Mitsubishi Electric Melsec Q Series User Manual page 240

APPENDIX
Programmable
controller CPU
[ READ ]
St
St
(Processing ended)
A
App - 2
(c) Response time of the CPU module on the communication request
destination station (Rt)
Find the value by the following formula.
Sequence scan time × Number of scans before executing service processing
The sequence scan time can be checked by Current scan time (SD520,
SD521).
For service processing, refer to the User's Manual (Function Explanation,
Program Fundamentals) for the CPU module used.
REMARKS
The following shows the processing flow of the items shown in the formula.
Ethernet module
(communication request
source station)
Dt
Dt
1 The receiving side Ethernet module notifies the sending side Ethernet module
of successful data reception.
(2) Setting arrival monitoring time
Set arrival monitoring time to the control data for the data link instruction.
Although the setting unit can be selected from 1s and 100ms, setting "100ms" is
1
recommended.
When "1s" is selected, the arrival monitoring time cannot be set shorter than the
TCP resend timer. To shorten arrival monitoring time, the TCP resend timer
value must be reset.
When "100ms" is selected, arrival monitoring time can be set without considering
the TCP resend timer value.
1 The "100ms" option is available for the QJ71E71-100 and LJ71E71-100 with
a serial number (first five digits) of "12062" or later.
Ethernet module
(communication request
destination station)
Command (UDP)
*1
Receive response (UDP)
Response (UDP)
Receive response (UDP) *1
MELSEC-Q/L
Programmable
controller CPU
Read request
Rt
Read data
App - 2