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ifm
Programming Manual
ecomatmobile
CabinetController (CR0301) Runtime System V05
2016-04-21
ifm function elements
ifm function elements for the device CR0301
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Parameters of the inputs
348
Parameter
Data type
Description
X
WORD
input value
XS
WORD
preset value
XMAX
WORD
maximum preset value
KP
Byte
constant of the proportional component (/10)
(positive values only!)
TN
TIME
integral action time (integral component)
KD
BYTE
differential component (/10)
(positive values only!)
TV
TIME
derivative action time (differential component)
SO
BOOL
TRUE:
self-optimisation active
FALSE:
self-optimisation not active
RESET
BOOL
TRUE:
reset the function element
FALSE:
function element is not executed
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Parameters of the outputs
349
Parameter
Data type
Description
Y
WORD
Manipulated variable (0...1000 ‰)
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Recommended setting
9127
350
► Select TN according to the time characteristics of the system:
fast system = small TN
slow system = large TN
► Slowly increment KP gradually, up to a value at which still definitely no fluctuation will occur.
► Readjust TN if necessary.
► Add
d
ifferential component only if necessary:
Select a TV value approx. 2...10 times smaller than TN.
Select a KD value more or less similar to KP.
Note that the maximum control deviation is + 127. For good control characteristics this range should
not be exceeded, but it should be exploited to the best possible extent.
Function input SO (self-optimisation) clearly improves the control performance. A precondition for
achieving the desired characteristics:
•
The controller is operated with I component (TN > 50 ms)
•
Parameters KP and especially TN are already well adjusted to the actual controlled system.
•
The control range (X – XS) of ± 127 is utilised (if necessary, increase the control range by
multiplying X, XS and XMAX).
► When you have finished setting the parameters, you can set SO = TRUE.
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This will significantly improve the control performance, especially reducing overshoot.
Summary of Contents for Ecomat 100 Mobile CR0301
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