Host Link Communications - Omron SYSMAC CS Series Programming Manual

Serial Communications
6-3-1

Host Link Communications

Command flow Command type
Host computer
Host link command
↓
PC
Host link command
FINS command
(with host link header
and terminator)
Header
PC
FINS command
↓
(with host link header
Host computer
and terminator)
Header
222
The following table shows the host link communication functions available in
CS/CJ PCs. Select the method that best suits your application.
Communications method
Create frame in the host com-
puter and issue command to the
PC. Receive the response from
the PC.
Application:
Use this method when communi-
cating primarily from the host
computer to the PC.
Create frame in the host com-
1
puter and issue command to the
PC. Receive the response from
the PC.
FINS
Application:
Use these methods when com-
municating primarily from the
Terminator
host computer to PCs in the net-
work.
Issue frame with the CPU Unit's
2
SEND/RECV/CMND instruc-
tions. Receive response from the
host computer.
Application:
FINS
Use this method when communi-
cating primarily from the PC to
Terminator
the host computer to transmit
status information such as error
information.
Note 1. The FINS command must have a host link header and terminator attached
before it is transmitted from the host computer.
Configuration
Directly connect the host computer in a 1:1
or 1:N system.
OR
Directly connect the host computer in a 1:1
or 1:N system.
OR
Communicate with other PCs in the network
from the host computer.
(Convert from host link to network protocol.)
Command
Directly connect the host computer in a 1:1
system.
Command
Communicate with the host computer
through other PCs in the network.
(Convert from host link to network protocol.)
Command
Section 6-3
Command
Command
SEND/RECV/
CMND
SEND/RECV/
CMND