IO112 - Setup
IO112 - Setup —
Configure the IO112 input/output blocks
Simulink Real-Time - Speedgoat
Your model can contain only one Setup block
for each I/O module in your target machine.
The Setup block dialog box allows all the supported I/O types of this module to be
configured, and therefore impacts on the analog input driver block.
This driver block has no input or output ports.
This control selects a configuration section, the parameters of which
are then shown in the dialog box below the Parameter Group field. Possible groups are:
Analog input setup
Parameter Group: Module setup
A unique module ID must be used for each type of I/O module Setup block in your
The module ID has two functions:
It defines the logical connection to link the I/O module driver blocks
with each other
It also has an impact on the PCI slot auto-search feature: if only one
I/O module is installed, the module ID must be set to 1. If multiple modules are installed, it must
be in the range 1:n. Not all the I/O modules installed in the target
machine need be used
Check this box if the I/O module should calibrate itself the next time
this model (target application) is downloaded and initialized. The
autocalibration function compensates for component aging and minimizes
the effects of temperature on accuracy. We recommend keeping this
enabled. The calibration normally takes approximately 2 seconds, so we
recommend increasing the host-target communication time-out in the model
configuration parameters to allow for this. The status of the
calibration is displayed on the target screen. The calibration is not
re-executed during normal start/stop operation once the target
application has been downloaded. All input channels are calibrated to a
single internal voltage reference. Offset and gain error corrections for
each channel are determined during the autocalibration process and are
applied to each channel in real time during data acquisition.
Select either Initiator (default) or
Target. If your real-time target
machine contains a single IO112 I/O module, then Initiator must be selected.
If Initiator is selected, A/D
conversions are initiated by this I/O module and the I/O module outputs
a pulse train to optionally trigger other IO112 I/O modules which have
Inter-Module Synchronization set to
Target. The pulse train is sent on
I/O connector pin B38 (ground is on pin B37).
If Target is selected, the I/O module
itself does not start its A/D conversions, but rather triggers them
using a pulse train from another IO112 I/O module which has Inter-Module Synchronization set to Initiator. The pulse train is received on pin
B38 (ground is on pin B37). With this setting there must be at least one
other IO112 I/O module present with the Inter-Module Synchronization field set to Initiator, and the modules' B38 and B37 pins
must be physically wired together (pin B38 to pin B38, and pin B37 to
pin B37). To use this feature with more than two IO112 I/O modules, all
the B38 pins must be wired together and all the B37 pins must be wired
together. One IO112 I/O module must be set to Initiator and all the others to Target.
Use of driver blocks: When using the Inter-Module Synchronization feature, the initiator must
use the Start conversion block, and the target the Read channels block.
Otherwise, with a single I/O module use the Analog input block to read
Invert Clock and Sync I/O
If this box is checked, the behavior of the clock and sync I/O pins
(B38 and B40) of the IO112 I/O module will be inverted.
PCI Slot (-1: autosearch)
There are two approaches for mapping the blocks to a specific I/O module installed
in the target machine. All modules of the same kind must be configured using the
Auto-Search: the default value -1
allows the real-time target machine to auto-search for the I/O module.
The priority is defined by the module ID (first vector element for a
multinode). The module with the lowest PCI bus/slot number is assigned
to module ID 1 (or [1 x]) and the next module found is assigned to
module ID 2 (or [2 x]), and so on
Explicit Addressing: the location of the module inside the target
machine can be explicitly defined by using the [BusNumber, SlotNumber]
format. To determine the bus number and the PCI slot number, run the
following command in the MATLAB command window:
Parameter Group: Analog input setup
Either 18-bit or 16-bit. By default, the IO112 I/O module is delivered
with 18-bit A/D converters. To make use of the full 18-bit resolution
select 18-bit. If 16-bit is selected, then only the 16 most significant
bits will be transferred to the input FIFO of the IO112 I/O module. In
this case, two 16-bit values (channels) are packed into a 32-bit word
when the Analog input or Read channels block (see below) retrieves the
converted values from the IO112 I/O module. This reduces the driver
latency to a certain extent. If 18-bit is selected no data packing
applies. If you have the 16-bit variant of the IO112 I/O module, then
always select 16-bit.
Number of Channels
The number of channels to read. This parameter is a scalar value and
must be a multiple of 2. The maximum value is 32, or 16 for the
16-channel variant. This field is restricted to multiples of 2 because
the IO112 I/O module returns two channels with each read of the analog
input data FIFO. If you want to acquire 13 channels for example, enter
the value "14" in the Number of
Channels field and ignore the last channel (14) in your
model. The first channel returned by either the Analog input or the Read
channels driver block is always channel 1 (or 0 according to the IO112
reference manual) and the last channel is always the n'th channel based
on the Number of Channels setting. In
Simulink Real-Time driver blocks, channel numbering starts at one (1)
even if the module's reference manual (I/O pin numbering) starts
numbering channels at zero (0).
The input range for all A/D channels. This driver does not allow
different ranges for individual channels.