Magnetek Elevator Quattro DC - Page 51

Quattro DC Drive A1 Submenu
49
The high/low gain switch may be controlled by
either:
 a logic input
 the serial channel
 the gain change level parameter (GAIN CHNG
LEVEL), which defines a percentage of
contract speed
High / Low Gain Example
SPD DEV LO LEVEL and SPD DEV HI
LEVEL
(Speed Deviation Low / High Level)
These two functions are available to indicate
how the speed feedback is tracking the speed
reference.
 Speed Deviation Low – indicates that the
speed feedback is tracking the speed
reference within a defined range.
 Speed Deviation High – indicates that the
speed feedback is failing to properly track
the speed reference.
The Speed Deviation Low function has the
ability to set a configurable logic output. The
logic output will be true, when the speed
feedback is tracking the speed reference within
a defined range around the speed reference
for a defined period of time (see Figure 15).
The defined range is determined by the Speed
Deviation Low Level parameter (SPD DEV LO
LEVEL) and the defined time is determined by
the Speed Deviation Time parameter (SPD
DEV TIME).
The Speed Deviation High function
annunciates a Speed Deviation Alarm, and has
the ability to set a configurable logic output.
The alarm will be annunciated and the logic
output will be true, when the speed feedback is
not properly tracking the speed reference and
is outside a defined range around the speed
reference (see Figure 15). The defined range
is determined by the Speed Deviation High
Level parameter
Figure 15: Speed Deviation Example
Speed Deviation High
(
S
p
eed Deviation Alarm
)
S
p
eed Deviation Low
Speed Deviation High
(
S
p
eed Deviation Alarm
)
S
p
eed Reference
S
p
eed Feedbac
k
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
Quattro 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