Reset CEI timer Tp Pulse

Hello,

I am using a ET200 CPU IM 151-8 PN/DP CPU V3.2, I want to use the CEI timers, TP PULSE.

But I want to reset it while running, in the S7 1200 there is a function ----(RT)--| that resets the iec timer, if a use a S5 timer I can reset it with the normal Reset coil,

But, with the CEI timers and ET200 I can not found how to reset a TP PULSE timer while running.

Thanks in advance to all the comunity...

Hi Enrique,

There is no reset while running

Here you can see the description of SFB3 "TP" from S7-Help

Description

SFB 3 "TP" generates a pulse with the length PT. The timer runs only in the STARTUP and RUN modes.

A rising signal edge at input IN starts the pulse. Output Q remains set for the time PT regardless of changes in the input signal (in other words even when the IN input changes back from 0 to 1 before the time PT has expired).The ET output provides the time for which output Q has already been set. The maximum value of the ET output is the value of the PT input. Output ET is reset when input IN changes to 0, however, not before the time PT has expired.

SFB 3 "TP" complies with the IEC 1131-3 standard.

The operating system resets the instances of SFB 3 "TP" during a cold restart. If you want instances of this SFB to be initialized following a warm restart, you must call SFB 3 with PT = 0 ms in OB100. If instances of this SFB are located within another block, you can reset these instances, for example, by initializing the higher-level block.

 What do you want to do? maybe we can help you to realize it

regards

mopS04

Hi Enrique,

There is no reset while running

Here you can see the description of SFB3 "TP" from S7-Help

 Hello and thanks for your reply,

I want to reset it during the normal running of the CPU, for example, extend the valve actuation for a while, but cancel this extended duration if required do the opossite movement.

Hello,

I found a solution:

If a move a 0 to the internal DB tag STIME, it stops.... as can be seen in the screen capture.

I found another solution. Just use --(RT) function with timer's instance DB as parameter

Tested in S7-1500.

The function [RT] worked me wonderfully. Thank you very much dear

doloemanuel

The function [RT] worked me wonderfully. Thank you very much dear

 How do I invoke the [RT] function?  I cannot seem to find it.