Connections

Array of connections in session

Description

This session property contains and displays all connections added to the session.

Tip

You cannot directly add or remove connections using the Connections object properties. Use addTriggerConnection and addClockConnection to add connections. Use removeConnection to remove connections.

Values

The value is determined by the connections you add to the session.

Examples

Remove Synchronization Connection

This example shows you how to remove a synchronization connection.

Create a session and add analog input channels and trigger and clock connections.

s = daq.createSession('ni')
addAnalogInputChannel(s,'Dev1', 0, 'voltage');
addAnalogInputChannel(s,'Dev2', 0, 'voltage');
addAnalogInputChannel(s,'Dev3', 0, 'voltage');
addTriggerConnection(s,'Dev1/PFI4','Dev2/PFI0','StartTrigger');
addTriggerConnection(s,'Dev1/PFI4','Dev3/PFI0','StartTrigger');
addClockConnection(s,'Dev1/PFI5','Dev2/PFI1','ScanClock');

Examine the session Connections property.

s.Connections

ans = 

Start Trigger is provided by 'Dev1' at 'PFI4' and will be received by:
         'Dev2' at terminal 'PFI0'
         'Dev3' at terminal 'PFI0'
Scan Clock is provided by 'Dev1' at 'PFI5' and will be received by:
         'Dev2' at terminal 'PFI1'
         'Dev3' at terminal 'PFI1'

   index     Type      Source   Destination
   ----- ------------ --------- -----------
   1     StartTrigger Dev1/PFI4 Dev2/PFI0
   2     StartTrigger Dev1/PFI4 Dev3/PFI0
   3     ScanClock    Dev1/PFI5 Dev2/PFI1
   4     ScanClock    Dev1/PFI5 Dev3/PFI1

Remove the last clock connection at index 4 and display the session connections.

removeConnection(s,4)
s.Connections

ans = 

Start Trigger is provided by 'Dev1' at 'PFI4' and will be received by:
         'Dev2' at terminal 'PFI0'
         'Dev3' at terminal 'PFI0'
Scan Clock is provided by 'Dev1' at 'PFI5' and will be received by 'Dev2' at terminal 'PFI1'.

   index     Type      Source   Destination
   ----- ------------ --------- -----------
   1     StartTrigger Dev1/PFI4 Dev2/PFI0
   2     StartTrigger Dev1/PFI4 Dev3/PFI0
   3     ScanClock    Dev1/PFI5 Dev2/PFI1