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Testing a Control Link

A tremendous benefit of the HAL System is the ability to immediately test control links from within Halogen — as soon as you create them. No hardware is needed. Of course, you'll want to test with the hardware once your system is installed, but there is no need to wait until installation to know if your controls are properly linked!

note: You can test read-only controls (such as switches connected to Logic In ports) from within Halogen even when Halogen is connected from HAL. When connected, however, if you change the software setting of a read-only control, Halogen indicates that it is overriding the actual hardware setting by displaying a Cancel Override button in the control's dialog. Click the Cancel Override button to revert to the actual state of the connected hardware.

note: HAL cancels all overrides when you disconnect Halogen or when HAL reboots. To easily cancel all overrides from with Halogen, click the Cancel All Port Overrides button in the Cancel Port Overrides dialog:

Cancel All Port Overrides

To test a control link:

  1. Click the Processing tab to open the Processing Workspace.
  2. Open all the controls participating in the link that you are testing. For example, if you're testing a link between a DR1 and a Level processing block, open the Level control associated with the DR1 (by clicking the control in the Control palette) and open the properties dialog of the Level processing block (by double-clicking the block in the Processing Map).
  3. Change one of the controls. If your link is active and working correctly, the other controls in the link should track the change. (Specifics for testing each link type are listed below.)

See Also