Burkert Type 1110 - Handbuch (Seite 78)

76 - 1110
DIGITAL INDUSTRIAL CONTROLLER
english
Controller output/output signal Tune Adaption
continuous standard signals 0 ... 10 V x x
continuous standard signals 0 ... 20 mA x x
continuous standard signals 4 .. 20 mA x x
2-point PWM signals x
3-point PWM signals x
3-point step signals with internal feedback x
3-point step signals with external feedback x
Includable controller outputs
The tune and adaption modules can be used for controller outputs or output signals
as listed in the following table:
Includable controller structures
The tune and adaption functions can be used for the following control structures:
• Standard controller
• Feed forward control
• Cascade control
The tune and adaption modules optimise the parameters of PI and PID controller
structures. A P controller structure that produces a lasting system deviation in the
stationary state in control systems with compensation is not optimised directly, but is
converted to a PI structure.
If only the two PI parameters
proportional action coefficient Kp and reset time Tr
( derivative action time Td = 0) are specified as starting parameters before
commencing tuning or adaption, a PI controller structure is optimised. If optimisation
of a PID structure is required, Td = 0.1 sec. must be set as the starting value for the
derivative action time.
While the tune function involves direct calculation of controller parameters, i.e.
independently of the starting parameters, the suitable choice of starting parameters
is important with regard to the
adaption function. That is to say, the respectively
current controller parameters form the basis for the individual optimisation steps.
This is why you are advised to activate the tuning function when commissioning the
controller for the first time, thus arriving at a suitable set of starting parameters for
use of the adaption module.