Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 81)

Operating Functions
Chapter 5
5–44
5.5.1.1 Comments on logical operators .AND.,.OR. and .XOR.
These operators perform a BIT-WISE logical function on valid
INTEGERS. This means both arguments for these operators are between 0
and 65535 (0FFFFH) inclusive. If they are not, the BASIC Module
generates a BAD ARGUMENT ERROR. All non-integer values are
truncated, not rounded. Use the following chart for bit manipulations on 16
bit values.
Hex Decimal
To set bit 0
1
2
3
4
5
6
7
10
11
12
13
14
15
16
17
.OR. VARIABLE WITH 0001H
0002H
0004H
0008H
0010H
0020H
0040H
0080H
0100H
0200H
0400H
0800H
1000H
2000H
4000H
8000H
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
Example: 10 A= A .OR. 0100H:REM SET BIT 10
To clear bit 0
1
2
3
4
5
6
7
10
11
12
13
14
15
16
17
.AND. VARIABLE WITH 0FFFEH
0FFFDH
0FFFBH
0FFF7H
0FFEFH
0FFDFH
0FFBFH
0FF7FH
0FEFFH
0FDFFH
0FBFFH
0F7FFH
0EFFFH
0DFFFH
0BFFFH
7FFFH
65534
65533
65531
65527
65519
65503
65471
65407
65279
65023
64511
63487
61439
57343
49151
32767
Example: 10 A= A .AND. 0F7FFH: REM CLR BIT 13
To clear all bits .XOR. VARIABLE WITH
ITSELF
Example: 10 A = A.XOR.A : REM CLR A
5.5.1
Dual Operand (dyadic)
Operators (continued)