STACKINT
Function Block - Manages a stack of DINT integers.
Inputs
|
Input |
Data type |
Description |
|
PUSH |
BOOL |
Command: when changing from FALSE to TRUE, the value of IN is pushed on the stack. |
|
POP |
BOOL |
Pop command: when changing from FALSE to TRUE, deletes the top of the stack. |
|
R1 |
BOOL |
Reset command: if TRUE, the stack is emptied and its size is set to N. |
|
IN |
DINT |
Value to be pushed on a rising pulse of PUSH. |
|
N |
DINT |
Maximum stack size - cannot exceed 128. |
Outputs
|
Output |
Data type |
Description |
|
EMPTY |
BOOL |
TRUE if the stack is empty. |
|
OFLO |
BOOL |
TRUE if the stack is full. |
|
OUT |
DINT |
Value at the top of the stack. |
Remarks
Push and pop operations are performed on rising pulse of PUSH and POP inputs. In LD language, the input rung is the PUSH command. The output rung is the EMPTY output.
The specified size (N) is taken into account only when the R1 (reset) input is TRUE.
ST Language
MyStack is a declared instance of STACKINT function block.
MyStack (PUSH, POP, R1, IN, N);
EMPTY := MyStack.EMPTY;
OFLO := MyStack.OFLO;
OUT := MyStack.OUT;
FBD Language
LD Language
STACKINT |
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IEC 61131-3 Automation platform > Programming - Reference guide > Advanced operations > STACKINT |
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