Ikegami OCP-300, Operation Manual

Page: 103 / 274

5. Operation of the Control Knob 5-11
3) Knob Free Lock Function (VR TYPE only)
The VR TYPE has the knob free lock function. With the standard knob free function, the
control knob becomes invalid while the knob free switch is being pressed. On the
contrary, with the knob free lock function, the control knob becomes invalid even when
the knob free switch is released.
When the knob free switch is released within approximately 0.5 sec. from when the
switch is pressed, the knob free becomes locked. Operations of pressing the switch,
checking the click sound, and releasing the switch require approximately this specified
time. Therefore, the knob free lock function becomes effective.
In addition, you can check that the knob free switch lights on while the knob free lock
function is working. Press the switch again to release the lock.
Caution
The knob free lock is released when the power is turned on, when the enable
is turned on, or when the assignment setting is conducted.
Note
: Whether or not the knob free lock function becomes effective depends on the
time duration before releasing the switch. This duration is counted on by the
operator's feeling. Try operating the switch for several times before actually
using the knob free lock function, so the operator can acquire the feeling for
the time duration for releasing the switch.