Mitsubishi Electric MELSEC-L SERIES Basic User Manual page 308

(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
Communications using a binary code
Batch reading
Communications using an ASCII code
Communications using a binary code
Batch writing
Communications using an ASCII code
*1 The time from when the E71 receives the request data from the personal computer until it completes the process is
shown below.
306
The time between the E71 receiving request data from a personal computer and it completing
the process
*1
(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
• Own station access: E71-connected station scan time
• Another station access over MELSECNET/10: Transmission delay time + E71-connected
station scan time
Item
Connected device
(personal computer)
Command
message
E71
Step 0
CPU module scan time
TCP/IP communications
Ke Kdt
3.3 0.0022
3.3 0.0046
3.3 0.0024
3.3 0.0073
ACK Response
(TCP only) message
Step 0
END
Tfs
LJ71E71-100
UDP/IP communications
Ke
2.6 0.0018
2.7 0.0046
2.6 0.0033
2.7 0.0070
ACK
(TCP only)
END
Kdt