Kübler SMC1.3, Safety Manual

Page: 192 / 235

R60047.0002 - Index 2 EN – page 72 / 115
12.9 Frequency < 0 Hz
(Switch Mode = 8)
With parameter setting “Switch Mode” = 8, the direction of the frequency is monitored.
The function is always active. With negative frequencies (f < 0 Hz), the output is set to
ON. The output will reset with positive frequencies (f > 0 Hz) or with standstill (f = 0 Hz)
after expiration of the Standstill Time.
Relevant Parameters Remark
„Switch Mode “
= 8
„Pulse Time “
statically = 0 or pulse duration in x seconds
„Standstill Time“ standstill time in seconds
„Output Mode“ homogenous or inverse (affects the Safety Integrity Level SIL/PL)
Relevant input functions Remark
none none
Example:
The transition from a positive to a negative frequency will cause an immediate change of
the output state. Only in case of a transition from a negative frequency to zero, the
output will not change before Standstill Time has elapsed.