Functions, monitoring, and protective functions
9.3 Drive functions
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
325
Table 9-3
Settings for motor changeover (example)
Parameters
Settings
Remark
p0130
2
Configure 2 MDS
p0180
2
Configure 2 DDS
p0186[0..1]
0, 1
The MDS are assigned to the DDS.
p0820
Digital input, DDS selection
p0821 to p0824
0
The digital input to change over the motor is selected via the
DDS. Binary coding is used (p0820 = bit 0 etc.).
p0826[0..1]
1, 2
Different numbers mean different thermal models.
p0827[0..1]
0, 1
The bits of p0830 are assigned to the MDS. If p0827[0] = 0,
for example, bit p0830.0 is set via DDS0 when MDS0 is
selected.
p0830.0 and p0830.1
Digital outputs, auxiliary
contactors
The digital outputs for the auxiliary contactors are assigned to
the bits.
p0831[0..1]
Digital inputs, auxiliary contacts The digital inputs for the feedback signal of the motor
contactors are assigned.
p0833.00 and .01
0, 0
The drive controls the contactors and pulse suppression.
Motor changeover sequence
1.
Start condition:
For synchronous motors, the actual speed must be lower than the speed at the start of
field weakening. This prevents the regenerative voltage from exceeding the terminal
voltage.
2.
Pulse suppression:
The pulses are suppressed following the selection of a new drive data set using p0820 to
p0824.
3.
Open motor contactor:
Motor contactor 1 is opened r0830 = 0 and the status bit "Motor changeover active"
(r0835.0) is set.
4.
Changeover drive data set:
The requested data set is activated (r0051 = data set currently effective, r0837 =
requested data set).
5.
Energize motor contactor:
After the feedback signal (motor contactor opened) from motor contactor 1, the
appropriate bit of r0830 is set and motor contactor 2 is energized.
6.
Enable pulses:
After the feedback signal (motor contactor closed) from motor contactor 2, the bit "motor
data set changeover active" (r0835.0) is reset and the pulses are enabled. The motor has
now been changed over.
9.3.6.3
Function diagram
FP 8565
Drive Data Set (DDS)
FP 8575
Motor Data Sets (MDS)