User guide

68 www.controltechniques.com SM-EZMotion Module User Guide
Selector.Selection sources can be tied to any destination in
the Assignments view. Figure 96 shows the four Selection
lines being assigned to Index 0 through Index 3 Initiates,
and the two Select lines being assigned to digital inputs. By
doing this, we could initiate up to four indexes with only two
Select lines and a Selector Initiate. This helps to minimize
the number of inputs required to initiate a large number of
indexes or programs.
Figure 96: Selector Assignments Example
7.4.4 Analog Inputs View
Figure 97: Analog Inputs View
Analog Inputs
The Unidrive SP has three Analog Input channels that can
be used for a wide variety of applications. These Analog
Inputs can be referred to as Analog Input 1, Analog Input
2, and Analog Input 3. By default, Analog Input 3 is
configured for thermistor mode meaning that the motor
over-temperature device is connected to Analog Input 3.
Therefore, PowerTools Pro does not have any
configuration parameters for Analog Input 3.
For more information on the Analog Inputs not covered in
this manual, please refer to the Unidrive SP User Guide
and/or the Unidrive SP Advanced User Guide.
Following are descriptions of each of the setup parameters
for Analog Input 1 and 2.
Analog Input - Channel 1
The first analog input on the Unidrive SP is a
high-resolution (16-bit) input.
Enable Channel
By default, the analog input channel is not enabled
meaning that the SM-EZMotion is not reading the A/D
value read by the analog circuit. If the channel is not
selected (disabled) the configuration parameters for the
analog input are dim and unavailable. To enable the input,
simply select the Enable Channel checkbox, and the
configuration parameters will become available to edit.
If the user wishes to control the Analog Input through other
means within the Unidrive SP, it is necessary to clear the
Enable Channel checkbox.
Module Variable
The Module Variable parameter defines what
SM-EZMotion module parameter will be controlled by
Analog Input Channel 1. This means that the selected
module parameter will automatically be populated with a
value based on the Max and Min scaling values entered on
this view.
Maximum Value
In order to scale the raw analog input value into the proper
scale and units for the selected Module Variable, the user
must define the maximum scale value and the minimum
scale value. The SM-EZMotion module then uses linear
interpolation to scale the analog input and populate the
specified Module Variable.
The Maximum Value is the value that the Module Variable
will be set to when the Analog Input reaches the specified
Maximum Input value.
Maximum Input
This defines the Maximum Input value in % that will yield
the corresponding Maximum Value for the selected Module
Variable. The Analog Input is not limited to this value, but
this is used as a point on the “curve” for the linear
interpolation equation.
Example:
If the Maximum Value is set to 5000, and the Maximum
Input is set to 100%, this means that when the Analog Input
reaches 100% of scale, the value of the selected Module
Variable will be set to 5000.
Set Maximum Input
By pressing this button, the current value of the analog
input will be read and stored in the Maximum Input text box.