CMP
Inputs
Input |
Data Type |
Range |
Unit |
Default |
Description |
---|---|---|---|---|---|
IN1 |
DINT |
|
|
|
First value. |
IN2 |
DINT |
|
|
|
Second value. |
Outputs
Output |
Data Type |
Range |
Unit |
Description |
---|---|---|---|---|
EQ |
BOOL |
|
|
TRUE if IN1 = IN2. |
GT |
BOOL |
|
|
TRUE if IN1 > IN2. |
LT |
BOOL |
|
|
TRUE if IN1 < IN2. |
Remarks
None
FBD Language Example
FFLD Language Example
- The rung input (EN) validates the operation.
- The rung output is the result of LT (lower than) comparison).
- The comparison is executed only if EN is TRUE.
IL Language Example
(* MyCmp is declared as an instance of CMP function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. block *)
Op1: CAL MyCmp (IN1, IN2)
LD Ladder diagram - This is a method of drawing electrical logic schematics. It is a very popular graphical language for programming Programmable Logic Controllers (PLCs). It was originally invented to describe logic made from relays. The name is based on the observation that programs in this language resemble ladders, with two vertical rails and a series of horizontal rungs between them. MyCmp.LT
ST bLT
LD MyCmp.EQ
ST bEQ
LD MyCmp.GT
ST bGT
ST Language Example
(* MyCmp is declared as an instance of CMP function block. *)
MyCMP (IN1, IN2);
bLT := MyCmp.LT;
bEQ := MyCmp.EQ;
bGT := MyCmp.GT;
See Also