Lenze EVS9332xS - Manual (Page 168)

Function library
Function blocks
3.2.40 Mains failure control (MFAIL)
3−116
l
EDSVS9332S−EXT EN 2.0
Parameter setting
The parameters to be set depend strongly on the motor used, the inertia of the driven machine and
the drive configuration (single drive, drive network, master/slave operation etc.). For this reason, this
function must be adjusted to the prevailing application case.
The following specifications refer to chapter 3.2.40.1.
Important settings prior to the initial set−up:
1. Save the previous setting in a parameter set (e.g. parameter set 4)
(
Stop!
For the internal voltage supply of the terminals (C0005 = xx1x) the terminal X6/63 is
used as a voltage source for external potentiometers. In this case, measure at the
terminals +UG, −UG.
2. Measure the DC bus voltage with an oscilloscope (channel 1)
– with a suitable voltage divider across terminals +UG, −UG. or
– by outputting the DC−bus voltage e.g. to terminal X6/62. For this purpose set C0436 = 5005
(MCTRL−DCVOLT). 1 V at terminal X6/63 = 100 V to +UG, −UG.
3. Measure the speed with an oscilloscope (channel 2)
– by outputting the speed e.g. to terminal X6/62. (Standard setting). For this purpose set
C0431 = 5001 (MCTRL−NACT). 10 V to terminal X6/62 = nmax (C0011).
4. Defining the operating threshold for the mains failure detection in C0472/20. The definition
depends on the setting in C0173.
– Set the operating threshold approx. 50 V above the LU switch−off threshold (e.g. C0173 = 0,
1; C0472/20 = 48 %
¢ 480 V).