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3. Instruction Set
3-107
Program Example 2:
1. When S is used as a word device, n = 1 ~ 4. Errors will occur if n = 0 or n > 4.
2. When n = 4, the decoded data is 2
4
= 16 bits data.
3. When X0 goes from OFF to ON, the 2
3
bits (b0 ~ b7) in D10 will be encoded and the result
will be stored in the lower 3 bits of D20 (b2 to b0). The unused bits in D20 (b15 to b3) will be
set to 0.
4. After the execution is completed, X0 is turned OFF and the data in D remains unchanged
ENCOP D10 K3D20
X0
0000 00000000 100
b15
b0
D20
1
6543
2
1
0
0 0 0 0 000010100111
b15
b0
7
D10
all be 0
Invalid data