National Instruments Welding System 321645c-01 Manual De Usuario

Chapter 2

Function Reference — CTR_Pulse

NI-DAQ FRM for PC Compatibles

2-102

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 National Instruments Corporation

Figure 2-9 shows pulse generation timing for both the TC toggled output and TC pulse output 
cases. These signals are positive polarity output signals.

Figure 2-9.  Pulse Generation Timing

An uncertainty is associated with the delay period due to counter synchronization. Counting 
starts on the first timebase edge after NI-DAQ applies the starting signal. The time between 
receipt of the starting pulse and start of pulse generation can be between (delay) and 
(delay + 1) units of the timebase in duration.

0 < sync period < 1

1

Timebase

Starting

 Signal

TC Toggle 

   Output 

TC Pulse

  Output

1

units = timebase period

- 1

1

1

1

delay

pulse_width

delay - 1

pulse_width - 1