Mitsubishi MELSEC LJ71C24, User Manual

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App. - 77 App. - 77
APPENDIXES
(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 : C24 T2 = 7.0
1 This stands for the time range of processing (Tp).
[Calculation example]
The time required to process the Input instruction when receiving 100 bytes
of data using the nonprocedural protocol with C24. (Unit: ms)
• Scan time : 10 ms
10 + 0.09 100 + 7.0 26.00 (ms)
2 Indicates the time from when the C24 receives data on the line until
Reception data request (X3) turns on, when receiving 30-bytes data at
one channel.
3 When DX3 (direct mode) is used, the C24 is accessed at the time of
the instruction execution on the program. DX3 speeds up reading input
compared to X3 (refresh mode). For differences between modes, refer
to the user’s manual (function explanation, program fundamentals) of
the CPU module used.