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MELSEC-Q
8 DATA COMMUNICATION USING THE PRE-DEFINED PROTOCOL
(b) Timing for executing the UINI instruction
Communication protocol before change:
CH1 and CH2 are other than the predefined protocol mode.
Communication protocol after change:
CH1 or CH2 is the predefined protocol mode.
Sequence
program
UINI
instruction
Completion
device
OFF
Completion
status
indication
device
OFF
ON
ON When failed
When completed
One scan
Execution of UINI
END
processing
END
processing
END
processing
END
processing
OFF
ON
QJ71C24N(-R2/R4)
OFF
ON
Mode switching
signal (X6/XD)
Predefined
protocol
ready (X1D)
CH1 or CH2 is in
predefined protocol mode.
Communication not possible
Setting processing
CH1 and CH2 are not in
predefined protocol mode.
Communication protocol before change:
CH1 or CH2 is the predefined protocol mode.
Communication protocol after change:
CH1 or CH2 is the predefined protocol mode.
OFF
OFF
ON
ON
OFF
ON
ON
ON
Sequence
program
UINI
instruction
Completion
device
Completion
status
indication
device
QJ71C24N(-R2/R4)
Mode switching
signal (X6/XD)
Predefined
protocol
ready (X1D)
When failed
When completed
One scan
Execution of UINI
CH1 or CH2 is in
predefined protocol mode.
Communication not possible
Setting processing
CH1 or CH2 is in
predefined protocol mode.
END
processing
END
processing
END
processing
END
processing
Summary of Contents for MELSEC QJ71C24
Page 1: ......
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Page 103: ...3 42 3 42 MELSEC Q 3 SPECIFICATIONS MEMO ...
Page 177: ...6 33 6 33 MELSEC Q 6 DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL MEMO ...
Page 397: ...App 24 App 24 MELSEC Q APPENDIXES Connection example 3 Connection example 4 ...
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