TMU / TMUsec

 Function Block - Up-counting stop watch (seconds).

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. (TMU)
PTsec	UDINT				Programmed time. (TMUsec - seconds)

Outputs

Input	Data Type	Range	Unit	Description
Q	BOOL	FALSE, TRUE		Timer elapsed output signal.
ET	TIME			Elapsed time. (TMU)
ETsec	UDINT			Elapsed time. (TMU - seconds)

Remarks

TMUsec is identical to TMU except that the parameter is a number of seconds.

• 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 TMU 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 TMU function block *)
MyTimer (IN, RST, PT);
Q := MyTimer.Q;
ET := MyTimer.ET;

See Also

TMD