Справочник Пользователя для National Instruments Welding System 321645c-01
Chapter 2
Function Reference — CTR_EvCount
©
National Instruments Corporation
2-93
NI-DAQ FRM for PC Compatibles
10:
SOURCE5 used as timebase if 1
≤
ctr
≤
5 or SOURCE 10 used as timebase
if 6
≤
ctr
≤
10.
11:
GATE 1 used as timebase if 1
≤
ctr
≤
5 or GATE6 used as timebase
if 6
≤
ctr
≤
10.
12:
GATE 2 used as timebase if 1
≤
ctr
≤
5 or GATE7 used as timebase
if 6
≤
ctr
≤
10.
13:
GATE 3 used as timebase if 1
≤
ctr
≤
5 or GATE8 used as timebase
if 6
≤
ctr
≤
10.
14:
GATE 4 used as timebase if 1
≤
ctr
≤
5 or GATE9 used as timebase
if 6
≤
ctr
≤
10.
15:
GATE 5 used as timebase if 1
≤
ctr
≤
5 or GATE10 used as timebase
if 6
≤
ctr
≤
10.
Set timebase to zero to concatenate counters. Set timebase to 1 through 5 for the counter to
count one of the five available internal signals. Set timebase to 6 through 15 (except 10 for
the PC-TIO-10) to provide an external signal to a counter. This external signal is then the
signal NI-DAQ counts for event counting.
count one of the five available internal signals. Set timebase to 6 through 15 (except 10 for
the PC-TIO-10) to provide an external signal to a counter. This external signal is then the
signal NI-DAQ counts for event counting.
cont indicates whether counting continues after the counter reaches 65,535 and rolls over to
zero. cont can be either zero or 1. If cont = 0, event counting stops when the counter reaches
65,535 and rolls over, in which case an overflow condition is registered. If cont = 1, event
counting continues when the counter rolls over and no overflow condition is registered.
cont = 1 is useful when more than one counter is concatenated for event counting.
zero. cont can be either zero or 1. If cont = 0, event counting stops when the counter reaches
65,535 and rolls over, in which case an overflow condition is registered. If cont = 1, event
counting continues when the counter rolls over and no overflow condition is registered.
cont = 1 is useful when more than one counter is concatenated for event counting.
Using This Function
CTR_EvCount
configures the specified counter for an event-counting operation. The function
configures the counter to count up from zero and to use the gating mode, edge mode, output
type, and polarity as specified by the
type, and polarity as specified by the
CTR_Config
call.
Note
Edge gating mode does not operate properly during event counting if cont = 1.
If cont = 1, use level gating modes or no-gating mode.
If cont = 1, use level gating modes or no-gating mode.
Applications for
CTR_EvCount
are discussed in Event-Counting Applications in Chapter 3,
Software Overview, of the NI-DAQ User Manual for PC Compatibles.