Link Scan Time - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Link scan time

The following is the formula to calculate the link scan time. (When "Link Scan Mode" under "Supplementary Cyclic Settings" in
"Application Settings" is "Sequence Scan Asynchronous")
LS = (Np + (Ns  Ka) + Kb + Kc + Kd + Ke)  1000 + Ni  0.02 + St [ms]
Item
Np
Ns
Ka
Kb
Kc: Maximum transient processing
time
Kd: Maximum data link processing
time when the station is disconnected
from or returned to the network
Communication mode
Normal
((Total number of points of "RX/RY Setting" set in "Network Configuration
Settings" of "Basic Settings")  4 + (Total number of points of "RWw/RWr
Setting" set in "Network Configuration Settings" of "Basic Settings")  4) 
0.08
Number of actually connected slave stations
■When the master station is a
system other than a redundant
system
25.8
■When the master station is a
redundant system
58
655
160 + 60  number of slave stations
set in "Network Configuration
Settings" under "Basic Settings"
(0 when transient transmission is not
performed)
■When the firmware version of the master station is "05" or later
Number of disconnected stations  3500
■When the firmware version of the master station is "04" or earlier
9000 + Number of ports used in the switching hub  3000 (9000 when the switching hub is not used)
High-speed
■When the master station is a
system other than a redundant
system
The value changes depending on
whether "Data Link Error Station
Setting" under "I/O Maintenance
Settings" in "Application Settings" is
"Clear" or "Hold".
• When "Clear" is set: 18.5
• When "Hold" is set: 9.75
■When the master station is a
redundant system
56.1
168
80 (0 when transient transmission is not performed)
*1
High-speed remote net
((Total number of points of "RX/RY
Setting" set in "Network Configuration
Settings" of "Basic Settings")  4 +
(Total number of points of "RWw/RWr
Setting" set in "Network Configuration
Settings" of "Basic Settings")  4) 
0.03
The value changes depending on
whether "Data Link Error Station
Setting" under "I/O Maintenance
Settings" in "Application Settings" is
"Clear" or "Hold".
• When "Clear" is set: 7.2
• When "Hold" is set: 3.8
336
APPX
Appendix 7 Processing Time
A
341