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V530-R2000
User’s Manual
SECTION 7
Host Communications
§
Using TXD Instructions
When using the TXD instruction, commands are not set in the Read Area, but are
actively sent from the PLC to the Controller.
Set
System Set./Com Mode/Read Area
to
None
.
V530-R2000
Write Area
PLC
Unit number: 00 (fixed)
Controller
Executes the command.
While the command is being executed, the BUSY output terminal
is ON.
Writes data to Write Area.
END
Returns write completed
response.
A Host Link error occurs and the ERROR output
terminal turns ON if there is no response within 5
seconds. It is assumed that the line is broken or
the PLC is not working correctly.
An error message is displayed on the screen.
Send command using a TXD instruction.
Set the number bytes of
send data to 3 bytes.
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