National Instruments NI CVS-1450 Series User Manual
Chapter 4
Digital I/O Functionality
© National Instruments Corporation
4-9
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.
on an Inspection in Progress light for an operator to see while the inspection
sequence is running.
I/O for Fault Conditions
The CVS-1450 device recognizes the following fault conditions:
•
External shutdown, when Shutdown mode is enabled
•
Watchdog timer expiration
•
Overheat
The behavior of the 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 4-4 summarizes how user
configuration affects the behavior of the CVS-1450 device in the event of a
fault condition. To resume operation, address the fault condition and reset
the CVS-1450 device. The following sections describe each fault condition.
dependent on configuration settings of the SAFE MODE DIP switch and
the software-enabled Shutdown mode. Table 4-4 summarizes how user
configuration affects the behavior of the CVS-1450 device in the event of a
fault condition. To resume operation, address the fault condition and reset
the CVS-1450 device. The following sections describe each fault condition.
Table 4-4. Configuration Settings and Effects
Fault
Condition
Configuration Settings
Configuration Effects
Safe Mode
DIP
Shutdown
Enabled
Processing Halts
Outputs Change to
User-Defined States
External
Shutdown
Shutdown
On
N/A
N/A
No
Off
On
Yes
Yes
Off
Off
No
No
Watchdog
On
N/A
N/A
No
Off
On
Yes
Yes
Off
Off
Yes
No
Overheat
On
N/A
Yes
No
Off
On
Yes
Yes
Off
Off
Yes
No