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349
Serial Communications
Section 6-1
6-1-7
Host Link Communications
The following table shows the host link communication functions available in
CP1H PLCs. Select the method that best suits your application.
Command
flow
Command type
Communications method
Configuration
Create frame in the host com-
puter and send the command to
the PLC. Receive the response
from the PLC.
Application:
Use this method when commu-
nicating primarily from the host
computer to the PLC.
Create frame in the host com-
puter and send the command to
the PLC. Receive the response
from the PLC.
Application:
Use these methods when com-
municating primarily from the
host computer to PLCs in the
network.
Remarks:
The FINS command must be
placed between a Host Link
header and terminator and then
sent by the host computer.
Send the command frame with
the CPU Unit’s SEND, RECV, or
CMND instruction. Receive
response from the host com-
puter.
Application:
Use this method when commu-
nicating primarily from the PLC
to the host computer to transmit
status information, such as error
information.
Remarks:
The FINS command will be
placed between a Host Link
header and terminator when it is
sent. The FINS command must
be interpreted at the host com-
puter and then the host com-
puter must return a response.
Host computer
Host link command
(C Mode)
Host link command
OR
Command
Directly connect the host computer in a 1:1
or 1:N system.
FINS
Header
Terminator
FINS command
(with
Host Link header and
terminator) sent.
OR
Command
Directly connect the host computer in a 1:1
or 1:N system.
Command
Communicate with other PLCs in the
network from the host computer. (Convert
from Host Link to network protocol.)
Host computer
FINS
Header
Terminator
FINS command
(with
Host Link header and
terminator) is sent.
SEND/RECV/
CMND
Command
Directly connect the host computer in a 1:1
system.
Command
Communicate with the host computer
through other PLCs in the network. (Convert
from Host Link to network protocol.)
SEND/RECV/
CMND
Содержание CP1H-CPU - 05-2006
Страница 1: ...OPERATION MANUAL CP1H CPU Unit SYSMAC CP Series CP1H X40D CP1H XA40D CP1H Y20DT D Cat No W450 E1 02...
Страница 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Страница 3: ...iv...
Страница 11: ...xii TABLE OF CONTENTS...
Страница 15: ...xvi...
Страница 19: ...xx...
Страница 31: ...xxxii Conformance to EC Directives 6...
Страница 71: ...40 Function Blocks Section 1 5...
Страница 133: ...102 Computing the Cycle Time Section 2 7...
Страница 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Страница 411: ...380 Clock Section 6 8...
Страница 519: ...488 Replacing User serviceable Parts Section 10 2...
Страница 527: ...496 Standard Models Appendix A...
Страница 535: ...504 Dimensions Diagrams Appendix B...
Страница 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Страница 659: ...628 PLC Setup Appendix G...
Страница 665: ...634 Index work words 159 write protection 370...
Страница 667: ...636 Revision History...