Serial Communications - Omron SYSMAC CS Series Programming Manual

Serial Communications

6-3

Serial Communications

Protocol Connections
Host link
Host computer
or
No-protocol
Standard external device
NT link
OMRON PTs
1:N or 1:1
(Programmable Terminals)
Peripheral
Programming Devices
bus
(Not Programming Consoles)
The CS/CJ-series CPU Units support the following serial communications
functions. Host link communications and no-protocol communications are
described in detail later in this section.
1) Various control commands such as reading
OMRON PT
(Programmable
and writing I/O memory, changing the operat-
Terminal)
ing mode, and force-setting/resetting bits can
be executed by issuing host link commands or
FINS commands from the host computer to
the CPU Unit.
2) It is also possible to issue FINS commands
from the CPU Unit to the host computer to
send data or information.
Use host link communications to monitor data
such as operating status, error information, and
quality data in the PC or send data such as pro-
duction planning information to the PC.
Communicate with standard devices connected
to the RS-232C port without a command–
response format. Instead the TXD(236) and
RXD(235) instructions are executed from the pro-
gram to transmit data from the transmission port
or read data in the reception port. The frame
headers and end codes can be specified.
Data can be exchanged with PTs without using a
communications program in the CPU Unit.
Provides high-speed communications with Pro-
gramming Devices other than Programming Con-
soles.
(Remote programming through modems is not
supported.)
Description
Section 6-3
Ports
Peripheral RS-232C
OK OK
Not allowed OK
OK OK
OK OK
221