Mitsubishi Electric QJ71E71-100 User Manual page 343

(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
Item
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 QJ71E71-B5 receiving request data from a personal computer and it completing reading
when the QJ71E71-B5 communicates with the personal computer in TCP/IP and reads 508-word data of a binary
code from a random access buffer (unit: ms)
13.46 + ACK processing time of the connected device (ms)
connected device
[Calculation example 2]
The time between the QJ71E71-B5 receiving request data from a personal computer and it completing writing
when the QJ71E71-B5 communicates with the personal computer in TCP/IP and writes 508-word data of a binary
code to a random access buffer (unit: ms)
16.61 + ACK processing time of the connected device (ms)
connected device
: 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
QJ71E71-100
TCP/IP UDP/IP
communications communications
Kr Kdr Kr
3.1 0.004 2.1 0.005
3.1 0.016 2.2 0.016
3.1 0.006 2.1 0.005
3.2 0.017 2.2 0.015
9.4 + (0.008 × 508) + ACK processing time of the
9.5 + (0.014 × 508) + ACK processing time of the
QJ71E71-B5, QJ71E71-B2
TCP/IP
communications
Kdr Kr Kdr
9.4 0.008
9.1 0.030
9.5 0.014
9.6 0.042
APPENDICES
A
UDP/IP
communications
Kr Kdr
6.6 0.008
6.5 0.030
6.6 0.012
6.7 0.036
341