Trane VarioTrane TR1 2800 Series, Руководство по эксплуатации

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100 Configuration
Value:
Speed control, open loop
(SPEED
OPEN LOOP) [0]
Speed control, closed loop
(SPEED
CLOSED LOOP) [1]
Process control, closed loop
(PROCESS CLOSED LOOP)
[3]
Function:
This parameter is used to select the configuration to
which the frequency converter is to be adapted. This
makes adaptation to a given application simple, since
the parameters not used in a given configuration are
hidden (not active).
Description of choice:
If Speed control, open loop [0] is selected, normal
speed control is obtained (without feedback signal)
with automatic load and slip compensation to ensure
a constant speed at varying loads. Compensations
are active, but may be disabled in parameter 134
Load
compensation and parameter 136 Slip compensation as
required.
If
Speed control, closed loop [1] is selected, better
speed accuracy is obtained. A feedback signal must
be added, and the PID regulator must be set in pa-
rameter group 400
Special functions .
If Process control, closed loop [3] is selected, the inter-
nal process regulator is activated to enable precise
control of a process in relation to a given process sig-
nal. The process signal can be set to the relevant
process unit or as a percentage. A feedback signal
must be added from the process and the process reg-
ulator must be set in parameter group 400
Special
functions . Process closed loop is not active if a Devi-
ceNet card is mounted and Instance 20/70 or 21/71 is
chosen in parameter 904
Instance types .
101 Torque characteristic
Value:
Constant torque
(Constant
torque) [1]
Variable torque low
(torque:
low) [2]
Variable torque medium
(torque:
med) [3]
Variable torque high
(torque:
high) [4]
Variable torque low with CT start
(VT
LOW CT START) [5]
Variable torque medium with CT start
(VT
MED CT START) [6]
Variable torque high with CT start
(VT
HIGH CT START) [7]
Special motor mode
(Special
motor mode) [8]
CT = Constant torque
Function:
This parameter enables a choice of principle for adap-
tation of the U/f ratio of the frequency converter to
the torque characteristic of the load. See par. 135
U/f
ratio
.
Description of choice:
If
Constant torque
[1] is selected, a load-dependent U/
f characteristic is obtained, in which output voltage
and output frequency are increased at increasing
loads in order to maintain constant magnetization of
the motor.
Select
Variable torque low [2], Variable torque medium
[3] or Variable torque high [4], if the load is square
(centrifugal pumps, fans).
Variable torque - low with CT start [5], - medium with CT
start [6] or high with CT start [7], are selected if you
need a greater breakaway torque than can be ach-
ieved with the three first characteristics.
NOTE:
Load and slip compensation are not active if variable
torque or special motor mode have been selected.
Select Special motor mode [8], if a special U/f setting is
needed that is to be adapted to the present motor.
The break points are set in parameters 423-428
Volt-
age/frequency .
24 TR1 2800 Series VFD
Load and Motor
Programming