Technical data

Safety Integrated Functions
8.4 Safety Integrated Basic Functions
Function Manual
Function Manual, 06/2012, 6SL3097-4AB10-0BP4
361
Two-channel brake control
The function "Safe Brake Control" is carried out using a two-channel method, in which both
the plus-potential (24 V) leading and the ground-potential leading brake connection are
connected to the Safe Brake Relay.
The brake diagnosis can only reliably detect a malfunction in either of the switches in the
Safe Brake Relay when the status changes (when the brake is released or applied).
If the Safe Brake Relay or its controller detects a fault, the brake current is switched off and a
safe status is reached.
Response time with the "Safe Brake Control" function
For the response times when the function is selected/deselected via input terminals, see the
table in "Response times".
NOTICE
When controlling the brake via a relay using "Safe Brake Control":
A relay cannot be used to apply the brake if "Safe Brake Control" is being used. It may
result in faults being triggered in the brake control.
Overview of important parameters (see SINAMICS S110 List Manual)
● p9602 SI enable safe brake control (CPU 1)
● r9780 SI monitoring clock cycle (CPU 1)
● p9802 SI enable safe brake control (CPU 2)
● r9880 SI monitoring clock cycle (CPU 2)
8.4.4 Safety faults
The fault messages for Safety Basic Functions are stored in the standard message buffer
and can be read from there. In contrast, the fault messages for Safety Integrated Extended
Functions are stored in a separate safety message buffer (see section "Message buffer").
When faults associated with Safety Integrated Basic Functions occur, the following stop
responses can be initiated: