Mitsubishi Electric FX3U SERIES - FNC 43 - SUM; Sum of Active Bits

325
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
12 Data Operation – FNC 40 to FNC 49
12.4 FNC 43 – SUM / Sum of Active Bits
11
FNC30-FNC39 Rotation and Shift
12
FNC40-FNC49 Data Operation
13
FNC50-FNC59 High-Speed Processing
14
FMC60-FNC69 Handy Instruction
15
FNC70-FNC79 External FX I/O Device
16
FNC80-FNC89 External FX Device
17
FNC100-FNC109 Data Transfer 2
18
FNC110-FNC139 Floating Point
19
FNC140-FNC149 Data Operation 2
20
FNC150-FNC159 Positioning Control
12.4 FNC 43 – SUM / Sum of Active Bits
Outline
This instruction counts the number of "1" (ON) bits in the data of a specified device.
1. Instruction format
2. Set data
3. Applicable devices
S: This function is supported only in FX3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (SUM and SUMP)
The number of bits in the ON status in is counted, and stored to .
• When all bits are OFF in , the zero flag M8020 turns ON.
Operand type Description Data type
Word device number storing the source data 16- or 32-bit binary
Word device number storing the result data 16- or 32-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b KnX KnY KnM KnS T C D R U\G V Z Modify K H E ""P
33333333 S 33333
3333333 S 33 3
DSUM
DSUMP
Mnemonic Operation Condition
P
FNC 43
SUM
D
16-bit Instruction
5 steps
SUM
SUMP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
9 steps
Continuous
Operation
Pulse (Single)
Operation
S 1 
S
D
S 1 
S
S 2 
D
D 1 S D 1 D
D 1 S
Number of bits in the
ON status in
→
S  D 
Command
input
FNC 43
SUM
S  D 
Before
execution
After
execution
S 
D 
S 
D 
K21847
K0
K21847
K9
Word data
16-bit data
0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1
0000000000000000
b0b1b2b3b4b5b6b7b8b9b10b11b12b13b14b15
0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1
b0b1b2b3b4b5b6b7b8b9b10b11b12b13b14b15
1001000000000000
123
← 4 ← 5 ← 6 ← 7 ← 8 ← 9 (Number of "1" (ON))
32 16 8 4 2 1