Download Mounting and Operating Instructions EB 6493 EN

Functions of the compact controller
6.4.2 -CO- SIGN:
Inversion of error XD
This function enables you to reverse the operating direction of the error signal. The inversion
causes an increasing error signal to be changed into a decreasing error signal or vice versa. As
a result, the control signal's operating direction changes, too.
CNTR
-CO- SIGN
Inversion error XD
dir.d XD
Not inverted
in.d XD
Inverted
Note: The adjusted operating direction can also be changed in -CO- DIRE (see section 6.4.6).
6.4.3 -CO- D.PID: Assignment of the derivative-action component to the
control output
In PD and PID controllers, the error signal or the controlled variable can optionally be assigned
as the source for the derivative term.
4 F01 DP.YP: Source for the derivative-action component is the error signal XD. A change
in the controlled variable and set point has an effect on the manipulated variable
through the derivative-action component.
4 F02 DP.YP: Source for the derivative-action component is the controlled variable X. A
change in the controlled variable has an effect on the manipulated variable through the
derivative-action component. A change in the set point is not taken into account by the
derivative-action component.
CNTR
-CO- D.PID
Assignment of D element to the control output
F01 DP.YP
To error
F02 DP.YP
To controlled variable
6.4.4 -CO- CH.CA: Control mode selection P(D)/PI(D)
For PI and PID controllers, the control mode selection enables the controller to be operated in
various operating states with or without the integral term. This function allows the integral term
to be automatically activated by the error signal or by the set point. It can only be selected when
a PI or PID behavior has been configured. Refer to section 6.4.1.
The P(D)/PI(D) control mode selection is preferably to be used when the set point is to start up as
quickly as possible and without overshooting, while no offset is to exist. This is required espe-
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EB 6493 EN