 (CompoWay/F)
Ethernet
CompoWay/F
command
CompoWay/F
command
Protocol
conversion
CompoWay/F-compatible
OMRON component