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 12
Mentor MP Advanced User Guide 165
Issue Number: 4 www.controltechniques.com
The sample time for this function is 4 ms x number of menu 9 and 12 functions active. Extending the sample time does not cause any overflow errors
within the function however, care must be taken to ensure that the input or output positions do not change by more than half a revolution within the
sample time, i.e for a sample time of 4 ms the input or output speed should not exceed 7500 rpm, for a sample time of 8 ms the speed should not
exceed 3750 rpm, etc. If the output of this function is to supply a reference to the position controller in menu 13 it must be the only user function in
menu 9 or 12 enabled. If another function is enabled the input to the position controller will only change every 8 ms (i.e. every 2 samples of
the position controller) and the speed reference applied to the drive could be very noisy.
The following diagram shows how the variable selector in Sectional control mode can be used to provide a position reference for the drive and act as
a source for encoder simulation to give the position reference for the next drive in the system.
The input reference is provided by the previous drive in the system via the SM-Universal Encoder Plus module and is used as the position source
(Pr 12.08) for the variable selector. The destination of the variable selector is the local position reference for the menu 13 position controller
(Pr 13.21). Pr 13.21 counts up or down based on the delta position from the variable selector and rolls over or under at 65535 or 0. If the controller is
set up to ignore the local reference turns then Pr 13.21 can be used as the position controller reference.
If Pr 13.21 is also used as the encoder simulation source the local reference can also be used to give the reference for the next drive in the system.
With this arrangement a ratio is provided between the input reference and output reference within the variable selector. An addition ratio can be
provided within the position controller between the position in Pr 13.21 and the position reference used by the position controller. The variable
selector speed reference can be used to move the position reference forwards or backwards with respect to the input reference.
5.13.3 Brake control function
The brake control function can be used to control an electro-mechanical brake via the drive digital I/O.
This parameter should be used as a source for a digital output to control an electro-mechanical brake. This parameter is one to release the brake and
zero to apply the brake. Digital I/O can be automatically configured to use this parameter as a source (see Pr 12.41).
0 = dis
The brake controller is disabled and no other drive parameters are affected by the brake controller. When this parameter is changed from a non-zero
value to zero the following parameters are set to zero: Pr 2.03, Pr 6.08, Pr 13.04 and Pr 13.10 (if Pr 12.49 = 1).
1 = rel
The brake controller is enabled with I/O set up to control the brake via the relay output T51/T52. Drive OK is re-routed to digital I/O 2 (T25).
2 = d IO
The brake controller is enabled with I/O set up to control the brake via digital I/O 2 (T25).
3 = User
The brake controller is enabled, but no parameters are set to select the brake output.
The following tables show the automatic parameter changes that occur to set up digital I/O2 (T25) and the relay output (T51/52) after drive reset when
Pr 12.41 has been changed. The changes are done in two stages: the first stage restores the I/O used as defined by the initial setting of Pr 12.41 and
the second stage sets up the I/O as defined by the new setting of Pr 12.41.
12.40 Brake release
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Update rate Background read
12.41
Brake controller enable
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 3
Default 0
Update rate Read on drive reset
Input
reference
Output
reference
SM-Universal
Encoder Plus
module
Source
Pr =Pr
12.08 x.05
Variable selector
in sectional control
mode
Destination
Pr = Pr
12.11 13.21
Menu 13 position controller
Reference source
Pr =Local(4)
Ignore local reference turns
Pr =1
13.04
13.24
Encoder simulation source
Pr = Pr
x.24 13.21

Control Techniques Mentor MP Specifications

General

Brand	Control Techniques
Model	Mentor MP
Category	DC Drives
Language	English