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Serial Gateway Overview Section 3-6
The header “:” (3A hex) and LRC+CR/LF are not required when sending
FINS. They are added automatically for serial communications.
3-6-6 Converting from FINS to Host Link FINS
A PC slave that is connected serially to the PC master via Host Link can be
accessed from the PC master or personal computer (see note) using FINS
messages. Accessing a device on another network via Host Link (serial com-
munications) is also possible by using FINS messages. By converting the
FINS to Host Link FINS, the PC can function as a Host Link master.
Note Applications such as CX-Programmer or CX-Protocol that use CX-
Server as a communications driver.
• Sent FINS message: FINS header + User-specified FINS command (see
note 1)
• Message after conversion: FINS command enclosed in Host Link header
and terminator (see note 2)
System Configuration Patterns
Access from CX-Programmer (Sending Internal FINS Messages)
The Board/Unit converts the FINS messages to Host Link FINS for sending in
this operation.
Access from Serially Connected CX-Programmer
Use the following method to access the serially (serial-to-serial) connected
PC from the CX-Programmer.
FINS command
(To other network)
Host Link header
Terminator
Host Link FINS command
FINS command encapsulated using Host Link
(RS-232C or RS-422A/485)
FINS message
CX-Program-
mer or other
application
using CX-
Server or
CPU Unit
(CMND(490))
User-specified
FINS command
(Via serial, network,
or CPU bus)
Serial Com-
munications
Unit/Board
User-specified FINS
command
OMRON PC (CS/CJ
Series, CVM1/CV
Series)
Serial-to-Serial Details Routing tables to treat serial
communications path as network
Personal computers (e.g., CX-
Programmer) connected seri-
ally (via tool bus or Host Link)
to the PC master can access a
PC slave that is connected
serially to the PC master via
Host Link.
Optional
Peripheral or RS-232C port
Host Link header
Serial Communications Unit/Board
CX-Programmer, etc.
Terminator
Host Link header Terminator
Used as Host Link Master
RS-422A/485 (Host Link)
CPU Unit
CS/CJ-series or CVM1/CV-series PC (Host Link Slave)
Protocol
conversion
User-specified
FINS command
User-specified
FINS command
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