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App. - 15 App. - 15
MELSEC-Q
APPENDIX
(b) Input instruction
Tp = Sr + 0.09
Dr + T2
Tp (
1) : Time from the start of execution of the Input instruction to the
End processing of the sequence scan at the completion of
the Input instruction execution (ms)
Sr : Scan time
Dr : Number of bytes of reception data
T2 : QJ71C24N (-R2/R4) T2 = 7.0
QJ71C24 (-R2) T2 = 14.91
1 This stands for the time range of processing (Tp).
Sequence program
Reception data read
request (X3)
Input instruction
Input instruction
complete device
Step 0 END
Tp
1 scan
Q series C24 side
External device side
Start of the Input
instruction execution
the Input instruction execution
(DX3)
Start of the End processing of
the scan at the completion of
INPUT
2ms ( 2)
Reception data
[Calculation example]
Estimate the time required to process the Input instruction when receiving
100 bytes of data using the non procedure protocol with the QJ71C24N.
(Unit: ms)
• Scan time : 10 ms
10 + 0.09
100 + 7.0 26.00 (ms)
2 When only using CH1 of the Q series C24 and when processing only
30 bytes of data received, the time until the reception data read request
(X3) comes on is displayed after the Q series C24 receives data from
the network.