Delta DVP-ES2 User Manual download pdf (Page 126)

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101

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

3-10

Mnemonic Function Program steps

END

Program End 1

Controllers

ES2/EX2 SS2

SA2

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

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:

NOP

NOP instruction will be

omitted in the ladder diagram

Instruction: Operation:

LD X0 Load NO contact X0

NOP

No operation

OUT Y1 Drive coil Y1

Mnemonic Function Program steps

Negative contact to Positive contact 1

Controllers

ES2/EX2 SS2

SA2

SX2

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:

M0 M1

Instruction: Operation:

LD M0 Load NO contact M0

AND M1 Connect NO contact M1 in series

Negative contact to Positive contact

OUT Y0 Drive coil Y0

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Delta DVP-ES2 User Manual Page 126

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