Mitsubishi LJ61BT11 User Manual page 417

Calculation With block guarantee of cyclic data per station
value
Asynchronous mode
Normal (SM×n) + [LS×{(1×m)
value +1}]+{SL×(k+1)}
(SM×n) + [LS×{(2×m)
Max. value
+1}]+{SL×(k+1)}
Calculation With block guarantee of cyclic data per station
value
Asynchronous mode
(20×1) + [3×{(1×3)
Normal value +1}]+{10×(1+1)}
=52ms
(20×1) + [3×{(2×3)
Max. value +1}]+{10×(1+1)}
=61ms
App - 53
(2) Master station (RY)
Local station (RWr)
This indicates the time from the moment a master station CPU device turns ON
(OFF) until the corresponding local station CPU device turns ON (OFF).
Or, it indicates the time from when data is set to a master station CPU device
until the data is stored to the corresponding local station CPU device.
[Expression]
The meanings of symbols in the table are as follows:
SM : Master station sequence scan time
LS : Link scan time
SL : Local station sequence scan time
n : LS÷SM (Digits past the decimal point are rounded up to the
nearest integer.)
t : LS x m÷SM (Digits past the decimal point are rounded up to the
nearest integer.)
k : LS÷SL (Digits past the decimal point are rounded up to the nearest
integer.)
m : Constant set in the extended cyclic setting
Expanded cyclic
setting
m
Synchronous mode
{(SM×t)×1}+{SL×(k+1)}
{(SM×t)×2}+{SL×(k+1)}
Calculation example:
Master station sequence scan time of 20ms, link scan time of 3ms,
expanded cyclic setting "double", and local station sequence scan time
of 10ms
Synchronous mode
{(20×1)×1}+{10×(1+1)}
=40ms
{(20×1)×2}+{10×(1+1)}
=60ms
Local station (RX), Master station (RWw)
Single Double Quadruple
1 3
Without block guarantee of cyclic data per station
Asynchronous mode
SM+ [LS×{(1×m) +1}]+SL
SM+ [LS×{(2×m) +1}]+SL
Without block guarantee of cyclic data per station
Asynchronous mode
20+ [3×{(1×3) +1}]+10
=42ms
20+ [3×{(2×3) +1}]+10
=51ms
Octuple
7 15
Synchronous mode
{(SM×t)×1}+SL
{(SM×t)×2}+SL
Synchronous mode
{(20×1)×1}+10
=30ms
{(20×1)×2}+10
=50ms
APPENDIXES
App - 53