4.3 References & Limits
200 Output frequency range
Value:
Only clockwise, 0-132 Hz
(132 Hz CLOCKWISE) [0]
Both directions, 0-132 Hz
(132 Hz BOTH DIRECT) [1]
Anti-clockwise only, 0-132 Hz
(132 Hz COUNTER CLOCK) [2]
Clockwise only, 0-590 Hz
(590 Hz CLOCK WISE) [3]
Both directions, 0-590 Hz
(590 Hz BOTH DIRECT) [4]
Anti-clockwise only, 0-590 Hz
(590 Hz COUNTER CLOCK) [5]
Function:
This parameter guarantees protection against unwanted
reversing. Furthermore, the maximum output frequency
can be selected that is to apply regardless of the settings
of other parameters. This parameter has no function if
Process regulation, closed loop has been selected in
parameter 100 Configuration.
Description of choice:
Select the required direction of rotation as well as the
maximum output frequency. Note that if [0]/[3] Clockwise
only or [2]/[5] Anti-clockwise only is selected, the output
frequency is limited to the range f
MIN
-f
MAX
. If [1]/[4] Both
directions is selected, the output frequency is limited to the
range ±f
MAX
(the minimum frequency is of no significance).
Illustration 4.6 Rotation Direction and Output Frequency
Range
201
Output frequency low limit, f
MIN
Value:
0.0 - f
MAX
0.0 Hz
Function:
In this parameter, a minimum motor frequency limit can
be selected that corresponds to the minimum speed at
which the motor is allowed to run. If Both directions has
been selected in parameter 200 Output frequency range, the
minimum frequency is of no significance.
Description of choice:
The value select can range from 0.0 Hz to the frequency
set in parameter 202 Output frequency high limit, f
MAX
.
202
Output frequency high limit, f
MAX
Value:
f
MIN
- 132/590 Hz (par. 200 Output frequency
range) 132 Hz
Function:
In this parameter, a maximum output frequency limit can
be selected that corresponds to the highest speed at
which the motor is allowed to run.
Description of choice:
A value can be selected from f
MIN
to the value select in
parameter 200 Output frequency range.
CAUTION
The output frequency of the frequency converter can
never assume a value higher than 1/10 of the switching
frequency (parameter 411 Switching frequency).
Illustration 4.7 shows how a change in one parameter can
affect the resulting reference.
Parameters 203 to 205 Reference and parameter 214
Reference function define how the handling of references
can be performed. The parameters mentioned can be
active in both closed and open loop.
Remote controlled references are defined as:
•
External references, such as analog inputs 53 and
60, pulse references via terminal 33 and
references from serial communication.
•
Preset references.
The resulting reference can be shown in the LCP display
by selecting Reference [%] in parameters 009-012 Display
readout and can be shown as one unit by selecting
Reference [unit]. The sum of the external references can be
shown in the LCP display as a % of the area from Minimum
reference, Ref
MIN
to Maximum reference, Ref
MAX
. Select [25]
External reference, % in parameters 009-012 Display readout
if a readout is desired.
It is possible to have both references and external
references simultaneously. In parameter 214 Reference
Programming
Design Guide
MG27E402 Danfoss A/S © Rev. May/2014 All rights reserved. 77
4 4
To Next Page
Loading...
Need help?
General
