Mitsubishi Electric MELDAS C6 Programming Manual page 290

Program example
Program to obtain the No. of D10, D11 data bits that are set to ON (1) when XB turns ON.
XB
10
8. Function Commands
DSUM, DSUMP
DSUM D10
Counter data
B31...................................................B0
D10, D11 1 1 0 0 0
The total No. of bits set
to 1 is stored in D20
Counting with DSUM command
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Coding
No. of Com-
steps mand
D20
10 LD
11 DSUM D10
15
1 0 0 0 1 0 0 0 1 1
D20
Device
XB
D20
6