Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 197)

5.7 Data Shift Instructions
5.7.9 Binary Search (BSRCH)
5-128
5.7.9 Binary Search (BSRCH)
( 1 ) Operation
The BSRCH instruction searches for the search data using a binary search method in the area designated by the number
of words from the first address in the search range. The search result is output as the offset word number of the data that
matches the search data from the first register in the search range.
∗ 1. Always sort the search area in ascending order before executing the BSRCH instruction.
∗ 2. The conceptual diagram shown here is for integers. The instruction operates in the same way for double-length
integers and real numbers.
∗ 3. If the search data is not found, the instruction sets the search result to -1.
( 2 ) Format
∗ C and # registers cannot be used.
4
First register address
in the search range
7
8
20
60
MW†††††
MW††††† + 1
MW††††† + 2
MW††††† + 3
MW††††† + 4
Search data:
20
4
First register address
in the search range
7
8
20
60
Found at address + 3 from
the first address
in the search range.
Search result: 3 (offset)
Number of
words in
range
Search data Search result
Number of words
in range
First address
of the search range
Icon:
Key entry: BSRCH
Parameter Name
Applicable Data Types
B W L F A Index Constant
First address of search
range (Src)
× { { { × × ×
Number of words in range
(Width)
× { × × × { {
Search data (Data) × { { { × { {
Search result (Result) × { * × × × × ×