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Closed-loop User Switches C1
106
By using the gain reduce multiplier, the user can
specify a lower response (gain) for the speed
regulator when the drive is at higher speeds.
The gain reduce multiplier (GAIN REDUCE
MULT(A1)) tells the software how much lower,
as a percentage, the speed regulator response
(gain) should be.
The high / low gain switch determines when the
HPV 600 is in ‘low gain’ mode. In the ‘low gain’
mode, the gain reduce multiplier has an effect
on the speed regulator’s response (gain).
The drive allows for the high / low gain switch to
be controlled either externally or internally. The
high / low gain source parameter (HI/LO GAIN
SRC) allows for this external or internal
selection.
The high / low gain switch can be controlled
externally by either:
•
a logic input
•
the serial channel.
The high / low gain switch can also be controlled
internal by:
•
the gain change level parameter (GAIN
CHNG LEVEL), which defines a percentage
of contract speed.
With the drive set to internal control, the speed
regulator will go into ‘low gain’ mode when the
drive senses the motor is above a defined speed
level. The defined speed level is determined by
the gain change level parameter.
An example of internal high / low gain control is
shown below.
High / Low Gain Example
0%
contract
speed
low gain
mode
Response of
Speed
Regulator
8.0 rad/sec
10%
contract
speed
10%
contract
speed
Response of
Speed Regulator
8.0 rad/sec
HPV 600 Parameter Settings
HI/LO GAIN SRC = internal
GAIN REDUCE MULT = 80%
GAIN CHNG LEVEL = 10 %
RESPONSE = 10.0 rad/sec
Response of
Speed Regulator
10.0 rad/sec
0%
contract
speed
Response of
Speed Regulator
10.0 rad/sec
speed
reference
100%
contract
speed
Содержание HPV 600
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