Mitsubishi Melsec-L Series User Manual page 168

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(2) Procedure for clearing the reception data by the dedicated
instruction "CSET"
This instruction clears the reception data up to the present without interrupting
the data transmission processing.
(Procedure for clearing) ··· In the case of the CH1 side interface
1) Execute the CSET instruction
If the CSET instruction is executed while the reception data read request
(X3/XA) or reception abnormal detection signal (X4/XB) is turned on, the
CSET instruction is kept waiting until the signal is turned off.
2) The receive data clear processing is executed to the OS area of the C24
(Refer to Section 10.1.2).
The following is a program example of clearing the reception data by the
dedicated instruction "CSET."
10 DATA COMMUNICATION USING THE NONPROCEDURAL PROTOCOL
Set the execution type
Set the request type
(Receive data clear)
Execute the receive
data clear
Normal completion
Abnormal completion
Reset the complete flag by
external command
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