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Timing chart
• Data in the table specified by GPSEND command are sent, in ascending order from lower
bytes.
• While data are being sent, the sending general-purpose communication flag for the relevant
connection (Y80 - Y8F) turns ON. The flag is turned OFF when sending is completed.
• The sending result (0: normal completion, 1: abnormal completion) is saved in the general-
purpose communication sending result flag (Y70 - Y7F).
Clear to send general-
purpose communication
flag (X80 - X8F)
Sending general-purpose
communication flag
(Y80 - Y8F)
Execute GPSEND
Sending done result flag
(Y70 - Y7F)
Sending data
I/O Allocation
I/O number
Clear to send general-
X80 - X8F
purpose
communication flag
Sending general-
Y80 - Y8F
purpose
communication flag
Sending done result
Y70 - Y7F
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 targeted for communication, using UNITSEL
command immediately before GPSEND command.
•
Maintain the ON conditions for GPSEND command until sending is
completed and the sending general-purpose communication flag (Y80 - Y8F)
turns OFF.
Confirm ON
Confirm OFF
Name
When connection is ON in general-purpose communication, the flag
is ON.
Turns ON during sending data based on GPSEND command.
Turns OFF when GPSEND command is executed for the next time
following sending completion.
Reports completion result of sending data in general-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)
7.2 Sending Operation
Conditions to enable execution of
GPSEND command
Clear to send flag (X80 - X8F): ON
Sending flag (Y80 - Y8F): OFF
Sending flag (Y80 - Y8F):
During the sending process: ON
During execution of command following
sending completion: OFF
Sending done result flag (Y70 - Y7F):
Normal completion: OFF
Abnormal completion: ON
Explanation
7-5
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