model 2704 controller installation and operation handbook - Soliton

Logic Operators
2704 Controller
15. Chapter 15 Logic Operators
Logic Operators allow the controller to perform logical calculations on two input values.
These values can be sourced from any available parameter including Analogue Values, User
Values and Digital Values.
The parameters to use, the type of calculation to be performed, input value inversion and
‘fallback’ value are determined in Configuration level (see Engineering Handbook
HA026933). In levels 1 to 3 you can view the values of each input and read the result of the
calculation.
The Logic Operators page is only available if Analogue and Logic Operators have been
enabled in configuration level. This is described in the Engineering Handbook.
Up to 32 separate calculations can be performed and a separate page header is provided for
each one.
15.1.1. Logic Operations
The following calculations can be performed:
Off
The selected logic operator is turned off
AND
The output result is ON when both Input 1 and Input 2 are ON
OR
The output result is ON when either Input 1 or Input 2 is ON
XOR
Exclusive OR. The output result is true when one and only one
input is ON. If both inputs are ON the output is OFF.
Latch
The output is ON when input 1 turns ON. The output remains ON
when input 1 turns OFF. The output is reset to OFF by turning
input 2 ON.
Equal The output result is ON when Input 1 = Input 2
Greater The output result is ON when Input 1 > Input 2
Less than The output result is ON when Input 1 < Input 2
Greater or Equal The output result is ON when Input 1 > Input 2
Less or Equal The output result is ON when Input 1 < Input 2
Logic input 1
Invert option
Logic input 2
Invert option
Logic operator
See 15.1.1.
Output Value
(result of calculation)
Figure 15-1: Logic Operators
15-2 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00