CV500BC051 Omron, CV500BC051 Datasheet - Page 193

• Manufacturer Part Number: CV500BC051
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500BC051

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6-1
168
Introduction
Source
node to
destination
node
Message service
Introduction
PLC to PLC
PLC to
computer
Computer
to PLC
C200HX/HG/HE,
CS/CJ-series, CVM1,
CV-series, or
CQM1H-series PLC
(The equivalent of SEND/
RECV and CMND are sent
from the computer pro
gram.)
User program
A program is not required for receiving
responses when the PLC executes
SEND and RECV.
C200HX/HG/HE,
CS/CJ-series, CVM1,
CV-series, or CQM1H-
series PLC
A message service is a command/response system used for data transmis-
sion between nodes on a network, i.e., PLC to PLC, PLC to computer, and
computer to PLC). The message service can also be used to control opera-
tions, such as mode changes. The message service is implemented by send-
ing commands from the user program. The following communications
instructions are used:
SEND and RECV: Instructions for sending and receiving data.
CMND: An instruction for sending FINS commands. Some FINS commands
are supported by Controller Link Units, and other FINS commands supported
by the PLC’s CPU Unit.
SEND
SEND/RECV instructions
SEND
C200HX/HG/HE,
CS/CJ-series, CVM1,
CV-series, or
CQM1H-series PLC
Command
Programming is required to receive
responses at the computer.
Computer
Computer
(Com-
mand for
CPU Unit)
A program is required for sending and
receiving data with the computer.
A program is not required for receiving
responses when the PLC executes commands.
Command
CS/CJ-series, CVM1,
CV-series, or
CQM1H-series PLC
(Not supported by the
C200HX/HG/HE.)
User program
C200HX/HG/HE,
CS/CJ-series, CVM1, CV-series
or CQM1H-series PLC
A program is not required for receiving
responses when the PLC executes
commands.
CMND instruction (FINS commands)
CMND
Command
(Command for
Controller Link
Unit or CPU
Unit)
Command
C200HX/HG/HE,
CS/CJ-series, CVM1,
CV-series, or
CQM1H-series PLC
Section 6-1
(Com-
mand for
Controller
Link Unit)
(Com-
mand for
CPU Unit)