IFM Electronic Ecomat Mobile Series, Системное руководство

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ifm System Manual ecomat mobile SmartController (CR2500) V05
Controller functions in the ecomatmobile controller General
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11.1.2 Controlled system without inherent regulation
Controlled systems with an amplifying factor towards infinity are referred to as controlled systems
without inherent regulation. This is usually due to an integrating performance. The consequence is that
the control variable increases constantly after the manipulated variable has been changed or by the
influence of an interfering factor. Due to this behaviour it never reaches a final value. These controlled
systems are referred to as I systems (I = integral).
Figure: I controller = controlled system without inherent regulation
11.1.3 Controlled system with delay
Most controlled systems correspond to series systems of P systems (systems with compensation) and
one or several T1 systems (systems with inertia). A controlled system of the 1st order is for example
made up of the series connection of a throttle point and a subsequent memory.
Figure: PT system = controlled system with delay
For controlled systems with dead time the control variable does not react to a change of the control
variable before the dead time T
t
has elapsed. The dead time T
t
or the sum of T
t
+ T
u
relates to the
controllability of the system. The controllability of a system is the better, the greater the ratio T
g
/T
u
.
The controllers which are integrated in the library are a summary of the preceding basic functions. It
depends on the respective controlled system which functions are used and how they are combined.