Functional Safety – Supplementary manual for series SK 500P
44 BU 0630 en-2020
P426 Quick stop time P
Setting of the braking time for the quick stop function which can be triggered either via
a digital input, the bus control, the keyboard or automatically in case of a fault.
The quick stop time is the time which is taken for the linear frequency to decrease
from the set “Maximum frequency” (P105) to 0 Hz. If an actual setpoint < 100 % is
used, the quick stop time is reduced correspondingly.
The quick stop time and the “SS1 max. time” (P423) must be matched to each other.
The set quick stop times for all parameter sets must match the monitoring time.
Danger of injury due to failure of SS1-t
The stopping characteristics of the drive can be influenced by various factors.
Therefore, the “Safe Stop 1” mode may possibly not be correctly complied with.
• The safety subfunction SS1-t must not be used in end applications in which failure
of the SS1-t may result in a hazardous situation.
• In order to prevent malfunction, a final validation in the course of commissioning
must demonstrate that the particular settings fulfil the requirements for the special
intended use, and that the device will at no time be operated outside of its rated
data.
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P428 Automatic start S
Switch-on after an earth fault/short-circuit
Do NOT set this parameter to “On” (P428 = 1
), if Automatic Fault Acknowledgement
(P506 = 6 "always") has been parameterised!
This parameter defines how the FI responds to a static enabling signal when the
mains voltage is applied (mains voltage On).
In the standard setting P428 = 0
Off, the FI requires a flank to enable (signal change
from Low High) at the relevant digital input.
P428 = 1 "On" can be set if the FI must start immediately when the mains vol
tage is
switched on. If the enable signal is permanently switched on, or equipped with a cable
jumper, the FI starts up immediately.
With the setting “On” (P428 = 1) it can only be enabled if the frequency inverter has
been parameterised to local control (P509 = 0 or P509 = 1).
Value Meaning
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The device expects a flank (signal change "low
digital input which has been parametrised to "Enable" in order to
start the drive.
If the device is switched on with an active enable signal (mains
voltage on), it immediately switches to "Switch-on block).
The device expects a signal level ("high") at the digital input which
has been parametrised to "Enable" in order to start the drive.
NOTICE! Danger of injury! Drive starts up immediately!
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