Open Contact - LD

Connection Requirements

Supported PLC Series

XPnA/1R	XPnB	XPnE	XPnF	CP3A/B/P/U CP4A~D/U	CPnE	CPnF	BP	PLC-S
✓	✓	✓	✓	✓	✓	✓	✓	✓

Supported Data Registers

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

Supported Flags

Flag	Bit	Support
Error	F11.0	-
Zero	F11.1	-
Carry	F11.2	-

Number of Steps

Steps
1

Operands

Operand	Description
S	This is the BOOL data register. This is the bit number to toggle the contact ON/OFF. When the bit is 0, the contact is OFF. When the bit is 1, the contact is ON.

Notice

Contact Orientation

The LD contact orientation behaves as follows:

• The LD contact orientation indicates the logical start by creating an ON or OFF execution condition based on the ON status of the assigned BOOL data register.
• The LD contact orientation is connected to the bus bar or at the beginning of the logic block by ANB or ORB.

Examples

• Ladder Diagram