B&R 8I84T200037.01P-1, User Manual

Page: 154 / 405

Programming guidelines
154 ACOPOSinverter P84 User's Manual 2.10
Code Name/Description Factory settings
Ctt [Motor control type] [SVC U] (UUC)
UUC [SVC U] (UUC) : Voltage flux vector control in open control loop with automatic slip compensation depending on the load. This supports operation
with several motors connected parallel on the same inverter (if the motors are identical).
CUC [SVC I] (CUC) : Current-flow vector control in open control loop. This supports operation with several motors connected parallel on the same
inverter.
FUC [FVC] (FUC) : Current-flow vector control in closed control loop for motors with incremental encoder sensor. This option can only be selected if
an incremental encoder card has been inserted. This function is not possible, however, if an encoder that only generates signal "A" is used. It
provides precise speed and torque values and allows you to obtain a torque at zero speed. It supports operation with several motors connected
parallel on the same inverter.
Note:
It is important that prior to the selection of [FVC] (FUC) the encoder test, see "Encoder testing" on page 157 , is performed.
UF2
[V/f Reg 2P]
(UF2) : Simple V/f characteristic curve, without slip compensation. Enables the operation with the following motors:
•
Special motors (slip ring rotor, piston rotor, etc.)
•
Several motors connected in parallel to the same inverter
•
High-speed motors
•
Motors with low power in comparison to the inverter
Voltage
UnS
U0
FrS
Frequency
The characteristic curve
comes from the values
of the parameters UnS,
FrS and U0.
UF5 [V/f Reg 5P] (UF5) : V/f-characteristic with 5 segments: As for the V/f characteristic with 2 points, but also possible resonance phenomena
(saturation) can be avoided.
UnS
U5
U4
U3
U2
U1
U0
F1 F2 F3 F4 F5 FrS
Frequency
Voltage
The characteristic curve
comes from the values of
the parameters UnS,
FrS, U0 to U5 and
F0 to F5.
FrS > F5 > F4 > F3 > F2 > F1