CountDirection

Specify direction of counter channel

Description

When working with the session-based interface, use the CountDirection property to set the direction of the counter. Count direction can be 'Increment', in which case the counter operates in incremental order, or 'Decrement', in which the counter operates in decrements.

Examples

Create a session object, add a counter input channel, and change the CountDirection.

s = daq.createSession('ni');
ch = addCounterInputChannel (s,'cDAQ1Mod5', 0, 'EdgeCount')

ch = 

Data acquisition counter input edge count channel 'ctr0' on device 'cDAQ1Mod5':

      ActiveEdge: Rising
  CountDirection: Increment
    InitialCount: 0
        Terminal: 'PFI8'
            Name: empty
              ID: 'ctr0'
          Device: [1x1 daq.ni.DeviceInfo]
 MeasurementType: 'EdgeCount'

Change CountDirection to 'Decrement':

ch.CountDirection = 'Decrement'

ch = 

Data acquisition counter input edge count channel 'ctr0' on device 'cDAQ1Mod5':

      ActiveEdge: Rising
  CountDirection: Decrement
    InitialCount: 0
        Terminal: 'PFI8'
            Name: empty
              ID: 'ctr0'
          Device: [1x1 daq.ni.DeviceInfo]
 MeasurementType: 'EdgeCount'