Download Q Corresponding MELSECNET/H Network System Reference Manual

3 SPECIFICATIONS
MELSEC-Q
(1) Remote master station
(a)
remote I/O station
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)
[X transmission delay time (TDX)]
[Remote master station scan time (Sm) > link scan time (LS)]
TDX = (Sm + αm) 2 + Sm + TRIOR [ms]
The master station
confirms the X attached
near the end step
X
Sm
Remote master station 0
E
αm
LS
Link scan time
Sm
0
E
αm
LS
Sm
0
E
αm
LS
Sm
0
E
αm
LS
Sm
0
E
αm
Sm
0
E
LS
TRION
0: 0 step
E: END step
Remote I/O station
TDX
ON
[Remote master station scan time (Sm) < link scan time (LS)]
TDX = (Sm + αm) round up [LS/(Sm + αm)] 2 + Sm + TRIOR [ms]
The master station
confirms the X attached
near the end step
Remote master station 0
Sm
E
αm
Link scan time
0
Sm
E
αm
0
Sm
E
αm
0
Sm
LS
LS
TRION
Sm
αm
LS
TRIOR
round up
αm
0
Sm
E
αm
0
Sm
E
LS
0: 0 step
E: END step
Remote I/O station
ON
E
X
TDX
: Remote master station scan time
: Remote master station link refresh time
: Link scan time
: I/O refresh time
: Round up the decimal point of the result operation [LS/(Sm + αm)]
POINT
The same formula is used to calculate the transmission delay time (TDX)
independently of the Secured data send/receive setting.
3 - 35
3 - 35