NORD Drivesystems BU0550 - Manual (Page 49)

3 AWL (Instruction List, IL)
BU 0550 GB-0813 49
3.5.1.9 TP time pulse
With a positive flank on IN the timer is started with the value 0. The timer counts up to the value entered in
PT and then stops. This process cannot be interrupted! PT can be changed during counting. Output Q is
TRUE, as long as the timer ET is less than PT. If ET = PT and a rising flank is detected on IN the timer is
restarted at 0.
Here, literals can be used for simplified input, e.g.

LD TIME#50s20ms = 50.020 seconds

LD TIME#1d30m = 1 day and 30 minutes
IN
Q
PT
ET
Table 67 TP time pulse
NOTE
The time ET runs independently from the PLC cycle. Starting of the timer with IN and setting of
the output Q is only executed with the function call-up "CAL". The function call-up takes place
within a PLC cycle. However, with PLC programs which are longer than 5 ms this may result in
the occurrence of jitter.
VAR_INPUT VAR_OUTPUT
Input Explanation Type Output Explanation Type
IN Timer active BOOL Q TRUE

( ET < PT ) BOOL
PT Duration DINT ET Current timer reading DINT