Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 237

7 APPLICATION FUNCTIONS
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(b) When "Fixed term cycle interval (Maximum no. of transients: 2)" and
"System times (Maximum no. of transients: 2)" are set
Low-speed cyclic
transmission
M 1 sending
P
N 2 sending
S
N 3 sending
S
N 4 sending
S
(3) Link cycle
Link cycle examples of the low-speed transmission are as shown below.
(a) When "Transmit data of one station in 1 link scan" is set
Transmission processing
interval in (2)
(b) When "Fixed term cycle interval setting" is set
Transmission processing
interval in (2)
(c) When "System times" is set
Transmission processing
interval in (2)
Specified time
M N N N
P S S S
1 2 3 4
LB LB LB
/ / /
LW LW LW
LB LB
/ /
LW LW
LB LB
/
LW LW
LB
/
LW
Normal Normal
link scan link scan
Transmission processing interval
Normal
link scan
Link cycle
Waiting time
Link cycle (Fixed time interval)
/
LB
/
LW
MELSEC-Q
7 - 13