4.4 Parameter Group 2-** 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 - 1000 Hz
(1000 Hz CLOCK WISE)
[3]
Both directions, 0 - 1000 Hz
(1000 Hz BOTH DIRECT)
[4]
Anti-clockwise only, 0 - 1000 Hz
(1000 Hz COUNTER CLOCK)
[5]
Function:
This parameter guarantees protection against unwanted reversing. Fur-
thermore, 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. Please note that if
Clockwise only
[0]/[3] or
Anti-clockwise
only
[2]/[5] is selected, the output frequency will be limited to the range
f
MIN
-f
MAX
. If
Both directions
[1]/[4] is selected, the output frequency will
be limited to the range ± f
MAX
(the minimum frequency is of no signifi-
cance).
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 chosen can range from 0.0 Hz to the frequency set in param-
eter 202
Output frequency high limit, f
MAX
.
202
Output frequency high limit, f
MAX
Value:
f
MIN
- 132/1000 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.
NB!
The output frequency of the frequency converter can
never assume a value higher than 1/10 of the switch-
ing frequency (parameter 411
Switching frequency
).
Description of choice:
A value can be selected from f
MIN
to the value chosen in parameter 200
Output frequency range
.
4.4.1 Handling of References
Handling of references is described in the block diagram below. The block
diagram shows how a change in one parameter can affect the resulting
reference.
Parameters 203 to 205
Reference
and parameter 214
Reference func-
tion
define how the handling of references can be performed. The pa-
rameters mentioned can be active in both closed and open loop.
Remote controlled references are defined as:
-
External references, such as analogue inputs 53 and 60, pulse
references via terminal 33 and references from serial commu-
nication.
-
Preset references.
The resulting reference can be shown on the LCP control unit's display by
selecting
Reference
[%] in parameters 009-012
Display readout
and can
VLT
®
Decentral FCD 300 Design Guide
4 Programming
MG.90.S1.02 - VLT
®
is a registered Danfoss trademark
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