References & Limits; Handling Of References - Danfoss VT2800 Series Design Manual

References & Limits
200 Output frequency range
(OUT FREQ. RNG/ROT)
Value:
Only clockwise, 0 - 132 Hz
(132 HZ CLOCKWISE)
Both directions, 0 - 132 Hz
(132 HZ BOTH DIRECT)
Anti-clockwise only, 0 - 132 Hz
(132 HZ COUNTER CLOCK)
Clockwise only, 0 - 1000 Hz
(1000 HZ CLOCK WISE)
Both directions, 0 - 1000 Hz
(1000 HZ BOTH DIRECT)
Anti-clockwise only, 0 - 1000 Hz
(1000 HZ COUNTER CLOCK)
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. 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 -f . If Both directions [1]/[4] is selected,
MIN MAX
the output frequency will be limited to the range ± f
(the minimum frequency is of no significance).
MAX
= factory setting. () = display text [] = value for use in communication via serial communication port
78
VLT
201 Output frequency low limit, f
(MIN OUTPUT FREQ)
Value:
0.0 - f
MAX
Function:
In this parameter, a minimum motor frequency limit can
[0]
be selected that corresponds to the minimum speed
at which the motor is allowed to run. If Both directions
[1]
has been selected in parameter 200 Output frequency
range, the minimum frequency is of no significance.
[2]
Description of choice:
[3]
The value chosen can range from 0.0 Hz to
the frequency set in parameter 202 Output
[4]
frequency high limit, f
[5]
202 Output frequency high limit, f
(MAX. OUTPUT FREQ)
Value:
f - 132/1000 Hz (par. 200 Output frequency range)
MIN
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 switching frequency
(parameter 411 Switching frequency).
Description of choice:
A value can be selected from f
in parameter 200 Output frequency range.

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 function define how the handling
of references can be performed. The parameters
mentioned can be acti v e 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 communication.
MG.28.E9.02 - VLT is a registered Danfoss trademark
®
2800 Series
MIN
0.0 Hz
.
MAX
MAX
132 Hz
to the value chosen
MIN