Specifications

App - 57
Appendix 5 DEDICATED INSTRUCTIONS
Dedicated instructions are used to simplify the programming for using the functions of
the intelligent function module.
This section explains the dedicated instruction list for the Ethernet module that can be
used by the QCPU and instructions used by sequence programs in this textbook.
Appendix 5.1 Dedicated Instruction List
The following table lists the dedicated instructions for Ethernet module.
Application
Dedicated
instruction
Description Reference section
OPEN Executes the open processing of the connection. Appendix 5.2
For opening and closing connections
CLOSE Executes the close processing of the connection. Appendix 5.3
BUFSND
Transfers the data written in the fixed buffer memory to
an external device through the fixed buffer
communication.
Appendix 5.4
BUFRCV Appendix 5.5
For fixed buffer communication
BUFRCVS
Reads the received data from an external device stored
in the fixed buffer memory through the fixed buffer
communication.
(BUFRCVS: for interrupt program)
ERRCLR
Clears error information.
([COM.ERR.] LED off, Error log clear)
For reading and clearing error information
ERRRD Reads error information.
For re-initialization UINI
Executes the re-initial processing of the Ethernet
module.
(IP addresses and operation settings can be changed)
User's Manual
(Basic)
MRECV Receives e-mails.
For sending and receiving e-mails
MSEND Sends e-mails.
READ
SREAD
Reads the word devices of the other station.
(SREAD: with completed devices)
WRITE
SWRITE
Writes data to the word devices of the other station.
(SWRITE: with completed devices)
ZNRD Reads the word devices of the other station.
For reading/writing device
data
ZNWR Writes data to the word devices of the other station.
SEND Sends data to the other station.
RECV
For message (arbitrary
data) sending/receiving
RECVS
Reads receive data from the other station.
(RECVS: for the interrupt program)
Issues a remote RUN/STOP request to the other station.
For
communication
with the other
station PLC CPU
(Data link
instruction)
Remote RUN/STOP,
Reading/writing clock data
REQ
Reads/writes clock data for the other station.
User's manual
(Application)
POINT
(1) The user should not change data (control data, request data, etc.) designated
by any of the dedicated instructions until the execution of that instruction is
completed.
(2) All dedicated instructions must be executed online.
If any of the dedicated instructions is executed offline, no error will occur.
However, the execution of the dedicated instruction will not be completed.