AH500 Programming Manual
6-266
API
Instruction code Operand Function
1203 ENCO P
S, D, n
Encoder
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
16-bit instruction (7 steps)
Symbol:
S
：
Source device Bit/Word
D
：
Device in which the encoded values
are stored
Word
n
：
Number of bits whose values are
encoded
Word
Explanation:
1. The values of the lower 2
n
bits in the source device specified by S are encoded as the values
of the lower n bits in D.
2. If there are many bits whose values are 1 in the source device specified by S, the first bit with
the value 1 from the left is processed.
3. When S is a bit device, n is within the range between 1 and 8. When n is 8, the values of the
256 bits is encoded as the values of the 8 bits.
4. When S is a word device, n is within the range between 1 and 4. When n is 4, the values of the
16 bits is encoded as the values of the 4 bits.
5. Generally, the pulse instruction ENCOP is used.
Example 1:
1. When X0.0 is switched from OFF to ON, the instruction ENCO encodes the values of the 8 bits
in M0~M7 as the values of the lower 3 bits in D0, and the values of b15~b3 in D0 become 0.
2. After the instruction ENCO is executed and X0.0 is switched OFF, the data in D is unchanged.
b15
The values of b15~b3 in D0 become 0.
b0
D0
4 2 1
0 0 0 0 1 0 0 0
7 6 5 4 3 2 1 0
M7 M6 M5 M4 M3 M2 M1 M0
0 0 0 0 0 0 0 0 0 0 0 0 0 1 10
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