Mitsubishi Melsec-L Series User Manual page 244

(2) Minimum processing time of communications using a random access buffer
Trs = Kr + (Kdr × Df) + ACK processing time of a connected device (added only for TCP/IP communications)
• Trs
• Kr, Kdr
• Df
• ACK processing time of the
connected device
Communications using a binary code
Reading
Communications using an ASCII code
Communications using a binary code
Writing
Communications using an ASCII code
[Calculation example 1]
The time between the E71 receiving request data from a personal computer and it completing reading when the
E71 communicates with the personal computer in TCP/IP and reads 508-word data of a binary code from a
random access buffer (unit: ms)
• 2.508 + ACK processing time of the connected device (ms)
of the connected device
[Calculation example 2]
The time between the E71 receiving request data from a personal computer and it completing writing when the
E71 communicates with the personal computer in TCP/IP and writes 508-word data of a binary code to a random
access buffer (unit: ms)
• 2.8128 + ACK processing time of the connected device (ms)
of the connected device
242
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:
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Item
The time between the E71 receiving request data from a personal
computer and it completing the process (unit: ms)
Constant (Refer to the table below.)
Number of request data words
The time between a random access buffer reading/writing
completed and the connected device returning ACK
TCP/IP communications
Kr
2.0
2.0
2.0
2.0
2.0 + (0.0010 × 508) + ACK processing time
2.0 + (0.0016 × 508) + ACK processing time
LJ71E71-100
UDP/IP communications
Kdr Kr
0.0010 1.4
0.0032 1.4
0.0016 1.4
0.0056 1.4
Kdr
0.0012
0.0033
0.0018
0.0048