IO92X,IO970-IO973 Resistor Control / IO92X,IO970-IO973 / Resistors / I/O Connectivity / Speedgoat I/O Blockset

Library

Simulink Real-Time - Speedgoat

Description

The driver block used for configuring the driver is described in the following sections.

Ports

Inputs

R n (n is the resistor channel number): The requested resistance value. The number of these ports is dependent on the channel count, which is specified by the 'Channels vector' parameter.
RAn: The requested resistance between the 'CHn Terminal A' and the 'CHn Wiper' IO pins. Only available for IO923 and IO924 potentiometer modules.
RBn: The requested resistance between the 'CHn Terminal B' and the 'CHn Wiper' IO pins. Only available for IO923 and IO924 potentiometer modules.

The output ports are only shown when the option "Show output ports" is enabled.

Outputs

R n (n is the resistor channel number): The value that the driver is trying to assign to the resistor. This value may differ slightly from the input value and the actual value of the resistor. The number of these ports is dependent on the channel count, which is specified by the 'Channels vector' parameter.
RAn: The value that the driver is assigning to the resistor between the 'CHn Terminal A' and the 'CHn Wiper' IO pins. This value may differ slightly from the input value and the actual value of the resistor. Only available for IO923 and IO924 potentiometer modules.
RBn: The requested resistance between the 'CHn Terminal B' and the 'CHn Wiper' IO pins. Only available for IO923 and IO924 potentiometer modules.

Parameters

IO92x, IO97x module ID

If your target machine only contains one I/O module, leave the default value (1). If more than one I/O module of this type is present, select a unique number (1-255) for each of your modules.

IO92x, IO97x module type

Select the specific type of I/O module this driver block is being used with.

Channel vector

This parameter allows the enabling of individual resistors channels in any order. The parameter takes values (starting from 1) in a row vector. The number of elements defines the number of resistors used. e.g. to use two resistor channels enter [1, 2].

Initial value vector

The initial resistor impedance in Ohms. A scalar value or a vector of the same length as the 'Channel vector' can be entered. If a scalar value is specified, this value is applied to all resistors. For potentiometers there are two resistors per channel, so the vector size must be twice the size of the channel vector. The sequence is RA1, RB1, RA2, RB2, etc. The resistors are set to their initial values between the time the model is downloaded and the time it is started. Before the model is downloaded, all resistors are in an "open circuit" state. To maintain this state, use a value of 100e6 or more. Potentiometers and High Density Resistors do not support "open circuit". They are initialized to the highest possible resistance which they support.

Reset vector

The reset vector controls the behavior of the resistors at model termination. A scalar value or a vector of the same length as the 'Channel vector' should be entered. If a scalar value is specified, this value is applied to all resistors. If a value of 1 is entered, the corresponding channel will be reset to the state specified in the 'Initial value vector'. If a value of 0 is entered, the channel remains at the last state attained while the model was running.

Show output port(s)

Enables or disables the output port(s).

Sample Time

Defines the base sample time at which this driver block gets its sample hit. This parameter can also be set to -1 for inherited sample time. The units are in seconds.

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 type, you must use explicit addressing.
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.

Documentation