"fault" command

Purpose

Temporarily change a component value.

Syntax

fault partlabel=value ... 
unfault

Comments

This command quickly changes the value of a component, usually with the intention that you will not want to save it.

If you apply this command to a nonlinear or otherwise strange part, it becomes ordinary and linear until the fault is removed.

It is an error to fault a model call.

If several components have the same label, the fault value applies to all of them. (They will all have the same value.)

The unfault command restores the old values.

Example

fault R66=1k

R66 now has a value of 1k, regardless of what it was before.

unfault

Clears all faults. In this case, R66 has its old value again.

unfault can bring on surprises. Consider this sequence … V1 1 0 ac 1

C3   1   2    1u
R4   2   0    10k
fault C3=100p

C3 is 100 picofarads, for now.

modify C3=220p

C3 is 220 pf, for now. It will be restored.

modify R4=1k

R4 is 1k. It will not be restored.

unfault

C3 back to 1 uf, but R4 still 1k.

 
gnucap/manual/commands/fault.txt · Last modified: 2009/02/09 21:50 by aldavis
 
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