TPT User's Guide - PikeTec

TPT User's Guide Page 27
5.2 Defining Equations
add channel
Definition equation
Signal editor window
Figure 14: Modelling by means of "direct definitions"
Before the equations of a testlet of type “direct definition” can be entered, at least one scenario
must be associated with the testlet. If no scenario is defined for the testlet, please create one
(see Definition of Scenarios). Additionally, the signature of the testlet should contain at least
one stimulation channel or local channel (see section 133: Signature of a Testlet).
To enter the equations of a scenario, select the scenario in the scenario browser. The “content”
tab will then display the table of equations for that scenario (see section 5: Modelling a Testlet
by “Direct Definition”).
Signals, which you want to assign to a channel, can also be modelled with the signal editor (see Defining
signals).
A function wizard exists to aid the channel definitions (cf. section 13).
When entering an expression, Ctrl+Space opens a popup that lists all channels that are available to
the expression. Using the Enter key on a channel will import it into the expression at the current cursor
position.
5.3 Changing the order of definition equations
The equations are evaluated in from top to bottom, thus the order is relevant. They may be
moved by drag and drop the channel to the new position. (see Figure 14).
In former versions of TPT it was possible to change the order of definition equations within the testlet for
every scenario individually. This is not possible anymore in the release 3.1 and may change the semantics
of former versions of TPT-files. These direct definitions must be checked manually in order to avoid
unexpected behavior when executing earlier versions of TPT-files with TPT 3.1 and higher.