Control Techniques COMMANDER SE, Руководство для продвинутых пользователей

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Commander SE Advanced User Guide
95
Issue Number: 4
This parameter monitors the output of the PID controller before scaling is applied. Subject to the PID output limits the PID
output is given by:
Pe + Ie/s + Des
where:
P , I & D are the programmed gains
e is the input error to the PID
s is the Laplace operator
*Units: Menu.Parameter
These parameters define the variables which are to be used as input variables to the PID controller. Only non-bit parameters
can be programmed as a source. If a non valid parameter is programmed the input value is taken as 0. All variable inputs to
the PID are automatically scaled to variables having the range ±100.0%, or 0 - 100.0% if they are unipolar.
These parameters can be used to invert the PID reference and source variables respectively.
This parameter defines the time taken for the reference input to ramp from 0 to 100.0% following a 0 to 100% step change in
input. Changes from -100.0% to +100.0% will take twice this time.
This parameter must be at 1 for the PID controller to operate, if it is 0 the PID output will be 0. If any changes are made to
14.10 , 14.11 or 14.12 , then the PID Enable must be set to a 0 then set to a 1 for the change to be set.
If the PID loop is disabled. The Integral valve will always be reset to 0.
Only bit parameters can be used as an optional PID enable. If a non valid parameter is programmed the input to the AND
gate is taken as 1. As with the PID enable above, any optional enable programmed must be at 1 for the PID controller to
operate, if it is 0 the PID output will be 0.
This is the proportional gain applied to the PID error. See 14.08 .
14.01 PID controller output
Ú
±100.0
Ö
% RO Bi P
14.02 Main reference source
14.03 PID reference source parameter
14.04 PID feedback source parameter
Ú
0.00 ~ 21.51
Ö
0.00
*
RW Uni P
14.05 PID reference invert
14.06 PID feedback source invert
Ú
0 or 1
Ö
0 RW Bit
14.07 PID reference slew rate limit
Ú
0 ~ 3200.0
Ö
0.0 s RW Uni
14.08 PID enable
Ú
0 or 1
Ö
0 RW Bit
14.09 Optional PID enable source parameter
Ú
0.00 ~ 21.51
Ö
0.00
*
RW Uni P
14.10 PID proportional gain
Ú
0 ~ 2.50
Ö
1.00 RW Uni