Emerson Powerdrive F300 - Standard Ramp with Motor Voltage Boost

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Powerdrive F300 User Guide 121
Issue Number: 2
2: Standard ramp with motor voltage boost
This mode is the same as normal standard ramp mode except that the
motor voltage is boosted by 20 %. This increases the losses in the
motor, dissipating some of the mechanical energy as heat giving faster
deceleration.
Open-loop
Pr 00.017 sets the destination of digital input T27.
RFC-A / RFC-S
A first order filter, with a time constant defined by Pr 00.017, is provided
on the current demand to reduce acoustic noise and vibration produced
as a result of position feedback quantisation noise. The filter introduces
a lag in the speed loop, and so the speed loop gains may need to be
reduced to maintain stability as the filter time constant is increased.
In modes 2 and 3, a current loop loss trip is generated if the current falls
below 3 mA.
In modes -4, -3, 2 and 3 the analog input level goes to 0.0 % if the input
current falls below 3 mA.
In modes -2 and -1 the analog input remains at the value it had in the
previous sample before the current fell below 3 mA.
Pr 00.020 sets the destination of analog input 1.
In modes 2 and 3, a current loop loss trip is generated if the current falls
below 3 mA.
In modes -4, -3, 2 and 3 the analog input level goes to 0.0 % if the input
current falls below 3 mA.
In modes -2 and -1 the analog input remains at the value it had in the
previous sample before the current fell below 3 mA.
00.017
{08.026}
Digital Input 6 Destination
RW Num DE PT US
OL
Ú
00.000 to 59.999
Ö
06.031
00.017 {04.012} Current Reference Filter Time Constant
RW Num US
RFC-A
Ú
0.0 to 25.0 ms
Ö
1.0 ms
RFC-S
00.019 {07.011} Analog Input 1 Mode
RW Num US
OL
Ú
4-20 mA Low (-4),
20-4 mA Low (-3),
4-20 mA Hold (-2),
20-4 mA Hold (-1),
0-20 mA (0),
20-0 mA (1),
4-20 mA Trip (2),
20-4 mA Trip (3),
4-20 mA (4),
20-4 mA (5), Volt (6),
Therm Short Cct (7),
Thermistor (8),
Therm No Trip (9)
Ö
4-20 mA (4)
RFC-A
RFC-S
DC Bus voltage
Motor Speed
Programmed
deceleration
rate
t
Controller
operational
Pr Value Pr string Comments
-4 4-20 mA Low
4-20 mA low value on
current loss (1)
-3 20-4 mA Low
20-4 mA low value on
current loss (1)
-2 4-20 mA Hold
4-20 mA hold at level before
loss on current loss
-1 20-4 mA Hold
20-4 mA hold at level before
loss on current loss
00-20 mA
1 20-0 mA
2 4-20 mA Trip 4-20 mA trip on current loss
3 20-4 mA Trip 20-4 mA trip on current loss
44-20 mA
5 20-4 mA
6Volt
7 Therm Short Cct
Temperature Measurement
Input With Short Circuit
Detection
8 Thermistor
Temperature Measurement
Without Short Circuit
Detection
9 Therm No Trip
Temperature Measurement
Input With No Trips
00.020 {07.010} Analog Input 1 Destination
RW Num DE PT US
OL
Ú
00.000 to 59.999
Ö
01.036RFC-A
RFC-S
00.021 {07.011} Analog Input 2 Mode
RW Txt US
OL
Ú
4-20 mA Low (-4),
20-4 mA Low (-3),
4-20 mA Hold (-2),
20-4 mA Hold (-1),
0-20 mA (0),
20-0 mA (1),
4-20 mA Trip (2),
20-4 mA Trip (3),
4-20 mA (4),
20-4 mA (5), Volt (6)
Ö
Volt (6)
RFC-A
RFC-S