Mitsubishi Electric MELSEC-Q Series User Manual page 375

(2) Master station ↔ remote device station (Ver.1-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:
Rd: Remote device station processing time
With block guarantee of cyclic data per station
Calculation
value
Asynchronous mode
Normal value (SM × n) + (LS × 1) + Rd
Max. value (SM × n) + (LS × 2) + Rd
When master station sequence scan time is 20ms, link scan time is 3ms, and remote device station
Ex.
processing time is 1.5ms
With block guarantee of cyclic data per station
Calculation
value
Asynchronous mode
(20 × 1) + (3 × 1) + 1.5
Normal value
= 24.5ms
(20 × 1) + (3 × 2) + 1.5
Max. value
= 27.5ms
Without block guarantee of cyclic data per station
Synchronous mode
{(SM × n) × 1} + Rd SM + (LS × 1) + Rd
{(SM × n) × 2} + Rd SM + (LS × 2) + Rd
Without block guarantee of cyclic data per station
Synchronous mode
{(20 × 1) × 1} + 1.5 20 + (3 × 1) + 1.5
= 21.5ms = 24.5ms
{(20 × 1) × 2} + 1.5 20 + (3 × 2) + 1.5
= 41.5ms = 27.5ms
Asynchronous mode
{(SM × n) × 1} + Rd
{(SM × n) × 2} + Rd
Asynchronous mode
{(20 × 1) × 1} + 1.5
= 21.5ms
{(20 × 1) × 2} + 1.5
= 41.5ms
APPENDICES
Synchronous mode
Synchronous mode
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