Control Via Terminals On The Control Unit And The Power Unit; Features - Siemens SINUMERIK 840D sl Function Manual

Safety Functions integrated in the drive

5.6 Control via terminals on the Control Unit and the power unit

Safe Brake Control for Motor Modules in the chassis format
To be able to control the high rating brakes used with devices of this format, an additional Safe
Brake Adapter (SBA) module is needed. You can obtain more information on the connection
and wiring of the Safe Brake Adapter in the Equipment Manual "SINAMICS G130/G150/S120
Chassis/S120 Cabinet Modules/S150 Safety Integrated".
Parameter p9621 is used to define via which digital input the feedback signal (brake open or
closed) of the Safe Brake Adapter is sent to the Control Unit.
The additional functionality and the control of the brake, in other words, reaching a safe state,
are in this case essentially the same as the sequence for booksize units.
Response time with the Safe Brake Control function
The following values can be specified for the response times when the function is selected/
deselected via input terminals:
● Typical response time
4x safety monitoring clock cycle CU (r9780) + inputs/outputs, sampling time (p0799)
● Maximum response time that can occur when a fault develops
8x safety monitoring clock cycle CU (r9780) + inputs/outputs, sampling time (p0799)
Example:
Assumption, monitoring clock cycle CU (r9780) = 4 ms and
Inputs/outputs sampling time (r0799) = 4 ms
t
R_type
t
R_max
Parameter overview (see Chapter "Parameter overview (Page 395)")
● p0799 CU inputs/outputs, sampling time
● p9621 BI: SI signal source for SBA (Control Unit)
● r9780
● p9821 BI: SI signal source for SBA (Motor Module)
● r9880
5.6 Control via terminals on the Control Unit and the power unit
5.6.1

Features

● Only for the STO, SS1 (time-controlled) and SBC functions
● Dual-channel structure via two digital inputs (Control Unit / power unit).
● The signals of the components connected at the terminals (pushbuttons, switches, ...) can
be debounced in order to prevent false tripping due to signal disturbances or non-
symmetrical test signals. The filter times are set using parameters p9651 and p9851.
66
= 4x r9780 (4 ms) + r0799 (4 ms) = 20 ms
= 8x r9780 (4 ms) + r0799 (4 ms) = 36 ms
SI monitoring cycle (Control Unit)
SI monitoring cycle (Motor Module)
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated