Brake Control For Sinumerik 840D Sl; Sequence - Siemens SINUMERIK 840D sl Function Manual

solution, see Chapter "Parameterization (Page 291)", Section MD36968
$MA_SAFE_BRAKETEST_CONTROL: Sequence check for the brake test.
8.6.5

Brake control for SINUMERIK 840D sl

If Safety Integrated is activated for an axis, then the brake can be closed using the interface
signal "Close brake", DB31-61, DBX23.5. The feedback signal is realized using the interface
bit "Motor holding brake open", DB31-61, DBX92.5. This involves a single-channel control
configuration. If the brake is to be safely controlled, then the SBC function integrated in the
drive must also be activated. The interface bits for the brake, only activated in conjunction with
Safety Integrated, have a higher priority than the standard interface signal DB31-61, DBX20.5
"Open motor holding brake". The "Extended brake control" function of the S120 is used
independently of SBT.
8.6.6

Sequence

Configuring the brake test
The brake test must be carried out before carrying out the test stop.
If the brake test was not successful (i.e. the brake cannot hold the axis), then it is not
permissible that the test stop is carried out. Users must carefully take this into consideration
when configuring the brake test and test stop. The brake may only be tested when the axis
is in an absolutely safe position.
The brake test must always be started when the axis is at a standstill. For the entire duration
of the brake test, the enable signals of the parameterized axis must be set to enable (e.g. the
controller inhibit, feed enable signals). It must be ensured that a feed override of 100% is
effective.
Monitoring limits of the PLC sequence signals
Step
Activate brake test
Brake test active
Close brake
Brake closed
Output traversing command
Check, output traversing command
Wait for the holding time
Deselect brake test / open brake
The PLC signals described here are used in or as parameters in the basic program blocks
FB11 and FC18.
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
WARNING
Status/expected feedback signal
DBX11.0 = 1
DBX71.0 = 1
DBX23.5 = 1
DBX92.5 = 0
DBX64.6 or DBX64.7
DBX62.5 = 1
DBX62.5 = 1
DBX71.0 = 0
Connecting sensors and actuators
8.6 Safe Brake Test (SBT)
TV_BTactiv
TV_BTactiv
TV_Bclose
TV_Bclose
TV_FeedCommand
TV_FXSreached
TV_FXShold
TV_BTactiv
297