Context variable is reset on zero

[Steve-Mcl]

If you search the forum this exact question comes up often.

Here is one almost identical from less than a day ago...

Context is reset to default when input is 0

because of this line context.dim = context.dim || 100.0; When you set context.dim to 0, the next time it runs, it gets the 100.0 THE REASON IS... 0 == false Do this instead... if(context.dim == "undefined"){ context.dim = 100.0 //init value ONLY if its undefined } NOTE: accessing context in this manner is depreciated (see the node red documentation on context.get, context.set)