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Chapter 2 Function Reference — GPCTR_Change_Parameter
©
National Instruments Corporation 2-199 NI-DAQ FRM for PC Compatibles
Legal values for paramValue depend on paramID. The following paragraphs list legal
values for paramID with explanations and corresponding legal values for paramValue:
paramID =
ND_SOURCE
The general-purpose counter counts transitions of this signal. Corresponding legal values for
paramValue are as follows:
Table 2-20.
Legal Values for
gpctrNum
Parameter
All DSA and E Series Devices 6602 Devices
ND_COUNTER_0
ND_COUNTER_1
ND_COUNTER_0
ND_COUNTER_1
ND_COUNTER_2
ND_COUNTER_3
ND_COUNTER_4
ND_COUNTER_5
ND_COUNTER_6
ND_COUNTER_7
Table 2-21.
Legal Values for
paramValue
when
paramID =
ND_SOURCE
445X and E Series Devices 6602 and 455X Devices
ND_PFI_0 through ND_PFI_9
—
the 10
I/O connector pins*.
ND_RTSI_0 through ND_RTSI_6—the
seven RTSI lines.
ND_INTERAL_20_MHZ and
ND_INTERNAL_100_KHZ—the internal
timebases
ND_OTHER_GPCTR_TC—the terminal
count of the other general-purpose
counter (See Table 2-22 for definition of
other counter).
I/O connector pins ND_PFI_39*,
ND_PFI_35*, ND_PFI_31,
ND_PFI_27, ND_PFI_23,
ND_PFI_19, ND_PFI_15, and ND_PFI_11.
ND_RTSI_0 through ND_RTSI_6—the seven RTSI
lines.
ND_INTERNAL_20_MHZ
and
ND_INTERNAL_100_HZ
—the internal timebases.
ND_INTERNAL_MAX_TIMEBASE—the maximum
timebase. The value of this timebase can be determined
by a
GPCTR_Watch call, ND_OTHER_GPCTR_GATE
(See Table 2-22 for definition of other counter).
ND_OTHER_GPCTR_TC—the terminal count of the
other general-purpose counter (See Table 2-22 for
definition of other counter).
*ND_PFI_39
,
ND_PFI_35
,
ND_COUNTER_2
through
ND_COUNTER_7
are not available on 455X
devices.