Chapter 6 Applied Instructions
6-263
API
Instruction code
Operand Function
1201 D SUM P
S, D
Number of bits whose states are
ON
Device
X Y M S T C HC D L SM SR E PR K 16#
“$” DF
Pulse instruction
16-bit instruction (5 steps)
32-bit instruction (5 steps)
Symbol:
S
：
Source device Word/Double word
D
：
Destination device Word/Double word
Explanation:
1. The number of bits whose values are 1 in S is stored in D.
2. When the values of the bits in the source device specified by S are 0, the zero flag SM600 is
ON.
3. Only the 32-bit instructions can use the 32-bit counter.
Example:
When X0.0 is ON, the number of bits whose values are 1 in D0 is stored in D2.
0 0 0 1 0 0 1 0 0 0
0 0 0 1
0 0
b0
b15
D0
D2
3
Additional remark:
If the device exceeds the range, the instruction is not executed, SM0 is ON, and the error code in
SR0 is 16#2003.
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