ACS-CONTROL-SYSTEM GmbH
l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l [email protected]
122
Anhang
Universal Data Manager
122
Formula editor
Enter the desired calculation formula. The formula can be any combination of arithmetic
calculations and logical operations. Analog, digital or already active mathematics channels
can be used.
Formula editor
Navigation
Expert → Application → Maths → Maths x → Formula
Direct access code: 400002-000
x = place holder for selected mathematics channel
A text field with the formula currently used appears. If the field is empty a formula
has not yet been defined for the mathematics channel.
Description
Individual channels can be mathematically linked and calculated with functions. The
mathematics channels calculated in this way are treated as "real" channels, regardless of
whether they are connected conventionally or via fieldbus. Enter the desired calculation
formula. The formula can be any combination of arithmetic calculations and logical
operations. Analog and digital channels can be used, as can mathematics channels that are
already active.
A formula with up to 200 characters can be created using this editor. If the formula is
finished, click OK to close the editor and accept the formula entered. The common entry
and arithmetic operators and inputs are described in detail in the following sections.
Inputs
Inputs are described in the formula using the following syntax:
Input type (signal type;channel number)
Input types:
Type
Description
AI
Analog inputs
DI
Digital inputs
MI
Mathematics inputs
Signal type:
Type
Description
1
Instantaneous value (measured value)
2
State
3
Counter/operational time
5
Validity:
The status of an analog channel or a mathematics channel is relayed.
The relayed value of the function is 0 if:
• The "Cable open circuit" flag is set
• The "Invalid meas. val." flag is set
However the value is not 0 if:
• The "Error value" flag is set
• The "Over range" or "Under range" flag is set
• The "No value available" flag is set
• Limit value flags are set