National Instruments NI 6014 User Manual
Page 30
Chapter 4
Connecting Signals
4-4
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PFI0/TRIG1
DGND
Input
Output
PFI0/Trigger 1—As an input, this signal is a Programmable
PFI. PFI signals are explained in the
section. As an output, this signal is the TRIG1
(AI Start Trigger) signal. In posttriggered DAQ sequences,
a low-to-high transition indicates the initiation of the
acquisition sequence. In pretriggered applications,
a low-to-high transition indicates the initiation of
the pretrigger conversions.
PFI1/TRIG2
DGND
Input
Output
PFI1/Trigger 2—As an input, this signal is a PFI. As an
output, this signal is the TRIG2 (AI Stop Trigger) signal.
In pretrigger applications, a low-to-high transition indicates
the initiation of the posttrigger conversions. TRIG2 is not
used in posttrigger applications.
PFI2/CONVERT*
DGND
Input
Output
PFI2/Convert—As an input, this signal is a PFI. As an
output, this signal is the CONVERT* (AI Convert) signal.
A high-to-low edge on CONVERT* indicates that an A/D
conversion is occurring.
PFI3/GPCTR1_SOURCE
DGND
Input
Output
PFI3/Counter 1 Source—As an input, this signal is a PFI.
As an output, this signal is the GPCTR1_SOURCE signal.
This signal reflects the actual source connected to the
general-purpose counter 1.
PFI4/GPCTR1_GATE
DGND
Input
Output
PFI4/Counter 1 Gate—As an input, this signal is a PFI.
As an output, this signal is the GPCTR1_GATE signal.
This signal reflects the actual gate signal connected to the
general-purpose counter 1.
GPCTR1_OUT
DGND
Output
Counter 1 Output—This output is from the general-purpose
counter 1 output.
PFI5/UPDATE*
DGND
Input
Output
PFI5/Update—As an input, this signal is a PFI. As an
output, this signal is the UPDATE* (AO Update) signal.
A high-to-low edge on UPDATE* indicates that the AO
primary group is being updated for the NI 6014.
PFI6/WFTRIG
DGND
Input
Output
PFI6/Waveform Trigger—As an input, this signal is a PFI.
As an output, this signal is the WFTRIG (AO Start Trigger)
signal. In timed AO sequences, a low-to-high transition
indicates the initiation of the waveform generation.
PFI7/STARTSCAN
DGND
Input
Output
PFI7/Start of Scan—As an input, this signal is a PFI. As an
output, this signal is the STARTSCAN (AI Scan Start)
signal. This pin pulses once at the start of each AI scan in
the interval scan. A low-to-high transition indicates the start
of the scan.
Table 4-2. Signal Descriptions for I/O Connector Pins (Continued)
Signal Name
Reference
Direction
Description