n QD is set to "1", if 0 ≥ CV (Current count smaller/= 0)n else QU = "0"Current countn possible values: -32 768 ... 32 76714.2.4 SFB 3 - TP - Create pulseThe SFB 3 can be used to generate a pulse with a pulse duration equal to PT. Here youhave the following characteristics:n The pulse duration is only available in the STARTUP and RUN modes.n The pulse is started with a rising edge at input IN.n During PT time the output Q is set regardless of the input signal.n The ET output provides the time for which output Q has already been set. The max-imum value of the ET output is the value of the PT input. Output ET is reset wheninput IN changes to "0", however, not before the time PT has expired.n When it is necessary that the instances of this SFB 3 are initialized after a restart,then the respective instances must be initialized in OB 100 with PT = 0 ms.Parameter Declaration Data type Memory block DescriptionIN INPUT BOOL I, Q, M, D, L, constant Start inputPT INPUT TIME I, Q, M, D, L, constant Pulse durationQ OUTPUT BOOL I, Q, M, D, L, Status of the timeET OUTPUT TIME I, Q, M, D, L, Expired timeStart input:The pulse is started by a rising edge at input IN.Pulse duration:CVDescriptionTime diagramParametersINPTVIPA SPEED7 Integrated StandardSystem Function Blocks > SFB 3 - TP - Create pulseHB00 | OPL_SP7 | Operation list | en | 18-30 733
