Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Program End Controllers, Nop, No operation Controllers

DVP - ES2/SA2/SS2/SA2/SX2/SE Operation Manual - Programming

Mnemonic	Function	Program steps
END	Program End	1

Controllers

ES2/EX2 SS2 SA2SE SX2

Explanations:

END instruction needs to be connected at the end of program. PLC will scan from address 0 to END instruction and return to address 0 to scan again.

Mnemonic	Function	Program steps
NOP	No operation	1

Controllers

ES2/EX2	SS2	SA2	SX2
		SE

Explanation:

NOP instruction does not conduct any operations in the program, i.e. the operation result remains the same after NOP is executed. Generally NOP is used for replacing certain instruction without altering original program length.

Program example:
Ladder Diagram:				Instruction:		Operation:
		NOP instruction will be		LD	X0	Load NO contact X0
		omitted in the ladder diagram		NOP		No operation
	X0		Y1	OUT	Y1	Drive coil Y1
		NOP

Mnemonic	Function	Program steps
NP	Negative contact to Positive contact	1

Controllers

ES2/EX2	SS2	SA2	SX2
		SE

Explanation:

When the conditions preceding NP command change from false to true, NP command (works as contact A) will be ON for a scan cycle. In the next scan cycle it turns OFF.

Program Example:
Ladder Diagram:				Instruction:		Operation:
				LD	M0	Load NO contact M0
	M0 M1		Y0	AND	M1	Connect NO contact M1 in series
		P		NP		Negative contact to Positive contact
				OUT	Y0	Drive coil Y0

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