Table of Contents
Advertisement
Timing chart
Clear to send master
communication flag
(X90 - X9F)
Sending master
communication flag
(Y90 - Y9F)
Execute RECV
Master communication
Sending done result flag
(Y70 - Y7F)
Sending data
Response reception
processing
I/O Allocation
I/O number
Clear to send master
X90 - X9F
communication flag
Sending master
Y90 - Y9F
communication flag
Y70 - Y7F
Sending done result flag
(Note 1) Each contact is used for reading the operation status. Do not write over it with a user program.
KEY POINTS
Specify the connection No. targeted for communication, using UNITSEL
•
command immediately before SEND/RECV command.
•
Master communication is only valid when MEWTOCOL or MODBUS is
selected. Confirm that the "clear to send master communication flag" (X90 -
X9F) for the targeted connection is ON,, and execute SEND/RECV command.
•
You cannot execute other SEND/RECV command for connection in master
communication. Confirm that the "sending master communication flag"
(Y90 - Y9F) is OFF, and execute command.
•
You cannot execute SEND/RECV command for connection in slave
communication.
•
Up to 16 SEND/RECV commands can be executed simultaneously for
different connections.
•
In the case of communication between FP7 LAN ports, specify "U1" for the
partner station no. The receiver is specified by IP address.
Confirm ON
Confirm OFF
Name
When connection is ON in the master communication mode, the
flag is ON.
Turns ON during sending data based on SEND/RECV command.
Turns OFF when ED command is executed following response
reception processing.
Reports completion result of sending data in general-purpose
communication or master communication. (Normal completion: 0,
Abnormal completion: 1)
5.3 MEWTOCOL Master Communication (RECV)
Explanation
Conditions to enable execution of RECV
command
Clear to send flag (X90 - X9F): ON
Sending flag (Y90 - Y9F): OFF
Sending flag (Y90 - Y9F):
During the sending process: ON
During execution of ED command
following response reception processing:
OFF
Sending done result flag (Y70 - Y7F):
Normal completion: OFF
Abnormal completion: ON
5-5
Advertisement
Table of Contents
