Mitsubishi Electric MELSEC-Q Series User Manual page 377

(3) Master station ↔ remote device station (Ver.2-compatible slave station)
(a) Master station (RX)  remote device station (RX) (RWr)
This is the time between a signal input to a remote device station and the device of a CPU module turning on
(off) or the time until the data in the device of a CPU module is changed.
[Formula]
The letters in the table mean as follows.
SM: Master station sequence scan time
LS: Link scan time
LS SM (The decimal point is rounded up.)
n:
LS × m SM (The decimal point is rounded up.)
t:
Rd: Remote device station processing time
m: Constant according to the extended cyclic setting
Expanded Cyclic Setting
With block guarantee of cyclic data per station
Calculation
value
Asynchronous mode
(SM × n) + (LS × 1 × m) +
Normal value
Rd
(SM × n) + (LS × 2 × m) +
Max. value
Rd
When master station sequence scan time is 20ms, link scan time is 3ms, and the expanded cyclic setting
Ex.
is "Double"
With block guarantee of cyclic data per station
Calculation
value
Asynchronous mode
(20 × 1) + (3 × 1 × 3) + 1.5
Normal value
= 30.5ms
(20 × 1) + (3 × 2 × 3) + 1.5
Max. value
= 39.5ms
Single
m
Synchronous mode
{(SM × t) × 1} + Rd
{(SM × t) × 2} + Rd
Synchronous mode
{(20 × 1) × 1} + 1.5
= 21.5ms
{(20 × 1) × 2} + 1.5
= 41.5ms
Double
1 3
Without block guarantee of cyclic data per station
Asynchronous mode
SM + (LS × 1 × m) + Rd
SM + (LS × 2 × m) + Rd
Without block guarantee of cyclic data per station
Asynchronous mode
20 + (3 × 1 × 3) + 1.5
= 30.5ms
20 + (3 × 2 × 3) + 1.5
= 39.5ms
APPENDICES
Quadruple Octuple
7 15
Synchronous mode
{(SM × t) × 1} + Rd
{(SM × t) × 2} + Rd
Synchronous mode
{(20 × 1) × 1} + 1.5
= 21.5ms
{(20 × 1) × 2} + 1.5
= 41.5ms
375
A