Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Orb Anb, Tmr, 2 LD / LDI Load no contact / Load NC contact

1. PLC Concepts

Execution order of the sample program:

1	LD	X0
2	OR	M0
3	AND	X1
4	LD	X3
	AND	M1
	ORB
5	LD	Y1
	AND	X4
6	LD	T0
	AND	M3
	ORB

7ANB

8OUT Y1

TMR T0 K10

1.5.2 LD / LDI (Load NO contact / Load NC contact)

LD or LDI starts a row or block

LD instruction LD instruction

AND block OR block

1.5.3 LDP / LDF (Load Rising edge trigger/ Load Falling edge trigger)

Similar to LD instruction, LDP and LDF instructions only act at the rising edge or falling edge when the contact is ON, as shown in the figure below.

Rising-edge

X0 X0

Time

OFF ON OFF

Falling-edge

Time

OFF ON OFF

1.5.4 AND / ANI (Connect NO contact in series / Connect NC contact in series)

AND (ANI) instruction connects a NO (NC) contact in series with another device or block.

AND instruction AND instruction

1.5.5 ANDP / ANDF (Connect Rising edge in series/ Connect Falling edge in series)

Similar to AND instruction, ANDP (ANDF) instruction connects rising (falling) edge triggers in series with another device or block.

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