Parametric subflow

General
1

Hi all.
I'm new to NodeRED.

There is a way to define parameters for a subflow?

I'working with modbus server to simulate a machine.

I need to change a bit value in a word.
This is the path for emergency.
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Emergency is bit 0 of word at address 8000.

I need to add Emergency2 which is placed on bit 1 of word at address 8000
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So i'd like to implement a subflow with one input pin and 2 property: address and bit_pos

This the properties of subflow ChangeBit.

The property address should placed in address property of "Modbus Getter" and "Modbus Write"
The property bit should be used in change_bit function.

How can I refer to address subflow property inside a block of the subflow?

Sorry for my english.

Best regards
Mauro

2

You can do this with "environment" variables in the subflow settings. Open the subflow and click on "Edit properties" to define the required/optional variables:

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And then in the Editor panel for an instance of the subflow, you can set the values for that instance:

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