Send And Recv; Fins Communications Service (Fins Commands And Responses); Socket Services - Omron SYSMAC C200HW-PCU01 Operation Manual

Communications
Software Configuration

6-3-3 SEND and RECV

6-3-4 FINS Communications Service (FINS Commands and Responses)

6-3-5 Socket Services

SEND
RECV
CMCR
Note FINS commands are issued by using CMCR.
The three communication methods are outlined below.
Data is transmitted from the PC Card Unit using the SEND and RECV instruc-
tions. Although it is necessary to specify the data for transmission, detailed data
processing is automatically performed by the Unit.
Refer to Section 8 Using SEND(90) and RECV(98) for details on SEND and
RECV.
The FINS communication service is explained below in three categories: when
the PC Card Unit receives a FINS command; when a FINS command is sent
from the PC Card Unit; and when FINS communication is carried out between
the computer and the PC Card Unit.
For details on FINS commands and responses, refer to Section 9 FINS Com-
mands and Section 11 Using FINS Commands and Responses.
When the PC Card Unit Receives a FINS Command
When the PC Card Unit receives a FINS command, it automatically interprets
the command and sends a response. All processing is conducted automatically,
so there is no need to program the PC to respond to FINS commands.
When a FINS Command is Sent From the PC Card Unit
A FINS command is issued using the CMCR instruction, and a response is
returned from the recipient of the command. That response is returned automat-
ically if the recipient of the FINS command is a C200HX/HG/HE or CVM1/CV
Programmable Controller.
FINS Communication Between the Computer and the PC Card Unit
To use FINS commands from a computer, create the command data in the pro-
gram at the computer according to the FINS command format. Have the FINS
responses that are returned form the PC Card Unit analyzed and processed
according to that format. For details, refer to Section 9 FINS Commands.
A socket is an interface which allows a user program to directly use TCP (Trans-
mission Control Protocol) and UDP (User Datagram Program). Socket services
are employed by using the CMCR instruction. Using socket services allows the
PC Card Unit to communicate with UNIX workstations and FA Computers other
than OMRON Programmable Controllers, with any protocol. For details, refer to
Section 10 Socket Services.
CMCR CMCR
Section 6-3
PC Card Unit
Ethernet Card
71