Equal, Not Equal, Greater Or Equal, Greater Than, Less Or Equal, Less Than - GE PACSystems RX7i Cpu Programmer's Reference Manual

Chapter 5. Function Block Diagram (FBD)
5.5.1 Equal, Not Equal, Greater or Equal, Greater Than, Less or Equal,
Less Than
The relational functions compare input IN1 to input IN2. These operands must be the same data
type. If inputs IN1 and IN2 are equal, the function outputs the result to Q, unless IN1 and/or IN2 is
NaN (Not a Number). The following relational functions can be used to compare two numbers:
Tip: To compare values of different data types, first use conversion functions to make the types
the same.
Operands
Parameter Description
Solve Order Calculated by the FBD editor.
IN1 The first value to be compared;
the value on the left side of the
relational statement.
IN2 The second value to be compared;
the value on the right side of the
relational statement. IN2 must be
the same data type as IN1.
If the relational statement is true,
Q
Q=1.
246 PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual
Function Definition
EQ Equal
NE Not Equal
GE Greater Than or Equal
GT Greater Than
LE Less Than or Equal
LT Less Than
Allowed Types
NA
BOOL (for EQ and NE
functions only), BYTE, DINT,
DWORD, INT, REAL, LREAL,
UINT, WORD
BOOL
Bit reference in a non-BOOL
variable.
Relational
Statement
IN1=IN2
IN1≠IN2
IN1≥IN2
IN1>IN2
IN1≤IN2
IN1<IN2
Allowed Operands
NA
All except S, SA, SB,
SC
I, Q, G, M, T, SA, SB, SC
All except constants.
Optional
No
No
No
No
GFK-2950C