I/O For Fault Conditions - National Instruments NI Vision CVS-1454 User Manual

I/O for Fault Conditions

© National Instruments Corporation
General-Purpose Outputs
The primary difference between general-purpose outputs and timed pulse
outputs is that the timing of general-purpose outputs is controlled by
software rather than hardware. As a result, timing of general-purpose
outputs changes as the inspection algorithm changes, which makes
general-purpose outputs less appropriate than timed outputs for camera
control, strobe light control, and other applications that require precise
timing.
An example of using general-purpose outputs is driving a relay that turns
on an Inspection in Progress light for an operator to see while the inspection
sequence is running.
The NI CVS-1450 device recognizes the following fault conditions:
• External shutdown, when shutdown mode is enabled
• Watchdog timer expiration
• Overheat
The behavior of the NI CVS-1450 device in the event of a fault condition
is dependent on configuration settings of the SAFE MODE DIP switch and
the software-enabled shutdown mode. Table 3-4 summarizes how user
configuration affects the behavior of the NI CVS-1450 device in the event
of a fault condition. To resume operation, address the fault condition and
reset the NI CVS-1450 device. The following sections describe each fault
condition.
3-9
Chapter 3 Digital I/O Functionality
NI CVS-1450 Series User Manual