Mitsubishi LJ61BT11 User Manual page 416

Appendix 4.6 Transmission delay time of master station
slave station)
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
+1}]+{10×(1+1)}
value
=52ms
(20×1) + [3×{(2×3)
Max. value +1}]+{10×(1+1)}
=61ms
App - 52
(1) Master station (RX)
Local station (RWw)
This indicates the time from the moment a local station CPU device turns ON
(OFF) until the corresponding master station CPU device turns ON (OFF).
Or, it indicates the time from when data is set to a local station CPU device until
the data is stored to the corresponding master 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)×2}+{SL×(k+1)}
{(SM×t)×3}+{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)×2}+{10×(1+1)}
=60ms
{(20×1)×3}+{10×(1+1)}
=80ms
local station (Ver.2 compatible
Local station (RY), Master station (RWr)
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
=41ms
20+ [3×{(2×3) +1}]+10
=51ms
Octuple
7 15
Synchronous mode
(SM×t)×2
(SM×t)×3
Synchronous mode
(20×1)×2
=40ms
(20×1)×3
=60ms
APPENDIXES
App - 52