Mitsubishi QJ71LP21-25 User Manual

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MELSEC-Q
3 SPECIFICATIONS
(b) SEND/RECV/RECVS/READ/WRITE/REQ/ZNRD/ZNWR instruction
communication
The transmission delay time of instruction 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 times of instruction communication]
1) SEND (with arrival check)/READ/WRITE/REQ/ZNRD/ZNWR instruction
T
D2
= (S
T
+ α
T
+ S
R
+ α
R
) 2 + (LS 4) + LS
U
[ms]
(MAX : T
D2
= (S
T
+ α
T
+ S
R
+ α
R
) 2 + (LS 6) + LS
U
)
2) SEND - RECV arrival time
T
D3
= S
T
+ α
T
+ (LS 2) + (S
R
2) + α
R
+ LS
U
[ms]
(MAX : T
D3
= S
T
+ α
T
(LS 3) + (S
R
2) + α
R
+ LS
U
)
3) SEND - RECVS arrival time
T
D4
= S
T
+ α
T
+ (LS 2) + S
R
+ α
R
+ LS
U
[ms]
(MAX : T
D4
= S
T
+ α
T
+ (LS 3) + S
R
+ α
R
+ LS
U
)
ST : Send side scan time
SR : Receive side scan time
αT : Send side link refresh time
2
αR : Receive side link refresh time
2
LS : Link scan time
LS
U
= -1 (LS 2)
(Number of simultaneous transient requests)
(Maximum transient count)
1
Number of simultaneous transient requests : Total number of transient
requests made from stations
on the same network during
one link scan
Maximum transient count : Max. transient count during one link scan set by
supplemental settings of common parameters
1: Round up the fractional portion
2: Total number of mounted network modules

Mitsubishi QJ71LP21-25 Specifications

General

Brand	Mitsubishi
Model	QJ71LP21-25
Category	Controller
Language	English