Further functionality and the activation of the brake, i.e. reaching the safe status, are in this case
the same as the above described procedure for booksize devices.
Safe Brake Control with power units in a parallel connection
Note
SBC for parallel connection of power units
Safe Brake Control with power units in a parallel connection is available if r9771.14 = 1.
If you wish to use SBC with SBA for chassis format power units connected in parallel, then it is
only permissible that you connect precisely one SBA to a power unit in the parallel connection.
The Safe Brake Adapter and therefore the brake are controlled via this power unit.
There are two options for registering this power unit with the system:
● Automatic brake identification when commissioning the system for the first time
– Requirements:
- No Safety Integrated Functions enabled
- p1215 = 0 (no motor holding brake available)
– During the first commissioning, SINAMICS checks at which power unit an SBA is
connected. If precisely one SBA is found, the number of the power unit is entered into
parameter p7015.
If several SBAs are found at the parallel-connected power units, message "F07935
drive: Motor holding brake configuration error" is output.
– For devices in the chassis format, if the SBA feedback signal (SBA_DIAG) is read in via
an input of the power unit, then in addition, this digital input is automatically entered into
parameter p9621.
● Manually defining the power unit
– Enter the component number of the power unit, to which the SBA is connected, into
parameter p7015. If no SBA is connected to the power unit, faults are detected when
controlling the motor holding brake and fault F01630 is output.
– In parameter p9621 (p9621 = BICO interconnection to r9872.3), enter the digital input of
the power unit to which the SBA is connected and via which the SBA feedback signal
(SBA_DIAG) is read in.
Note
Disconnecting the brake cable for service purposes
As long as the brake is permanently released and not actuated, it is possible to briefly
disconnect the brake cable, e.g. for service purposes, and not receive fault messages. In the
case of a fault, message F07935 is only output when the brake is controlled.
Safety functions integrated in the drive
4.5 SBC (Basic/Extended)
Safety Integrated (with SINAMICS S120)
112 Commissioning Manual, 02/2020, A5E46305916B AB
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