ET_StatusAutoTune

Overview

Type:

Enumeration

Available as of:

V1.0.1.0

Description

The enumeration ET_StatusAutoTune specifies the status information provided by the auto-tuning algorithm for the different function blocks as indicated in the following table.

The enumeration ET_ParameterSetPID specifies the different types of the PID parameter set.

Also refer to chapters Auto-Tuning (Heating) - FB_HeatingControl and Auto-Tuning (Heating) - FB_HeatingControl2.

Enumeration Elements

Name

Data type

Value

Description

Inactive

INT

0

For FB_HeatingControl and FB_HeatingControl2:

Auto-tuning not active. (Default value)

InProgress

INT

1

For FB_HeatingControl:

Auto-tuning is in progress.

CompletedSystemOk

INT

2

For FB_HeatingControl:

Auto-tuning is finished and the system comparison detected a balanced system.

CompletedSystemOversized

INT

3

For FB_HeatingControl:

Auto-tuning is finished and the system comparison detected an oversized system.

In this case, the calculated PID parameters may not be applicable. Enter parameters manually or execute auto-tuning again with adjusted values.

Also refer to System Comparison After Auto-tuning.

CompletedSystemUndersized

INT

4

For FB_HeatingControl:

Auto-tuning is finished and the system comparison detected an undersized system.

In this case, the calculated PID parameters may not be applicable.

Enter parameters manually or execute auto-tuning again with adjusted values.

WaitingForStartCondition

INT

10

For FB_HeatingControl2:

Auto-tuning has been enabled with i_xAutoTune but the conditions to start heating do not apply. The present process value (i_rProcessValue) must be at least 10 °C below the given set point (i_rSetPoint).

For further information, refer to Auto-Tuning (Heating) - FB_HeatingControl2.

HeatingUpPhase

INT

11

For FB_HeatingControl2:

The heating power has reached 100%. The system delay time (Tu) is determined.

Also refer to System Comparison After Auto-tuning.

OvershootDetermination

INT

12

For FB_HeatingControl2:

The overshoot as a function of the heating energy is determined.

CoolingDownPhase

INT

13

For FB_HeatingControl2:

Cooling phase to determine the system compensation time (Tg).

Also refer to System Comparison After Auto-tuning.

PoorlyManagable

INT

14

For FB_HeatingControl2:

The ratio of Tg (system compensation time) to Tu (system delay time) is less than 3.

Also refer to System Comparison After Auto-tuning.

ModeratelyManagable

INT

15

For FB_HeatingControl2:

The ratio of Tg (system compensation time) to Tu (system delay time) is within the range of 3...10.

Also refer to System Comparison After Auto-tuning.

WellManagable

INT

16

For FB_HeatingControl2:

The ratio of Tg (system compensation time) to Tu (system delay time) is equal to or greater than 10.

Also refer to System Comparison After Auto-tuning.