Mitsubishi LJ61BT11 User Manual page 411

Calculation With block guarantee of cyclic data per station
value
Asynchronous mode
Normal
(SM×n)+(LS×1)+Rd
value
Max. value (SM×n)+(LS×2)+Rd
Calculation With block guarantee of cyclic data per station
value
Asynchronous mode
Normal (20×1)+(3×1)+1.5
value = 24.5ms
(20×1)+(3×2)+1.5
Max. value
= 27.5ms
App - 47
(2) Master station (RY)
This indicates the time from when the CPU device turns ON (OFF) until the
remote device station output turns ON (OFF), or the time from when data are set
to a CPU device until the corresponding data on the remote device station is
changed.
[Expression]
The meanings of symbols in the table are as follows:
SM :
LS :
n :
Rd :
Synchronous mode
(SM×n)+(LS×1)+Rd
(SM×n)+(LS×2)+Rd
Calculation example:
Master station sequence scan time of 20ms, link scan time of 3ms, and
remote device station processing time of 1.5ms
Synchronous mode
(20×1)+(3×1)+1.5
= 24.5ms
(20×1)+(3×2)+1.5
= 27.5ms
Remote device station (RY), (RWr)
Master station sequence scan time
Link scan time
LS÷SM (Digits past the decimal point are rounded up to the
nearest integer.)
Remote device station processing time
Without block guarantee of cyclic data per station
Asynchronous mode
SM+(LS×1)+Rd
SM+(LS×2)+Rd
Without block guarantee of cyclic data per station
Asynchronous mode
20+(3×1)+1.5
= 24.5ms
20+(3×2)+1.5
= 27.5ms
APPENDIXES
Synchronous mode
(SM×n)+(LS×1)+Rd
(SM×n)+(LS×2)+Rd
Synchronous mode
(20×1)+(3×1)+1.5
= 24.5ms
(20×1)+(3×2)+1.5
= 27.5ms
App - 47