Safe Brake Control (Sbc) - Siemens SINUMERIK 840D sl Function Manual

05.08
4.4

Safe Brake Control (SBC)

Description
Safe Brake Control is used to control actuators that function according to the
closed–circuit principle (e.g. brake).
Warning
!
The Safe Brake Control function does not detect faults in the brake itself – such as
e.g. brake winding short–circuit, worn brakes and similar.
If a cable breaks, this is only recognized by the Safe Brake Control function when
the status changes, i.e. when the brake is applied/released.
Functional features of Safe Brake Control (SBC)
S When Safe Torque Off is selected or when safety monitors are triggered, "SBC"
is performed with safe pulse cancelation.
S Unlike conventional brake control, SBC is implemented via p1215 through two
channels.
S SBC is initiated independently of the brake control mode set in p1215. However,
SBC is not recommended for p1215 = 0 or 3.
S The function must be enabled via parameter.
S Each time Safe Torque Off is selected, the holding brake is applied immediately
with a forced checking procedure carried out.
Enabling the Safe Brake Control (SBC) function
The Safe Brake Control function is enabled via the following parameters:
S p9602
S p9802
The Safe Brake Control function only becomes active if at least one safety monitor-
ing function is enabled (i.e. p9601 = p9801 0).
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
"SI enable safe brake control (Control Unit)"
"SI enable safe brake control (Motor Module)"
Safety Functions Integrated in the Drive
4.4 Safe Brake Control (SBC)
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