NOR

Overview

The NOR node (negated OR) is a logical gate that returns true only if all of its inputs are false. It is used to ensure a condition is met only when no conflicting signals are present.

Use NOR when:

• Ensuring an action only occurs when multiple sensors are inactive.
• Detecting an "all-off" or "no-faults" state in a system.

💡 Tip

This node performs the same operation as an OR node followed by a NOT node. Using a single NOR node keeps the flow cleaner.

Inputs

Name	Type	Description
input_1..input_N	bool	Dynamic boolean input ports to be evaluated.

⚠️ Warning

All configured input ports must be connected for the node to function correctly. If an input is missing, the node will not produce an output.

Outputs

Name	Type	Description
output	bool	Returns true if all inputs are false; returns false if at least one input is true.

Parameters

Parameter	Default	Valid values	Tunable
Number of inputs	2	The whole number (integer) >= 2	❌
Ignore Nothing values as inputs	false	bool	❌
Result when no inputs have values	false	bool	❌

Number of inputs

Defines how many boolean input ports the node will provide for comparison.

Ignore Nothing values as inputs

• true: Any Nothing value type inputs are ignored.
• false: If any input is a Nothing value type, the node output is Nothing.

Result when no inputs have values

• true: When all inputs are Nothing value type, the output is true.
• false: When all inputs are Nothing value type, the output is false.

Example

Conveyor Belt Idle Detection

A conveyor belt is considered idle only if neither the belt motor is running nor a product is detected on the belt.

Configuration:

• Number of inputs: 2
• Ignore Nothing values as inputs: false
• Result when no inputs have values: false

Result: If both inputs are false, the NOR output is true, indicating the conveyor belt is idle.

Related links

Reference:

• OR — returns true if at least one input is true
• NAND — returns true if at least one input is false
• NOT — inverts boolean values
• Boolean Trigger — blocks or passes data based on an input value (trigger)