Digitax HD M753 Control User Guide
51
Issue Number: 3
The output of the ramp controller (when active) is a current demand that
is fed to the frequency changing current controller (Open-loop modes) or
the torque producing current controller (RFC-A or RFC-S modes). The
gain of these controllers can be modified with Pr
00.038
and Pr
00.039
.
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.
Setting Pr
00.016
to 0 allows the user to disable the ramps. This is
generally used when the drive is required to closely follow a speed
reference which already contains acceleration and deceleration ramps.
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.
Defines the fault detection for the P1 thermistor input:
If over temperature detection is enabled a
Thermistor
.001 trip is initiated
if
P1 Thermistor Feedback
(03.119) is above the level defined by
P1 Thermistor Trip Threshold
(03.120). The trip cannot be reset until
P1 Thermistor Feedback
(03.119) is below
P1 Thermistor Reset
Threshold
(03.121).
If short circuit detection is enabled then a
Th Short Circuit
.001 is initiated
if
P1 Thermistor Feedback
(03.119) is below 50 Ohms.
Pr
00.022
determines whether the reference is uni-polar or bi-polar as
follows:
Enter the required value of jog frequency/speed.
The frequency/speed limits affect the drive when jogging as follows:
00.016 {02.002}
Ramp Enable
RW
Bit
US
OL
RFC-A
Off (0) or On (1)
On (1)
RFC-S
00.017 {04.012}
Current Reference Filter Time Constant
RW
Num
US
RFC-A
0.0 to 25.0 ms
0.0 ms
RFC-S
00.018 {03.123}
P1 Thermistor Fault Detection
RW
OL
None (0),
Temperature (1),
Temp and short (2)
None (0)
RFC-A
RFC-S
Temperature (1)
P1 Thermistor Fault Detection
(03.123)
Fault detection
0: None
No detection active
1: Temperature
Over temperature detection
2: Temp and short
Over temperature and short circuit
detection
DC Bus voltage
Motor Speed
Programmed
deceleration
rate
t
Controller
operational
00.022 {01.010}
Bipolar Reference Enable
RW
Bit
US
OL
OFF (0) or On (1)
OFF (0)
RFC-A
RFC-S
Pr 00.022
Function
0
Unipolar speed/frequency reference
1
Bipolar speed/frequency reference
00.023 {01.005}
Jog Reference
RW
Num
US
OL
0.0 to 400.0 Hz
0.0
RFC-A
0.0 to 4000.0 rpm
0.0
RFC-S
Frequency-limit parameter
Limit applies
Pr
00.001
Minimum reference clamp
No
Pr
00.002
Maximum reference clamp
Yes
00.024 {01.021}
Preset Reference 1
RW
Num
US
OL
VM_SPEED_FREQ_
REF
0.0
RFC-A
RFC-S
00.025 {01.022}
Preset Reference 2
RW
Num
US
OL
VM_SPEED_FREQ_
REF
0.0
RFC-A
RFC-S
Summary of Contents for Digitax HD M753 EtherCAT
Page 261: ......
Page 262: ...0478 0461 03...