©
National Instruments Corp.
11
FP-CTR-500 and cFP-CTR-500
Output Source
You can configure each output channel to operate either as an
associated output for one of the eight count-input channels or as
a generic digital output. Select
Counter Channel 0–7
from the
Value menu if you want the digital output channel to operate as an
output for a corresponding count-input channel. Select
Discrete
Data
from the Value menu if you want to use this channel as a
generic digital output. When you write data to an output channel,
you affect the output state only if you configure the Output Source
as Discrete Data.
Output Mode
For each output channel, select one of the following output modes
from the Value menu:
Toggle, Reset Off
;
Toggle, Reset On
;
On Pulse
; or
Off Pulse
. The output modes work only if you select
Counter Channel 0–7
for the
Output Source
. The following
sections describe the different output modes.
Toggle, Reset Off
In Toggle, Reset Off mode, the output channel starts low and goes
high when the terminal count is exceeded. The output channel
returns to low the next time the terminal count is exceeded or when
you send a reset command to the associated count-input channel.
In Figure 7, the terminal count is 4.
Figure 7.
Output of a Channel Set to Toggle, Reset Off Mode
0
1
2
3
4
0
1
2
3
4
0
1
Output
Count
Input