n QD is set to "1", if 0 ≥ CV (Current count smaller/= 0)
n else QU = "0"
Current count
n possible values: -32 768 ... 32 767
14.2.4 SFB 3 - TP - Create pulse
The SFB 3 can be used to generate a pulse with a pulse duration equal to PT. Here you
have 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 when
input 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 Description
IN INPUT BOOL I, Q, M, D, L, constant Start input
PT INPUT TIME I, Q, M, D, L, constant Pulse duration
Q OUTPUT BOOL I, Q, M, D, L, Status of the time
ET OUTPUT TIME I, Q, M, D, L, Expired time
Start input:
The pulse is started by a rising edge at input IN.
Pulse duration:
CV
Description
Time diagram
Parameters
IN
PT
VIPA SPEED7
Integrated Standard
System Function Blocks > SFB 3 - TP - Create pulse
HB00 | OPL_SP7 | Operation list | en | 18-30 733
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