Mitsubishi Electric QJ71LP21 Reference Manual page 79

3 SPECIFICATIONS
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(2) Multiplexed remote master station
master station
(a) Cyclic transmission (LB/LW/LX/LY periodic communication)
The transmission delay time of B/W/Y communication is the sum of the
following:
• Scan times of multiplexed remote master station and multiplexed remote
sub-master station (Except for the link refreshing time)
• Link refresh times of multiplexed remote master station and multiplexed
remote sub-master station
• Link scan time of multiplexed remote master station
Calculate the sum as shown below:
[Transmission delay time (TD1) of B/W/Y communication]
+ α
T = S
D1 T T
+ α
(MAX : T = S
D1 T T
S : Send side scan time
T
S : Receive side scan time
R
α
: Send side link refresh time
T
α
: Receive side link refresh time
R
LS : Link scan time
1: Total time of mounted network modules
The above calculation expression holds under the following conditions.
• There are no abnormal stations.
• Transient transmission is not executed.
POINT
Under the worst conditions, use the "MAX" side calculation expression to find the
transmission delay time (T
link scan are asynchronous.
2) + α
+ (LS 0) + (S
R
2) + α
+ (LS 1) + (S
R
) of B/W/Y periodic communication, since the scan and
D1
MELSEC-Q
multiplexed remote sub-
[ms]
R
R
1
1
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