National Instruments CFP-CTR-502, FP-CTR-502 Configuring Gate-Input Channels, Configuring Output Channels

FP-CTR-502 and cFP-CTR-502 10 ni.com

Each count-input channel has a software-enabled lowpass filter

that you can set to reject frequencies above 200Hz or 50 kHz.

Select 200Hz or 50 kHz from the Value menu to configure noise

rejection. The default is 50kHz.

You can set the Control command to increment or reset by selecting

Increment or Reset from the Action menu. The increment-control

command increases the count-input channel in value by one. The

reset-control command resets the count-input channel. The control

commands ignore the gate-source setting and gate-input state.

Configuring Gate-Input Channels

Channels 8–11 are gate-input channels. The only difference

between the input circuits of the gate-input channels and those of

the count-input channels is that the gate-input channels do not have

aprogrammable lowpass filter. The states of the gate inputs can

always be read as simple digital inputs on Channels 8–11.

You do not need to configure anything in software for the

gate-input channels.

Configuring Output Channels

Channels 12–15 are digital output channels. In the Channel

Configuration dialog box of FieldPoint software, you can select

attributes for each output channel from the Attributes menu. The

following sections describe the different attributes you can select

for output channels.

You can configure each output channel to operate either as an

associated output for one of the eight count-input channels or as

ageneric 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.