National Instruments cFP-PWM-520 Manual De Usuario

A [c]FP-PWM-520 output channel uses period and duty-cycle 
settings to determine when the channel is on or off. To configure 
the period, complete the following steps in Measurement & 
Automation Explorer (MAX):

1. On the Channel Configuration tab for the [c]FP-PWM-520, 

select Period from the Attribute menu.

2. Enter an integer between 1 ms (1 kHz) and 65,535 ms 

(0.01525 Hz) in the Value field.

To configure the duty cycle, write to the channel for which you 
want to set the duty cycle. The duty cycle is the proportion of time 
that the PWM signal is ON over the period.

Enter a value from 0 to 100 to set the duty cycle. The duty cycle has 
12-bit resolution (4,096 discrete duty-cycle settings).

Figure 4.  Period and Duty Cycle of a PWM Output

The [c]FP-PWM-520 has two green status LEDs, POWER and 
READY. After you insert the FP-PWM-520 onto a terminal base 
or the cFP-PWM-520 onto a backplane and apply power to the 
connected network module, the green POWER indicator lights 
and the [c]FP-PWM-520 informs the network module of its 
presence. When the network module recognizes the 

1

PWM Output

2

On  Time

3

Period

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100

×

=

0

V

SUP

1

3

2

2

3