DURKOPP ADLER 878-M PREMIUM, Service Instructions Manual

Page: 93 / 130

Programming
Service Instructions 878-M PREMIUM - 03.0 - 10/2019 91
Test PWM
(Test of the pulse width modulation) subitem
Test of the pulse width modulation. Set the electrical voltage in proportion
to the force exerted by the electrical actuator (100% corresponds to 24 V).
The modulation is applied in 2 periods (t1 and t2) and must be adjusted
in percentages. The BOOST function effects a voltage overshoot in
period (t1).
To check the power outputs of the pulse width modulation:
1. Use the 
/
 in the
Thick
field to choose the element that you wish
to test.
Fig. 60: The
Test PWM
(Test of the pulse width modulation) subitem
2. Press the OK button to confirm the selection.

The
Value
display toggles between
On
and
Off
every time the OK
button is pressed.
3. Observe the selected element and check if pressing on OK actually
triggers it.
Important
The values indicated in the % field merely provide a reference point as to
the range within which the tension may increase or decrease.
Test Input
subitem
Testing the inputs according to the interconnection diagram.
To perform the test steps:
1. Select the desired element with the

/

in the Input field.
Fig. 61:
Test Input
subitem
2. Confirm the selected element (e.g. button, knee lever, etc.).
3. Observe the display on the control panel.

If the element is functional, the display switches between On and
Off under Value .
Value :
PWM :
OFF(0)
2
Value :
Input :
ON(1)
1