Danfoss VLT 5000 Series Instruction Manual page 125

Function:
In this parameter, the signal value is set that corre-
sponds to the maximum reference value set in param-
eter 205. Setting of this parameter affects an internal
filter constant, i.e. at 100 Hz = 5 sec; 1 kHz = 0.5 sec.
and at 10 kHz = 50 msec. To avoid a too long filter time
constant at low pulse resolution, the reference (pa-
rameter 205) and this parameter can be multiplied by
the same factor and in this way use the lower reference
range.
Description of choice:
Set the desired pulse reference.
328 Pulse feedback, max. frequency
(PULSE FEEDB MAX)
Value:
100 - 65000 Hz at terminal 33
Function:
This is where to set the feedback value that is to cor-
respond to the maximum feed back value.
Description of choice:
Set the desired feedback value.
329 Encoder feedback pulse/rev.
(ENCODER PULSES)
Value:
128 pulses /rev. (128)
256 pulses /rev. (256)
512 pulses /rev. (512)
1024 pulses /rev. (1024)
2048 pulses /rev. (2048)
4096 pulses /rev. (4096)
This value can also be set between 1-4096 pulses/rev.
Function:
This is where to set the encoder pulses per revolution
that correspond to the motor rpm.
This parameter is only available in Speed control,
closed loop and in Torque control, speed feedback (pa-
rameter 100).
= factory setting, () = display text, [] = value for use in communication via serial communication port
122
Description of choice:
Read the correct value from the encoder. Pay attention
to the speed limitation (rpm) for a given number of pul-
ses/rpm, see the drawing below:
The encoder used is to be of the Open Collector PNP
0/24 V DC type (max. 20 kHz) or a Push-Pull circuit
0/24 V DC (max. 65 kHz).
25000 Hz
330
Value:
No operation (NO OPERATION)
Freeze reference (FREEZE REFERENCE)
Freeze output (FREEZE OUTPUT)
Function:
In this parameter it is possible to freeze either the ref-
erence or the output.
[128]
[256]
Description of choice:
[512]
Freeze reference [1] freezes the actual reference. The
frozen reference is now the basis for Speed up and
[1024]
Speed down.
[2048]
Freeze output [2] freezes the actual motor frequency
[4096]
(Hz). The frozen frequency is now the basis for Speed
up and Speed down.
MG.51.C5.22 - VLT
®
VLT 5000 Series
Freeze reference/output function
(FREEZE REF/OUTP.)
NOTE
If Freeze output is active, the adjustable
frequency drive cannot be stopped via ter-
minals 18 and 19, but only via terminal 27
(to be programmed for Coasting stop, in-
is a registered Danfoss trademark.
[0]
[1]
[2]