Eaton ELC-PB, Programming Manual

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3 . I n s t r u c t i o n S e t
M N050 03003E F or mo re infor ma tio n vi sit:
w w w. e a t o n . c o m
3-99
API Mnemonic Operands Function
43 D SUM P
S, D
Sum of ON bits
Bit Devices Word devices Program Steps
Type
OP
X Y M S K H KnX KnY KnM KnS T C D E F
S * * * * * * * * * * *
D * * * * *
SUM, DSUMP: 5 steps
DSUM, DSUMP: 9 steps
ELC ELCB ELCM
PB PC/PA/PH PV PB PH/PA
32 16 P 32 16 P 32 16 P 32 16 P 32 16 P
Operands:
S
: Source address
D
: Destination address stores number of ON bits
Description:
1. If the contents of the16 bit source are all “0”, the “Zero” flag, M1020=ON.
2.
D
will occupy two registers when using as a 32-bit instruction.
3. If operands
S
,
D
use index register F, it is only available as a 16-bit instruction.
4. If no bits are ON then the zero flag, M1020 is set.
Program Example:
When X20 =ON, all the bits that = “1” in D0 will be counted and the number stored in D2.
X20
SUM D0 D2
0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 3
D2 D0