1. Select an arbitrary switch as Control 1. In the picture a), Sj has been chosen. This switch will overwrite the function of Control 2.

  2. As a Control 2 select a proportional unit that will operate the Butterfly function (P2 in this example). Make sure it is evaluated proportionally (see picture b).

  3. Control 1 and Control 2 are linked together using AND logical function. It means that if the switch Sj is deactivated, the operation of P2 will be blocked. Otherwise P2 will function normally.

  4. In menu Fine Tuning → Butterfly assign the newly created switch L1 in the standard way and check its operation (picture c).

BFL-A

a)

BFL-B

b)

BFL-C

c)