Name
Data type
Description
[D+6]
Write pointer
Unsigned 16-bit
integer
The relative number from [D+7] is stored. The value is reset
to 0 when the DEFRBUF instruction is executed. The value is
incremented when data is written by the RBUFW instruction.
The value returns to 0 when the RBUFW instruction is
executed at the end of the data area.
[D+7]
Buffer data
area
Unsigned 16-bit
integer
Signed 16-bit
integer
Data is written by the RBUFW instruction.
----
[D
+7+n-1]
■
Processing
1. [n] (buffer size) is specified in [D] (buffer start).
2. The range from [D+1] (stored data amount) to [D+6] (write pointer) is cleared to zero.
Example) n=U4, D=DT0
K 1
K 0
K 2
K 3
K 4
K 5
K 6
K 7
K 8
K 9
K 10
DT1
DT2
DT3
DT0
DT4
DT5
DT6
DT7
DT8
DT9
DT10
U 4
K 0
SF 0.0
U 0
K 5
K 6
K 7
K 8
Buffer size
Stored data amount
Total
Average
Write pointer
U 0
DT1
DT2
DT3
DT0
DT4
DT5
DT6
DT7
DT8
DT9
DT10
■
Precautions for programming
● When this instruction is executed, data in the ring buffer area is not cleared. Use a data
transfer instruction or other instructions to reset the area, if necessary.
● Do not use other instructions than the RBUFW instruction to write data into the ring buffer.
The calculation of total value and moving average value are not guaranteed.
■
Flag operations
Name
Description
SR7
SR8
(ER)
To be set in the case of out-of-range in indirect access (index modification).
To be set when [n] (buffer size) is out of the available range.
To be set when the range of [D (the beginning of a buffer) + n (buffer size)] is out of the
accessible range.
8.21 DEFRBUF (Ring Buffer Definition)
8-46
WUME-FP7CPUPGR-12
Содержание FP7 Series
Страница 2: ... MEMO 2 WUME FP7CPUPGR 12 ...
Страница 18: ... MEMO xviii WUME FP7CPUPGR 12 ...
Страница 52: ... MEMO 1 34 WUME FP7CPUPGR 12 ...
Страница 61: ...Example 2 Use PSHS RDS or POPS instruction 2 1 Structure of Instructions WUME FP7CPUPGR 12 2 9 ...
Страница 104: ... MEMO 2 52 WUME FP7CPUPGR 12 ...
Страница 123: ...3 9 ANS AND stack WUME FP7CPUPGR 12 3 19 ...
Страница 125: ...3 10 ORS OR Stack WUME FP7CPUPGR 12 3 21 ...
Страница 129: ...3 11 PSHS Push stack RDS Read stack POPS Pop stack WUME FP7CPUPGR 12 3 25 ...
Страница 139: ...4 CNDE instruction 5 Step ladder instructions 6 Subroutine instructions 3 16 ALT Alternate out WUME FP7CPUPGR 12 3 35 ...
Страница 146: ... Application example of timer instructions serial connection of timers 3 17 TM Timer 3 42 WUME FP7CPUPGR 12 ...
Страница 147: ... Application example of timer instructions parallel connection of timers 3 17 TM Timer WUME FP7CPUPGR 12 3 43 ...
Страница 190: ...3 26 JP LBL Jump Label 3 86 WUME FP7CPUPGR 12 ...
Страница 239: ...Name Description SR8 ER 3 46 ST ST ST ST ST ST Data Comparison Start WUME FP7CPUPGR 12 3 135 ...
Страница 246: ... MEMO 3 142 WUME FP7CPUPGR 12 ...
Страница 251: ...Name Description SRA Depending on the comparison result SRB SRC 4 1 CMP Data Compare WUME FP7CPUPGR 12 4 5 ...
Страница 258: ... MEMO 4 12 WUME FP7CPUPGR 12 ...
Страница 277: ...F E D C B A 9 8 7 6 5 4 3 2 1 0 Digit 3 Digit 2 Digit 1 Digit 0 bit 5 8 DGT Digit Data Transfer WUME FP7CPUPGR 12 5 19 ...
Страница 304: ... MEMO 5 46 WUME FP7CPUPGR 12 ...
Страница 321: ...Name Description ER 6 7 DIVFP2 Division FP2 Compatible WUME FP7CPUPGR 12 6 17 ...
Страница 348: ... MEMO 6 44 WUME FP7CPUPGR 12 ...
Страница 388: ... MEMO 7 40 WUME FP7CPUPGR 12 ...
Страница 438: ... MEMO 8 50 WUME FP7CPUPGR 12 ...
Страница 450: ... MEMO 9 12 WUME FP7CPUPGR 12 ...
Страница 520: ... MEMO 10 70 WUME FP7CPUPGR 12 ...
Страница 602: ... MEMO 11 82 WUME FP7CPUPGR 12 ...
Страница 622: ... MEMO 12 20 WUME FP7CPUPGR 12 ...
Страница 650: ... MEMO 13 28 WUME FP7CPUPGR 12 ...
Страница 1160: ... MEMO 18 66 WUME FP7CPUPGR 12 ...
Страница 1188: ... MEMO 19 28 WUME FP7CPUPGR 12 ...
Страница 1211: ...20 4 ASCII Code Table JIS8 Code Table Reference Table ASCII Codes 20 4 ASCII Code Table JIS8 Code Table WUME FP7CPUPGR 12 20 23 ...
Страница 1220: ... MEMO WUME FP7CPUPGR 12 ...
Страница 1221: ... MEMO WUME FP7CPUPGR 12 ...