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User Manual
GFK-1503F
10.6.1
Relational Functions Equal, Not Equal, Less Than,
Less/Equal, Greater Than, Greater/Equal
Parameters for the Relational Functions
Input/
Output
enable
IN1
IN2
Q
Example
In the example, two double precision signed integers are tested for equality. When the relay
%I0001 passes power flow to the LE (Less or Equal) function, the value presently in the
reference nicknamed PWR_MDE is compared to the value presently in the reference
BIN_FUL. If the value in PWR_MDE is less than or equal to the value in BIN_FUL, coil %Q0002
is turned on.
Figure 138
10.6.2
Relational Functions Range
The Range function determines if a value is within the range of two numbers.
Data Types for the Range Function
The Range function operates on these types of data:
INT
DINT
WORD
Instruction Set Reference
Choices
Description
flow
When the function is enabled, the operation is performed.
R, AI, AQ, constant
IN1 contains a constant or reference for the first value to be
compared. IN1 must be a valid number. Constants must be
For INT data only: I,
integers for double precision signed integer operations.
Q, M, T, G
IN1 is on the left side of the relational equation, as in IN1 < IN2.
R, AI, AQ, constant
IN2 contains a constant or reference for the second value to be
compared. IN2 must be a valid number. Constants must be
For INT data only: I,
integers for double precision signed integer operations.
Q, M, T, G
IN2 is on the right side of the relational equation, as in IN1 < IN2.
flow, none
Output Q is energized when IN1 and IN2 match the specified
relation.
Signed integer (default).
Double precision signed integer.
Word data type.
Chapter 10
Jan 2020
152
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