National Instruments CFP-CTR-502, FP-CTR-502 Gate Source, Read Reset Mode

to Channel 0, Channel 0 to Channel 7, Channel 7 to Channel 6,

andso on. If you select this option for all of the channels, no

counting occurs.

Gate Source

Select Gate Input 0–3 from the Value menu to associate a

gate-input channel with a count-input channel. If the count-input

channel uses one of the external gate inputs, counting is enabled

when the gate-input signal is high and is disabled when the signal

is low, as shown in Figure6. The gate-input signal is high when the

channel is ON. The external device determines the high and low

intervals of the gate-input signal. Ifyou do not associate a

gate-input channel with the count-input channel, select Always

Disabled or Always Enabled. Select Always Enabled if you want

the count-input channel to count at all times, even if there is

nothing wired to the gate input. Always Enabled is the default

value.

Figure 6. Gate Source Set to External Gate Input

Read Reset Mode

You can configure each count-input channel to reset each time the

FieldPoint network module reads it by selecting Reset on Read

from the Value menu. A read-initiated reset also resets any outputs

associated with the target channel. The default is Don’t Reset

OnRead.

Note Read Reset mode is not intended to be used with

FieldPoint Ethernet network modules.

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Gate

Input

Count

Input