Справочник Пользователя для Mitsubishi Electronics AJ65bt-r2
5 - 20
MELSEC-A
5 PRELIMINARY INFORMATION
(b) Transmission area (
R 2
14
H
to 17
H
,
R 2
18
H
to 1B
H
)
This area is used to store the data transmitted to the external device from
the master station to the R2.
When using a reading dedicated device, such as a barcode reader, the
data does not need to be transmitted, so the transmission size (
the master station to the R2.
When using a reading dedicated device, such as a barcode reader, the
data does not need to be transmitted, so the transmission size (
R 2
14
H
,
R 2
18
H
) can be set to "0".
The default transmission size is 200
H
, so the transmission side can be
reduced by setting it according to the No. of words being used.
1) Update timing (Update direction: Master station to R2)
The master station data is stored in the R2 buffer memory at the
following timing.
following timing.
•
Just after the R2 detects that the transmission request signal
(RYn0) has turned from OFF to ON.
(RYn0) has turned from OFF to ON.
R2
External device such as ID controller
1) Transmission
request ON!
request ON!
2) Transmission request
ON confirmed!
ON confirmed!
3) Transmission
data
data
Master station
Transmit after R2
detects transmis-
sion request ON!
detects transmis-
sion request ON!
3) Transmission
data
data
(c) Reception area (
R 2
1C
H
to 1F
H
)
This area is used to store the data received by the R2 from an external
device to the master station.
When writing with an ID controller, etc., and there is no need to receive
data, the transmission size (
device to the master station.
When writing with an ID controller, etc., and there is no need to receive
data, the transmission size (
R 2
1C
H
) can be set to "0".
The default transmission size is 200
H
, so the transmission side can be
reduced by setting it according to the No. of words being used.
1) Update timing (Update direction: R2 to Master station)
The master station data is stored in the R2 buffer memory at the
following timing.
following timing.
•
Just before the R2 turns ON the reception normal read request
signal (RXn2)/reception error read request signal (RXn3).
signal (RXn2)/reception error read request signal (RXn3).
R2
External device such
as ID controller or
barcode reader
as ID controller or
barcode reader
2) Reception data
Master station
3) Reception normal (error)
read request ON!
read request ON!
Transmit just before reception
normal (error) read turns ON!
normal (error) read turns ON!
1) Reception data