Mitsubishi Electronics AJ65bt-r2 ユーザーズマニュアル
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MELSEC-A
3 SPECIFICATIONS
3.9 Transmission/reception time
The transmission/reception time is shown below.
3.9.1 When using buffer memory automatic update function
The transmission time is the time from when the transmission request (RYn0) turns ON
to when the R2 turns the transmission normal complete (RXn0) ON.
The reception time is the time from when the R2 starts receiving the data to when the
reception normal read request (RXn2) and reception error read request (RXn3) are
turned ON by the R2.
(1) Calculation expressions
Details
Calculation expression (unit: ms)
Transmission time
SM
×
2 + LS
×
6 + RS + data transmission time *
1
+ request/response
scan time of area to be updated at transmission *
2
When the master station
is the A/QnA Series
Reception time
SM + LS
×
3 + RS + data reception time *
1
+ request/response scan
time of area to be updated at reception *
2
Transmission time
SM
×
2 + LS
×
4 + RS + data transmission time *
1
+ request/response
scan time of area to be updated at transmission *
2
When the master station
is the Q Series
Reception time
SM + LS
×
2 + RS + data reception time *
1
+ request/response scan
time of area to be updated at reception *
2
SM
:
Master station sequence program's scan time
LS
:
Link scan time (Refer to Master Module User's Manual.)
RS
:
R2 internal processing time (Refer to section 3.8 (1).)
*1
Data transmission (reception) time
This time is obtained with the data size and RS-232-C transmission speed.
(Example) Data size: 200 bytes, Transmission speed: 9600bps (data bit length:
8, stop bit length: 1, parity bit: even)
200 × 10/9600 = 0.208s
*2
Request/response scan of area to be updated at transmission (reception)
This is the response/request scan of each area automatically updated during
transmission (reception).
With the default value for transmission, the status storage area and transmission
area 1 and 2 are updated. With the reception default value, the status storage
area and reception area are updated.
<Request/response scan of area where data is written from master station to R2>
(Size of data to be automatically updated + 16)/72 × LS [ms]
Decimal point rounded up
(Size of data to be automatically updated + 16)/72 × LS [ms]
Decimal point rounded up
<Request/response scan of area where data is written from R2 to master station>
(Size of data to be automatically updated + 16)/16 × LS [ms]
Decimal point rounded up
(Size of data to be automatically updated + 16)/16 × LS [ms]
Decimal point rounded up