Siemens SINUMERIK 840D sl Function Manual page 52

Safety Functions Integrated in the Drive
4.2 Safe standstill (SH)
Enabling the safe standstill (SH) function
The safe standstill function is enabled via the following parameters:
S p9601.0
S p9801.0
Selecting/deselecting safe standstill
The safe standstill function must be selected/deselected "simultaneously" in both
monitoring channels using the input terminals and act only on the associated drive.
1 signal:
0 signal:
"Simultaneously" means:
The changeover must be completed in both monitoring channels within the para-
meterized tolerance time.
S p9650
S p9850
If the safe standstill function is not selected/deselected within the tolerance time,
this is detected by the crosswise data comparison and fault F01611 or F30611
(STOP F) is output.
The following occurs when safe standstill is selected:
S Every monitoring channel initiates safety-relevant pulse cancellation via its shut-
down path.
S A brake is applied (if a brake is connected and SBC is configured).
The following occurs when safe standstill is de-selected:
S Every monitoring channel withdraws (cancels) the safety-relevant pulse can-
cellation via its shutdown path.
S The safety prompt "close brake" is cancelled.
Note
If the two input signals for selecting/deselecting safe standstill differ momentarily,
i.e. within the tolerance time in p9650/p9850, the drive is stopped although no
message is output.
4-52
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
"Safe standstill enabled via terminals (Control Unit)"
"Safe standstill enabled via terminals (Motor Modules)"
Deselects the function
Selects the function
"SI SGE changeover tolerance time (Control Unit)"
"SI SGE changeover tolerance time (Motor Modules)"
© Siemens AG, 2006. All rights reserved
03.06