IO425 - Setup
IO425 - Setup — Configure the IO425
LVDT/RVDT/Resolver emulation block
Library
Simulink Real-Time - Speedgoat
Description
Your model can contain only one Setup block
for each I/O module in your target machine.
Ports
This driver block has no input or output ports.
Parameters
Main Tab
-
Module ID
The Module ID has two functions:
It defines the logical connection between the Setup block and its I/O
blocks
It also informs the auto-search feature of the PCI Slot parameter. If
only one I/O module of this type is installed, the Module ID must be set
to 1. If n modules are installed, it
must be in the range 1:n. Not all the I/O modules installed in the
target machine need to be used. To see how each I/O module maps to a
Module ID, use this Speedgoat API:
speedgoat.getIoInterfaces("TargetName", "mySpeedgoat")
-
PCI Slot (-1: auto-search)
There are two approaches for mapping this block to a specific I/O module installed
in your target machine. All modules of the same type must be configured using the
same method.
Auto-Search: with the default value -1 the I/O module will be automatically located in the
target machine. If you have multiple modules of the same kind, the
Module ID defines which module is associated with this block. To see how
each I/O module maps to a Module ID, use this Speedgoat API:
speedgoat.getIoInterfaces("TargetName", "mySpeedgoat")
Explicit Addressing: to explicitly define the logical address of the
I/O module in the target machine, you can provide the PCI bus and slot
numbers as a vector: [bus, slot]. To determine these numbers, run the
following command in the MATLAB command window:
speedgoat.getIoInterfaces("TargetName", "mySpeedgoat", "Advanced", true)Note
that the PCI address can change whenever an I/O module is added or
removed – usually, auto-search is the best option.
-
Channel Setup
Select the operation mode for each channel. The IO425 supports up to 4
channels. Available options:
General Tab
-
Output Voltage
Select the maximum output voltage for each channel.
![[Note]](images/note.png) | Note |
|---|
The minimum and maximum output voltage depends on the
installed I/O interfaces. The output voltage follows the applied
excitation input signal and therefore reflects all the glitches
and noise. Note that the output will always be exactly one cycle
behind the input signal. |
-
Phase Offset A
Specify the phase offset (0° to 360°) between the input signal and
output A.
-
Phase Offset B
Specify the phase offset (0° to 360°) between the input signal and
output B.
-
Invert Output A
Select if the output A signal should be inverted (phase shift of
180°).
-
Invert Output B
Select if the output B signal should be inverted (phase shift of
180°).
-
Mode
Select if an internal or an external excitation signal should be used.
| Note |
|---|
Connect the external excitation signal before loading the
model on the real-time target machine. This is important because
the I/O module automatically calibrates itself to the signal
applied during model load in order to achieve maximum sampling
resolution without clipping. If no input signal is applied during model load, select the
Enable Manual Input
Calibration
checkbox. |
-
Frequency
Specify the excitation frequency if an internal excitation is
used.
-
Sample Buffer Size
Specify the sample buffer size if an external excitation is used. The
module averages the input signal measured over the specified number of
samples to calculate the input frequency. A higher number will give a
more stable frequency measurement but changes in the input will be
reflected at the output with a higher delay. The buffer size is a
trade-off between speed and stability.
As a guide, increase or decrease the number of samples until the
measured frequency remains stable, then use the lowest number of
samples.
-
Enable Manual Input Calibration
This setting can be used if the external excitation signal is not
present at the input when loading the model on the real-time target
machine.
-
Input Gain
Specify the gain (0 to 255) for the excitation input signal. The
optimal value can be determined by reading the system log when the
manual input calibration is disabled and the excitation signal is
present at the input.
LVDT/RVDT Tab
- Initial Position
Define the initial position (-100 to 100) present on the outputs after
the application has been downloaded. The values can be set individually
by entering a vector: the value at a certain position in the Initial
Values vector is applied to the channel as defined in the Channel
Setup.
- Reset to Initial Values
Define whether the initial values are also applied once the
application has stopped. The behavior can be set individually for each
channel using a vector. "1" means use the Initial
Position vector and "0" means keep the latest
value.
- Null Offset
At the extremes (-100 % or +100 %), an offset can be added to define
the minimum output voltage instead of zero. This does not change the
maximum output voltage, it just applies a positive offset to the lower
voltage. The null offset is only available for the 4-wire mode.
Resolver Tab
- Initial Position
Define the initial position (0° to 360°) present on the outputs after
the application has been downloaded. The values can be set individually
by entering a vector: the value at a certain position in the Initial Position vector is applied to the
channel as defined in the Channel Setup.
- Reset to Initial Values
Define whether the initial values are also applied once the
application has stopped. The behavior can be set individually for each
channel using a vector. "1" means use the Initial
Position vector and "0" means keep the latest
value.