Structure Data Type Definitions

Structure Data Type Definitions - AnaIput

Overview

Structure data types serve as the major input and output data carriers between different function blocks, configuration, and parameterization data.

The following section lists the names of structures (data types) that are used in this function block, followed by a table that describes the elements of structure.

NOTE: For the structure data types that are used from this function block and others, refer to the Common Structure Data Type Definitions chapter.

NOTE: Select the limits carefully. Any improper values configured here are not detected automatically. They may lead to an interruption of the water flow.

NOTE: Thoroughly test all functions during verification and commissioning.

Structure: stAnaInit

The stAnaInit structure data type contains the initialization data for the AnaIput function block.

Element of stAnaInit	Data Type	Description
wRawValLow	WORD	Contains the minimum raw value.
wRawDigHigh	WORD	Contains the maximum raw value.
rPhyValLow	REAL	Defines the minimum level that is allowed for the scaled value (floating point number). Range: rPhyValLow ≥ 0.0
rPhyValHigh	REAL	Defines the maximum level that is allowed for the scaled value (floating point number). Range: rPhyValHigh > rPhyValLow

Structure: stAnaCtrl

The stAnaCtrl structure data type is used to define the limit and control values.

Element of stAnaCtrl	Data Type	Description
rHiHi	REAL	Defines the highest limit for the scaled value. If this limit is reached, the function block indicates a detected alarm. The function block is disabled and the outputs are set to the default value (0 and FALSE).
rHi	REAL	Defines a high limit for the scaled value. If this limit is reached, the library indicates a detected alert. If you do not want to use this alert function, enter a value that is bigger than the value for rHiHi.
rLo	REAL	Defines a low limit for the scaled value. If this limit is reached, the library indicates a detected alert. If you do not want to use this alert function, enter a value that is bigger than the value for rLoLo.
rLoLo	REAL	Defines the lowest limit for the scaled value. If this limit is reached, the function block indicates a detected alarm. The function block is disabled and the outputs are set to the default value (0 and FALSE).
xLimAct	BOOL	When TRUE, the scaled value is limited to the maximum value defined for the parameter rHiHi and to the minimum value defined for the parameter rLoLo.
tDelAlrm	TIME	Defines the time to elapse (in ms) before an alarm is issued indicating that the scaled value is above or below the configured limits.

Structure: stAnaLim

The stAnaLim structure data type is used to indicate whether the actual scaled value has exceeded a defined limit.

Element of stAnaLim	Data Type	Description
xLimAlrmHigh	BOOL	When TRUE, indicates that a high alarm has been detected. This means that the scaled value is higher than the value defined for the parameter rHiHi.
xLimAlrtHigh	BOOL	When TRUE, indicates that a high alert has been detected. This means that the scaled value is higher than the value defined for the parameter rHi.
xLimAlrmLow	BOOL	When TRUE, indicates that a low alarm has been detected. This means that the scaled value is lower than the value defined for the parameter rLoLo.
xLimAlrtLow	BOOL	When TRUE, indicates that a low alert has been detected. This means that the scaled value is lower than the value defined for the parameter rLo.

Structure: stAnaAlrm

The stAnaAlrm structure data type is used to indicate which type of alarms has been detected.

Element of stAnaAlrm	Data Type	Description
xParaErr	BOOL	When TRUE, indicates that an error in the configuration has been detected. This means that a parameter for a high limit is assigned a lower value than a parameter for a low limit or vice versa. Or the maximum raw value (wRawDigHigh) is assigned a higher value than 32767. After the detected error has been corrected, a cold start is required.
xWireBrake	BOOL	When TRUE, indicates that a wire break has been detected. This means that the actual raw value is 10% below the value configured for the minimum raw value (wRawValLow).
xLimAlrm	BOOL	When TRUE, indicates that the scaled value is higher or lower than the values defined for stAnaCtrl.rHiHi and stAnaCtrl.rLoLo.

Element of stAnaAlrm

Data Type

Description

xParaErr

BOOL

When TRUE, indicates that an error in the configuration has been detected. This means that a parameter for a high limit is assigned a lower value than a parameter for a low limit or vice versa. Or the maximum raw value (wRawDigHigh) is assigned a higher value than 32767.

After the detected error has been corrected, a cold start is required.

xWireBrake

BOOL

When TRUE, indicates that a wire break has been detected. This means that the actual raw value is 10% below the value configured for the minimum raw value (wRawValLow).

xLimAlrm

BOOL

When TRUE, indicates that the scaled value is higher or lower than the values defined for stAnaCtrl.rHiHi and stAnaCtrl.rLoLo.