Emerson EZMotion - Analog Output - Channel 2

126 EZMotion User/Programming Guide
www.controltechniques.com Revision: A8
Example:
If the Maximum Value is set to 5000, and the Maximum Output is set to 100%, the Analog Output will be at full scale when the
selected Module Parameter is equal to 5000.
Minimum Value
This defines the Minimum Value of the Source parameter that will yield the corresponding Minimum Output for the Analog Output.
The source parameter may be less than this minimum value, however the Min Value and Min Output are used together to define a
single point on the curve used for linear interpolation.
Minimum Output
In order to scale the Analog Output 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. EZMotion then uses linear interpolation to determine the value to be sent to the
analog output.The Minimum Output is the value that will be sent to the Analog Output when the Module Variable is equal to the
Minimum Value.
Example:
If the Minimum Value is set to -5000, and the Minimum Output is set to 15%, the Analog Output will be at 15% of full scale when the
selected Module Parameter is equal to -5000.
Output Mode
The Analog Outputs on the Unidrive SP/Digitax ST support four different modes of operation to provide a very flexible solution to
nearly any application. The four modes of operation are described below.
1. 0 –20 mA Mode – In this mode, the analog output channel will send out a current signal ranging from 0 mAmps
(minimum scale) to 20 mAmps (full scale).
2. 4-20 mA Mode – In this mode, the analog output channel will send out a current signal ranging from 4 mAmps
(minimum scale) to 20 mAmps (full scale).
3. High Speed Mode – In this mode, the analog output channel will send out a voltage signal ranging from 0 Volts
(minimum scale) to 9.8 Volts (full scale). The user scaling parameters are ignored when High Speed Mode is selected,
and the scaling is as follows:
For more information on the High Speed Mode scaling, please refer to the Unidrive SP Advanced User Guide or the Digitax ST User
Guide.
4. Voltage Mode – In this mode, the Analog Output channel will send out a voltage signal ranging from 0 Volts (minimum
scale) to 10.0 Volts (full scale).
8.6.9 Analog Output – Channel 2
See Analog Output – Channel 1.
Output Source Hard Coded Scaling
3.02 – Speed 9.8V = Speed_Freq_Max
4.02 - Active Current 9.8V = Rated Drive Current / 0.45
4.17 – Reactive Current 9.8V = Rated Drive Current / 0.45
5.03 – Output Power
9.8V when:
Active Current = Rated Drive Current / 0.45
Voltage in phase with the active current = DC_VOLTAGE_MAX