ACS-CONTROL-SYSTEM GmbH
l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l [email protected]
123
Universal Data Manager
Anhang
123
Channel number:
Analog channel 1 = 1, analog channel 2 = 2, digital channel 1 = 1, …
Examples:
DI(2;4)
The state of digital channel 4
AI(1;1)
The instantaneous value of analog channel 1
'
Status of a limit value:
LMT (limit number)
The function relays the status of a limit value. The result is 1 if the limit value is violated.
The result is 0 if
• The limit value is not violated
• The limit value is not switched on
• Limiting value monitoring is switched off (e.g. per control input)
Priority of operators / functions
The formula is processed based on universally applicable mathematics rules:
• Parentheses first
• Exponents before multiplication or division
• Multiplication or division before addition or subtraction
• Calculate from left to right
Operators
Arithmetic operators:
Operator
Function
+
Addition
-
Subtraction / negative sign
*
Multiplication
/
Division
Decimal separator
Both the decimal point and the decimal comma can be used in the formula editor.
Thousand separators are not supported.
Check whether formula is valid or malfunctions
A formula is invalid if:
• The channels used are not switched on or are in the wrong operating mode (is not
verified during formula entry as the channel could be switched on subsequently)
• It contains invalid characters/formulas/functions/operators
• Syntax errors (e.g. wrong number of parameters) occur in the formulas
• There are incorrect parentheses in the formula (number of open parentheses unequal to
number of closed parentheses)
• Division is by zero
• A channel refers to itself (infinite recursion)
Invalid formulas are deactivated when the setup is accepted or the device is started.
