Control Techniques Commander SE Advanced User's Manual page 90

This menu contains a programmable threshold and a variable selector. The programmable threshold can be used to change
the drives action or output a signal at a predetermined level of the input signal. For example it can be used to change a ramp
rate at a pre-programmed frequency. The variable selector allows the user to be able to set up two different values for a
particular parameter and switch between them.
Viewing the block diagram of Menu 12 will help in understanding the functions of the following parameters.
See Chapter 12 Applications for threshold detector and variable selector set up examples.
12.01
This parameter indicates whether the threshold input variable is above (1) or below (0) the programmed threshold.
12.02
12.03
0.00 ~ 21.51
*Units: Menu.Parameter
Defines the parameter to be input to the programmable threshold.
The absolute value of the source variable is taken as input to the threshold comparator. Only non-bit parameters can be
programmed as a source. If a non valid parameter is programmed the input value is taken as 0.
12.04
0.0 ~ 100.0
This is the user defined threshold level entered as a percentage of the source maximum.
12.05
0.0 ~ 25.0
This parameter defines the band within which no change will occur on the output. The upper limit for switching is therefore
Level + Hyst/2 and the lower level will be Level - Hyst/2.
12.06
This parameter is used to invert the logic state of the threshold output if required.
12.07
0.00 ~ 21.51
*Units: Menu.Parameter
This parameter defines the parameter which is to be controlled by the threshold comparator. Only Bit parameters which are
not protected can be setup as a destination. If a non valid parameter is programmed the output is not routed anywhere.
12.08
12.09
0.00 ~ 21.51
*Units: Menu.Parameter
Defines the parameters which are to be switched by the variable selector block. These can be bit variables or non bit
variables but not a mixture of both. Also the output parameter programmed must be the same type as the destination
parameter, if not they are always read as zero. Please be aware when programming a reference to a variable source select,
if the reference is a percentage, then the variable source treats the percentage as a whole number e.g. 50.0% of reference =
50.0Hz.
90
Threshold detector output indicator
0 or 1
Unused parameter
Threshold detector source
0.0
Threshold detector level
0
Threshold detector hysteresis
0
Threshold detector output invert
0 or 1 0
Threshold detector destination
0.00
Variable selector source 1
Variable selector source 2
0.00
RO Bit
*
RW Uni
% RW Uni
% RW Uni
RW Bit
*
RW Uni R
*
RW Uni R
Commander SE Advanced User Guide
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Issue Number: 4