Description

Original instructions

Function description

The function enables the adjustment of characteristic curves for analog raw values.

3 different adjustments are available:

Linearization with square root (standardized range)
Correction of the "Offset" (zero offset compensation)
Correction of "Range" (gain)

NOTE: Correction of the automatically set values for "Offset" and "Range" is not normally necessary.

and can be configured as additional parameters.

Representation in FBD

Representation:

Representation in LD

Representation:

Representation in IL

Representation:

LD InputChannel
O_FILTER FilterActivFlag, AdjustingOffsets, AdjustingGain
ST OutputChannel

Representation in ST

Representation:

OutputChannel := O_FILTER (InputChannel, FilterActivFlag,
    AdjustingOffsets, AdjustingGain) ;

Parameter description

Description of input parameters:

Parameter	Data type	Meaning
CH_IN	ANL_OUT	Input channel
SQRT	BOOL	Square root filter 1: Filter active 0: Filter inactive
OFFS_ADJ	INT	Adjusting offset
RNGE_ADJ	INT	Adjusting gain

Description of output parameters:

Parameter	Data type	Meaning
CH_OUT	ANL_OUT	Output channel

Runtime error

An error message is returned if the input channel has not been configured. In this case, please check the connected I/O module EFB.

NOTE: For a list of all block error codes and values, seeAnalog I/O Configuration .

EN stands for ENable; it is an optional block input. When the EN input is enabled, an ENO output is set automatically.

If EN = 0, the block is not enabled; its internal program is not executed, and ENO is set to 0.

If EN = 1, the block's internal program is run and ENO is set to 1. If an error occurs, ENO is set to 0.

If the EN input is not connected, it is set automatically to 1.

ENO

ENO stands for Error NOtification; this is the output associated with the optional input EN.

If ENO is set to 0 (because EN = 0 or in case of an execution error):

the status of the function block outputs remains the same as it was during the previous scanning cycle that executed correctly;
the output(s) of the function, as well as the procedures, are set to "0".

ANL_OUT

ANL_OUT is an internal data type that is used between Quantum specific FFBs. For instance, an ACO130 FFB provides the channel structures of the module as ANL_OUT types, which are used as input of an O_PHYS FFB. This data type must not be used outside the Quantum specific FFBs.

Elements of the DDT:

Name	Type	Comment
valuePtr	UDINT	3x or 4x raw value register
rawControl	BYTE	Control Byte(internal use only)
rawSpecific	BYTE	Specific Byte (internal use only)
offset	INT	Offset Value
range	WORD	Input range (resolution)
channel	BYTE	Input Channel number
statusMode	BYTE	Status Mode (internal use only)
statusPtr	UDINT	Identifies high byte or low byte of status register
warnCode	BYTE	Warning Code (internal use only)

BOOL

BOOL is the abbreviation for the Boolean type. This is the basic data type in computing. A BOOL variable can have either of the following two values: 0 (FALSE) or 1 (TRUE).

A bit extracted from a word is of type BOOL, for example: %MW10.4.

INT

INT is the abbreviation of single INTeger (encoded in 16 bits).

The upper/lower limits are as follows: -(2 to the power of 15) to (2 to the power of 15) - 1.

Example:

-32768, 32767, 2#1111110001001001, 16#9FA4.