Pilz PSENvip RL D P - Manual (Page 45)

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Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
4-17
4.4 Description of the units
4 Function Description
Testing for shorts
 A test is regularly carried out to check for shorts between the outputs.
Fig. 4-7: Test pulses
Key:
 t
1
: Pulse length of on test (40 μ s)
 t
2
: Repetition length of on test (100 μ s ... 3 ms)
 t
3
: Cycle time of on test (30 μ s ... 5 min)
][Funktionsbeschreibung_BA_Zusatz Einschalttest
Funktion_Geraete_Empfaenger_Ausgang_NLW  Overrun measurement
Safe output that reports the result of the measurement of the overrun
to the programmable safety system.
Overrun measurement = 1: Overrun within the specified range
Overrun measurement = 0: Overrun outside the specified range.
Overrun is too long.
The overrun is measured each time the protected field is interrupted.
The overrun measurement output is set to “0” as soon as the protect-
ed field has been cleared.
Funktion_Geraete_Empfaenger_Ausgang_Zusatz
WARNING!
When wiring an output with capacitance it is essential to note
the pulse duration, repetition period and scan time of the power-
up test, otherwise the load may switch on unintentionally.
INFORMATION
The outputs for overrun measurement have another function
during the system status TEST. They are used for communica-
tion with the safety system. See "Communication with a safety
system" in this section.
1
t2 t1 t1 t3 t1
t
t2 t1
U
0