Mitsubishi Electric QJ71E71-100 User Manual page 344

(3) Minimum processing time of MC protocol communications (batch reading and
batch writing)
Tfs = Ke + (Kdt × Df) + Scr × number of scans required for the process + ACK processing time of the connected
device
• Tfs
• Ke, Kdt
• Df
• Scr
Item
Communications using a binary code
Batch
Communications using an ASCII
reading
code
Communications using a binary code
Batch
Communications using an ASCII
writing
code
*1 The time from when the E71 receives the request data from the personal computer until it completes the process is
shown below.
*2 When data is sent through the tracking cable of a redundant system, add the tracking transfer time. For data transfer
time of when the tracking cable is used, refer to the following.
QnPRHCPU User's Manual (Redundant System)
342
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 + number of response data words (Application data
part)
: CPU module processing time
(a) When the target station is the QCPU
• Own station access: E71-mounted station scan time
• Another station access over MELSECNET/10: Transmission delay time +
E71-mounted station scan time
(b) When the target station is in a redundant system and data is sent through a
tracking cable
• Own station access: Control system CPU module scan time + tracking transfer
time
• Another station access over MELSECNET/10: Transmission delay time + control
system CPU module scan time + tracking transfer time
communications
Ke
14
18
14
16
Connected device
(personal computer)
Command
message
E71
Step 0
CPU module scan time
*1
*2
QJ71E71-100
TCP/IP UDP/IP
communications
Kdt Ke Kdt
0.009 13 0.008
0.015 13 0.017
0.009 13 0.008
0.027 14 0.027
ACK Response
(TCP only) message
END
Tfs
QJ71E71-B5, QJ71E71-B2
TCP/IP
communications
Ke Kdt
21 0.012
23 0.020
21 0.020
22 0.037
ACK
(TCP only)
Step 0
END
UDP/IP
communications
Ke Kdt
19 0.011
18 0.020
19 0.013
20 0.033