Application example for Quantum

Introduction

To precisely monitor the output values, it is advisable to implement the scaling with two EFBs. The first EFB (scaling EFBs) scales the analog value and the second EFB monitors the scaled value for ranges preset by the process. In the following process, either the original Y output of the scaling EFB or the limited OUT output of the Limiter EFB can be used.

Application example

A simple example shows how the EFBs can be used.

The example assumes a boiler with a capacity of 350 liters. The input voltage ranges from 0.0 Volt for 0 liters to 10.0 Volt for 1000 liters. A PI controller should guarantee a volume between 200 and 300 liters. The Limiter EFB detects violations in this range and will limit the output.

Given values:

BoilerMn: 0

BoilerMx: 1 000

LowWater: 199

HighWater: 301

Boiler is an unlocated variable of the type and is linked to an AVI030 EFB.

Application example

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)