Trane VarioTrane TR1 2800 Series, Operating Instructions Manual

Page: 37 / 137

If Relative [1] is selected, one of the added preset ref-
erences (parameters 215-218 Preset reference ) is sum-
marized as a percentage of the sum of present
external references.
If
External/preset [2] is selected, it is possible via a
digital input to shift between external references or
preset references. Preset references will be a percent-
age value of the reference range.
NOTE:
If Sum or Relative is selected, one of the preset ref-
erences will always be active. If the preset references
are to be without influence, they must be set to 0%
(factory setting).
215 Preset reference 1 (PRESET REF. 1)
216 Preset reference 2 (PRESET REF. 2)
217 Preset reference 3 (PRESET REF. 3)
218 Preset reference 4 (PRESET REF. 4)
Value:
-100.00% - +100.00%
0.00%
of the reference range/external reference
Function:
Four different preset references can be programmed
in parameters 215-218
Preset reference .
The preset reference is stated as a percentage of the
reference range (Ref MIN - Ref MAX) or as a percent-
age of the other external references, depending on
the choice made in parameter 214
Reference func-
tion . The choice between preset references can be
made via the digital inputs or via serial communica-
tion.
Preset ref., msb Preset ref. lsb
0 0 Preset ref. 1
0 1 Preset ref. 2
1 0 Preset ref. 3
1 1 Preset ref. 4
Description of choice:
Set the preset reference(s) that is/are to be the op-
tions.
219 Catch up/ Slow down reference
Value:
0.00 - 100% of the given reference
0.00%
Function:
In this parameter, the percentage value can be set
which will either be added to or deducted from the
remote-controlled references.
The remote-controlled reference is the sum of preset
references, analogue references, pulse reference and
any references from serial communication.
Description of choice:
If Catch up is active via a digital input, the percentage
value in parameter 219 Catch up/Slow down refer-
ence will be added to the remote-controlled refer-
ence.
If
Slow down is active via a digital input, the percent-
age value in parameter 219 Catch up/Slow down refer-
ence will be deducted from the remote-controlled
reference.
221
Current limit, I LIM
Value:
0 - XXX.X % of par. 105
160 %
Function:
In this parameter, the maximum output current I LIM
is set. The factory-set value corresponds to the max-
imum output current IMAX . If the current limit is to
be used as motor protection, set the rated motor cur-
rent. If the current limit is set above 100% (the rated
output current of the frequency converter, I INV.), the
frequency converter can only handle a load intermit-
tently, i.e. for short periods at a time. After the load
has been higher than IINV., it must be ensured that
for a period the load is lower than I INV. Please note
that if the current limit is set at a lower value than
IINV., the acceleration torque will be reduced to the
same extent.
Description of choice:
Set the required maximum output current I LIM.
36 TR1 2800 Series VFD
Programming