Kübler SMC1.3, Safety Manual

Page: 187 / 235

R60047.0002 - Index 2 EN – page 67 / 115
12.4 Standstill (Switch Mode = 3)
With parameter setting “Switch Mode” = 3, the frequency is monitored for standstill. The
function is always active. The output is set after detection of frequency 0 Hz and
expiration of the standstill time. When a frequency different from zero is detected, the
output will be reset. Parameter “Wait Time” determines the threshold under which a
frequency is taken as zero.
Relevant Parameters Remark
„Switch Mode “
= 3
„Pulse Time “
statically = 0 or pulse duration in x seconds
„Standstill Time“ standstill time in x seconds
„Output Mode“ homogenous or inverse output configuration (affects the Safety Integrity
Level SIL/PL)
Relevant input functions Remark
none none
Example:
With a Wait Time setting of 0.01 seconds, all frequencies < 100 Hz will be taken as zero (f
= 0).
The expiration of Standstill Time starts as soon both channels report 0 Hz. When this
time has expired and both frequencies are still 0 Hz, the standstill output will be set. As
soon one of the two frequencies becomes different from zero again, the standstill
output will be reset.