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Chapter 2
Function Reference — Select_Signal
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 National Instruments Corporation
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NI-DAQ FRM for PC Compatibles
Signal Name Equivalencies
For a variety of reasons, some timing signals are given different names in the hardware 
documentation and the software and its documentation. The following table lists the 
equivalencies between the two sets of signal names. 
The VXI-MIO-64E-1 and VXI-MIO-64XE-10 devices use the VXIbus trigger lines to 
implement the RTSI bus synchronization between two or more such devices. The following 
table shows the mapping between the RTSI bus line (identifier) and the corresponding 
VXIbus trigger line.
Table 2-37.  E Series Signal Name Equivalencies
Signals
Hardware Name
Software Name
AI-Related
TRIG1
ND_IN_START_TRIGGER
TRIG2
ND_IN_STOP_TRIGGER
STARTSCAN
ND_IN_SCAN_START
SISOURCE
ND_IN_SCAN_CLOCK_TIMEBASE
CONVERT*
ND_IN_CONVERT
AIGATE
ND_IN_EXTERNAL_GATE
SI2SOURCE
ND_IN_CHANNEL_CLOCK_TIMEBASE
AO-Related
WFTRIG
ND_OUT_START_TRIGGER
UPDATE*
ND_OUT_UPDATE
AOGATE
ND_OUT_EXTERNAL_GATE
UISOURCE
ND_OUT_UPDATE_CLOCK_TIMEBASE
AO2GATE
N/A
UI2SOURCE
N/A
Table 2-38.  RTSI Bus Line and VXIbus Trigger Mapping
RTSI bus line identifier
VXIbus trigger line
ND_RTSI_0
VXIbus TTL Trigger 0 (TTLTRG0)
ND_RTSI_1
VXIbus TTL Trigger 1 (TTLTRG1)
ND_RTSI_2
VXIbus TTL Trigger 2 (TTLTRG2)
ND_RTSI_3
VXIbus TTL Trigger 3 (TTLTRG3)