Hitachi HIDIC EH-150 Applications Manual page 58

(2). Receiving area
The receiving area can be specified only by "ASR I/O Area (Connection N) Setting" in web page. The receiving
area can be defined every ASR connection. Available I/Os are WL, WM, WR, WY.
Receive area information
No. I/O Top
1 WR 0
Figure7.1.2.2 Receiving buffer and receiving area (1)
Note
- 1 connection can handle up to 1454 bytes.
- When received data size is less than designated receiving area size, the rest area is not overwritten. The
previous data is kept.
- When received data size is bigger than designated receiving data size, the excess area is omitted
automatically.
Receive area information
No. I/O Top
1 WR 0
Figure. 7.1.2.3 Receiving buffer and receiving area (2)
Receive area information
No. I/O Top
1 WR 0
Figure. 7.1.2.4 Receiving buffer and receiving area (3)
Chapter 7 Automatic Sending/Receiving function (ASR)
Receiving buffer
Size H00 DT1
10 H01 DT2
H02 DT3
H03 DT4
...
H12 DT19
H13 DT20
20 Byte
Receiving buffer
Size H00 DT1
10 H01 DT2
H02 DT3
H03 DT4
...
H0E DT15
H0F DT16
16 Byte
Receiving buffer
Size H00 DT1
10 H01 DT2
H02 DT3
H03 DT4
...
H1E DT31
H1F DT32
32 Byte
: excess data
7-3
I/O
WR0
WR1
WR2
WR3
... ...
WR9
WRA
I/O
WR0
WR1
...
WR7
... WR8
WR9
WRA
: Previous received data
I/O
WR0
WR1
WR2
WR3
... ...
WR9
WRA
Receiving area
DT2 DT1
DT4 DT3
DT6 DT5
DT8 DT7
... ...
DT18 DT17
DT20 DT19
10 Word
Receiving area
DT2 DT1
DT4 DT3
... ...
DT16 DT15
DT(n+1) DT(n)
DT(n+3) DT(n+2)
DT(n+5) DT(n+4)
10 Word
Receiving area
DT2 DT1
DT4 DT3
DT6 DT5
DT8 DT7
... ...
DT18 DT17
DT20 DT19
10 Word