Function Block - Down-counting stop watch.
Inputs
|
Input |
Data Type |
Range |
Unit |
Default |
Description |
|---|---|---|---|---|---|
|
IN |
BOOL |
FALSE, TRUE |
|
|
The time counts when this input is TRUE. |
|
RST |
BOOL |
FALSE, TRUE |
|
|
Timer is reset to 0 (zero) when this input is TRUE. |
|
PT |
TIME |
|
|
|
Programmed time. |
Outputs
|
Input |
Data Type |
Range |
Unit |
Description |
|---|---|---|---|---|
|
Q |
BOOL |
FALSE, TRUE |
|
Timer elapsed output signal. |
|
ET |
TIME |
|
Elapsed time. |
Remarks
- The timer counts up when the IN input is TRUE.
- It stops when the programmed time is elapsed.
- The timer is reset when the RST input is TRUE.
- It is not reset when IN is false.
Time Diagram
Figure 1: Time Diagram
FBD Language Example
FFLD Language Example
IL Language Example
(* MyTimer is a declared instance of TMD function block *)
Op1: CAL MyTimer (IN, RST, PT)
FFLD: MyTimer.Q
ST: Q
FFLD: MyTimer.ET
ST: ET
ST Language Example
(* MyTimer is a declared instance of TMD function block *)
MyTimer (IN, RST, PT);
Q := MyTimer.Q;
ET := MyTimer.ET;
See Also
