Specify the timer parameters in the format of tags. In Ladder
Diagrams, tags (variables) are used for representing all inputs, outputs, and internal
memory with attributes such as Data Type, Initial
Value, and size. To change the attributes of the
Operand Tag, open the Program Variables table
within the Ladder Diagram Program block. The Data Type
of the timer tag is of the Bus:TIMER type with its initial value
specified as a structure containing the following fields:
| Field | Description | Default Value |
|---|
PRE | The preset value specifies the value (1 millisecond units) which
the accumulated value must reach before the instruction indicates it is
done | 0 |
ACC | The accumulated value specifies the number of milliseconds that
have elapsed since the TON instruction was
enabled. | 0 |
EN | The enable bit contains rung-condition-in when the instruction was
last executed. | 0 |
TT | The timing bit when set indicates the timing operation is in
process. | 0 |
DN | The done bit when set indicates the timing operation is complete
(or paused). | 0 |
Programmatic Use
Block Parameter:
PLCOperandTag |
| Type: character vector |
| Value: character vector |
Default: 'T' |
