Lenze 8615E - Manual (Page 77)

Closed-loop speed control
For a number of applications, the accuracy which be obtained
with open-loop control is often not To avoid a
which occurs when an asynchronous motor is
loaded, you select a configuration with a Pl The
appropriate configuration depends on the way of input and
the value input you want to use.
control:
Code Parameter Meaning Acceptance
1 2 value
-1 Terminals (bipolar) or Terminals Terminals [SH PRG]
LECOM (bipolar) or keypad (bipolar) analog act. value
(bipolar)
Terminals (bipolar) or Terminals Input X5
LECOM (bipolar) or keypad (bipolar) Digital frequency (2-
1
(bipolar) track)
l
Input X8 Terminals Input X5
Digital frequency (bipolar) Digital frequency
track)
Input X5 Terminals Input X8
Digital frequency (bipolar) Pulse encoder
track)
* According the configuration selected, 1 or act. value be
output via the digital frequency output XQ.
4.1 Analog act. value
If you use a DC tachogenerator, you should know the maximum
tacho voltage to be expected. You calculate this tacho voltage
from the ratings of the tacho and the maximum drive
Connect the tacho to input 3, 4, and select the
of the SI, which is required for the maximum tacho
voltage (see page 31).
4.2 Digital act. value
If you use an incremental encoder for act. value, first select the
input for this encoder CO25. To enter the encoder
two are necessaty in general:
l
the value C026.
l
Compensate the C027.
=
Pulses per revolution of the
Pole pair number of the motor
Adjustment (C027) =
Constant (C026)
N a m e Parameter (Factory setting printed in bold) Acceptance
Analog input SH + PRG
Analog input
Analog input
Digital encoder
input X5
Digital
encoder
input X8
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