Programming manual SCU-series
HB-37500-820-10-12F-EN SCU Programming manual
Page 207 of 252
Status: 19.03.2021
SOS (safe standstill)
Standstill monitoring
Amount:
c. f.
“Overview of safety
modules
“
Function:
standstill monitoring
Input:
standardized position signal / standardized speed signal
RESET-Funktion:
Violation of the permitted monitoring range is saved and requires a RESET
confirmation. RESET confirmation is alternatively carried out via:
•
RESET function in the group of the input elements.
•
Function button at the front side of a basis group
•
Fieldbus input via Reset block.
NOTICE:
it must be program-technically ensured that the input of the SOS block does
not remain 1 in case of a trigger event. Otherwise, the input cannot be reset.
Description of the function:
•
Standstill monitoring of the drive at current position with released drive and, if necessary,
with enabled position controller.
•
Calculation of the current speed V from current position signal or from current speed
signal X
•
Comparison of the current speed with the parametrised monitoring window
Range
HI
LO
X > ( X0
–
DX ) AND
X < ( X0 + DX )
X
X <= (X0 - DX )
X
V
X
X0
DX
DX