Mitsubishi QJ71LP21 Reference Manual page 75

3 SPECIFICATIONS
[X transmission delay time (T
Remote master station
Link scan time
Remote I/O station
Remote master station
Link scan time
Remote I/O station
3 - 34
(1) Remote master station
(a) Cyclic transmission (X/Y/W periodic communication)
Transmission delay time of X/Y/W is the sum of the following.
• Remote master station scan time (Except for the link refreshing time)
• Remote master station link refresh time
• Link scan time
• Remote I/O station I/O refresh (X/Y) or automatic refresh (W)
Calculate the sum as shown below:
(Note that for X/Y communication time, it is necessary to add the I/O
module response delay time to the calculation)
)]
DX
[Remote master station scan time (Sm) > link scan time (LS)]
= (Sm + αm)
T
DX
Sm Sm
αm
0 E 0
LS LS
T
RION
ON
[Remote master station scan time (Sm) < link scan time (LS)]
= (Sm + αm)
T
DX
Sm Sm
αm
0 E 0
T
RION
ON
Sm : Remote master station scan time
αm
: Remote master station link refresh time
LS : Link scan time
T : I/O refresh time
RIOR
: Round up the decimal point of the result operation [LS/(Sm + αm)]
round up
POINT
The same formula is used to calculate the transmission delay time (T
independently of the Secured data send/receive setting.
remote I/O station
2 + Sm + T [ms]
RIOR
Sm Sm
αm αm
E 0 E 0 E
LS LS
T
DX
round up [LS/(Sm + αm)]
Sm Sm
αm αm
E 0 E 0
LS LS
T
DX
The master station
X
confirms the X attached
near the end step
Sm Sm
αm αm
0 E 0 E
LS
0: 0 step
E: END step
2 + Sm + T
RIOR
The master station
confirms the X attached
near the end step
Sm Sm
αm αm
E 0 E 0 E
LS
0: 0 step
E: END step
MELSEC-Q
[ms]
X
)
DX
3 - 34