Function Block Description

Function Block Description - CompSp

Pin Diagram

Brief Description

When the stage value changes, the CompSp function block helps to reduce friction loss by adapting the pressure setpoint considering the number of the pump demand. The steepness of the adaptation is limited by using a ramp function.

I/O Variables Description

The table describes the input/output variables of the function block:

Input/Output	Data Type	Description
iq_stAlrmCtrl	stAlrmCtrl	Structure used for alarm handling. Refer to the structure data type description.
iq_stOpMode	stOpMode	Determines the operating modes. If the element xAuto of the structure data type stOpMode is set to TRUE, the function block executes its tasks automatically. With another status of this element, the outputs of this function block are set to their defined fallback (default) states. Refer to the structure data type description.
iq_stCompInit	stCompInit	Structure used for initialization data for the compensation function. Refer to the structure data type description.

Input/Output

Data Type

Description

iq_stAlrmCtrl

stAlrmCtrl

Structure used for alarm handling. Refer to the structure data type description.

iq_stOpMode

stOpMode

Determines the operating modes.

If the element xAuto of the structure data type stOpMode is set to TRUE, the function block executes its tasks automatically. With another status of this element, the outputs of this function block are set to their defined fallback (default) states. Refer to the structure data type description.

iq_stCompInit

stCompInit

Structure used for initialization data for the compensation function.

Refer to the structure data type description.

The table describes the input variables to the function block:

Input	Data Type	Description
i_xRele	BOOL	Activates (TRUE) or stops (FALSE) the execution of the function block.
i_rSp	REAL	Contains the user-defined pressure setpoint and can be adapted by this function, or the pipe fill, or the cavitation protection function.
i_stStagVal	stStagVal	Structure of the stage value provided by the PumpPidStag function block. It indicates the number of pumps that is needed to generate sufficient power to maintain the pressure level. The CompSp function block will increase the pressure setpoint (i_rSp) by the respective correction values (iq_stCompInit.rCorrPump(n)) for the number of pumps requested by the stage value. Refer to the structure data type description.

Input

Data Type

Description

i_xRele

BOOL

Activates (TRUE) or stops (FALSE) the execution of the function block.

i_rSp

REAL

Contains the user-defined pressure setpoint and can be adapted by this function, or the pipe fill, or the cavitation protection function.

i_stStagVal

stStagVal

Structure of the stage value provided by the PumpPidStag function block. It indicates the number of pumps that is needed to generate sufficient power to maintain the pressure level.

The CompSp function block will increase the pressure setpoint (i_rSp) by the respective correction values (iq_stCompInit.rCorrPump(n)) for the number of pumps requested by the stage value.

Refer to the structure data type description.

The table describes the output variable from the function block:

Output	Data Type	Description
q_stRef_Sp	stRef	Contains the adapted pressure setpoint and the state of this value. Refer to the structure data type description.

Output

Data Type

Description

q_stRef_Sp

stRef

Contains the adapted pressure setpoint and the state of this value.

Refer to the structure data type description.