DSUM & DSUMP

Instruction Parameters

Supported PLC Series

PLC-AES	PLC-FB	PLC-ES
✓	✓	✓

Supported Data Registers

	M	X	Y	K	L	F	T	C	S	Z	R	Q	D	@D	Constant
S	✓	✓	✓	✓	✓	✓	✓	✓	–	✓	✓	✓	✓	✓	✓
D	✓	–	✓	✓	✓	–	✓	✓	–	✓	✓	✓	✓	✓	–

Supported Flags

Flag	Bit	Support
Error	F11.0	✓
Zero	F11.1	–
Carry	F11.2	–

Number of Steps

Steps
3

Operands

Operand	Description
S	The first operand. Entries are DWORD data registers or constants. This is the data register to count set bits. The signed value range is -2,147,483,648 ~ 2,147,483,647 (232). The unsigned value range is 0 ~ 4,294,967,295 (232-1). The Hexadecimal value range is H00000000 ~ HFFFFFFFF.
D	The second operand. Entries are only WORD data registers. This represents the number of set bits found. The value will range from 0 ~ 32.

Notice

Ladder Diagram Examples

DSUM

The DSUM instruction counts the set bits, the bits equal to 1, of the DWORD value, S, and saves the amount of set bits in an assigned DWORD data register, D.

When the contact, M2.2 is ON (1), the instruction counts the set bits, all bits equal to 1, of the DWORD data register, D10. The result of the sum is saved in D13.

Memory Monitor

DSUMP

The DSUMP one-shot instruction counts the set bits, the bits equal to 1, of the DWORD value, S, and saves the amount of set bits in an assigned DWORD data register, D. Every time this instruction executes, it energizes the output only once.

When the contact, M2.3 is ON (1), the instruction counts the set bits, all bits equal to 1, of the DWORD data register, D15. The result of the sum is saved in D18.

Memory Monitor