ABM1 block

Hi there,



I'm trying to use one ABM1 block, and with the expression represent the load of my circuit.

How to put for example one expression of this kind:

T0-3ms=7(1+3x)

T3-25ms=28(1+5x) ?
Until 3ms the load behave with one expression then until 25ms behaves differently.

I can put both expression but how can I define the time using?


Thanks in advance

Rudi