Control Techniques Mentor MP User Manual

Parameter
structure
Keypad and
display
Parameter x.00
Parameter description
format
Advanced parameter
descriptions
Serial comms
protocol
Performance
Menu 3
Mentor MP Advanced User Guide 53
Issue Number: 4 www.controltechniques.com
0 = 0 ms, 1 = 1 ms, 2 = 2 ms, 3 = 4 ms, 4 = 8 ms, 5 = 16 ms
A sliding window filter may be applied to the feedback taken from the drive encoder. This is particularly useful in applications where the drive encoder
is used to give speed feedback for the speed controller and where the load includes a high inertia, and so the speed controller gains are very high.
Under these conditions, without a filter on the feedback, it is possible for the speed loop output to change constantly from one current limit to the other
and lock the integral term of the speed controller.
The drive encoder reference (Pr 3.45) gives the speed of the encoder input as a percentage of the maximum drive encoder reference provided that
the number of encoder lines per revolution (Pr 3.34 {Fb05, 0.75}) has been set up correctly. This may then be scaled and routed to any non-protected
drive parameter.
The drive encoder input can be used as a reference to control a drive parameter. The drive encoder reference parameter (Pr 3.45) gives the speed of
the encoder input as a percentage of the maximum drive encoder reference provided that the number of encoder lines per revolution (Pr 3.34 {Fb05,
0.75}) has been set up correctly. This may then be scaled and routed to any non-protected drive parameter.
The encoder is re-initialized when this is set to 1 or encoder supplies are restored or a trip reset Pr 3.47 is automatically reset when re-initialization is
complete. To allow detection of non initialized state Pr 3.48 remains zero for 500µs.
3.42
Drive encoder filter
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 5 (0 to16 ms)
Default 2
Update rate Background read
3.43
Maximum drive encoder reference
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range 0 to 10,000 rpm
Default 1000
Update rate Background read
3.44
Drive encoder reference scaling
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
3 111
Range 0.000 to 4.000
Default 1.000
Update rate Background read
3.45
Drive encoder reference
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Range ±100.0 %
Update rate 4 ms write
3.46
Drive encoder reference destination
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 2 1111
Range 00.00 to 22.99
Default 00.00
Update rate Read on reset
3.47 Re-initialise position feedback
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Update rate Background read

Control Techniques Mentor MP Specifications

General

Brand	Control Techniques
Model	Mentor MP
Category	DC Drives
Language	English