Mitsubishi MELSEC Q Series Handbook page 49

2
SERIAL COMMUNICATION MODULE REPLACEMENT
(a) When using application instruction (FROM/TO)
Transmis-
Send Module Send
sion com-
enable ready request
plete
flag signal
Transmis-
sion com-
plete
Send completion
check flag
Receive
data read
Receive completion
check flag
Transmission processing
Writes No. of send data.
Writes send data.
Send
data
Performs send request.
Send
request
Turns OFF the send request
Send
signal upon transmission
request
completion.
(Flag control at transmission
Transmission normal
completion)
complete flag
Transmission normal
complete flag
Reception processing
Reads No. of receive data.
No.of receive
data
Transfers the No. of receive
No.of receive
data to the index register.
data
Reads received amount of data.
Receive
data
Turns ON the read complete
Receive data
signal of the receive data.
read complete
(Flag control at reception
Reception normal
completion)
complete flag
Reception normal
complete flag
2
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