Scaling EFBs

Introduction

The analog values are scaled using the EFBs of the Analog IO Configuration block library family in the scaling sections.

The analog I/O EFBs operate hardware independently with the data types and .

Scaling EFBs available

The following scaling EFBs are available:

I_RAW, I_RAWSIM, O_RAW:

Raw value, no scaling
I_NORM, I_NORM_WARN, O_NORM, O_NORM_WARN:

Normalization, representation in a range from 0.0 to 1.0
I_PHYS, I_PHYS_WARN, O_PHYS, O_PHYS_WARN:

Physical, physical range
I_SCALE, I_SCALE_WARN, O_SCALE, O_SCALE_WARN:

Scaled, representation in a user-defined range from MN to MX

Handy tips

Please take note of the following tips about using scaling EFBs:

When using these EFBs, the messages in Tools → Diagnostic viewer should definitely be observed. That is where execution errors for these EFBs are recorded.
For tasks not requiring the physical units and/or only scaling by 0-100% the NORM EFB are preferred to the PHYS or SCALE EFBs.
If scaling is required, the PHYS EFB should be used. PHYS EFBs do not work without information about the physical units however, for these the SCALE EFBs are used.
SCALE EFBs can also be used if physical scaling is not required or is not possible.
SCALE EFBs do not work in conjunction with input/output modules which provide direct physical values (e.g. decimal values). This applies, for example, to temperature or resistance modules not set to raw values (see parameter dialog box in the IO map).
EFBs with WARN cannot be used for all input/output modules. The descriptions of the individual EFBs explains which modules they can be used with.
"Open circuit" is categorized as an error rather than a warning. "Open circuit" generates an online error message which can be accessed using Tools → Diagnostics viewer and sets the output ENO of the WARN EFBs to "0".
The RAW EFB is not usually required. It merely represents a simple way to make additional use of the raw values.

ANL_IN

ANL_IN is an internal data type that is used between Quantum specific FFBs. For instance, an ACI040 FFB provides the channels structures of the module as ANL_IN types, which are used as input of an I_FILTER 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)

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)