Siemens SINUMERIK 840D sl Function Manual page 297

05.08
36966
MD number
Default value: 5.0
Change becomes effective after: POWER ON
Data type: DOUBLE
Significance:
corresponds with ...
Additional references
36967
MD number
Default value: 1.0
Change becomes effective after: POWER ON
Data type: DOUBLE
Significance:
corresponds with ...
Additional references
36968
MD number
Default value: 0
Change becomes effective after: POWER ON
Data type: DWORD
Significance:
corresponds with ...
Additional references
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
$MA_SAFE_BRAKETEST_T ORQUE
Holding torque, brake test
Min. input limit: 0.0
Protection level: 7/2
This MD specifies the torque or force when testing the mechanical brake system. This
torque or this force is generated during the test against the closed brake and it is not per-
missible that the axis moves.
The percentage value entered here refers to drive parameter p2003 of the axis.
When selecting the brake test (i.e. with the brake open), if the actual torque is more than
85% of the test torque, the brake test is interrupted with Alarm 20095. This therefore en-
sures that the motor can hold the axis even if the brake is defective.
If the brake test is performed using drive parameter p1532 ($MA_SAFE_BRAKET-
EST_CONTROL bit 0 = 0), the required safety margin is increased by twice the difference
between the actual holding torque and the value in parameter p1532.
The corresponding test function is enabled using MD $MA_FIXED_STOP_MODE bit 1.
MD 36969: $MN_SAFE_BRAKETEST_TORQUE_NORM
/FBSI/ see Chapter 7.4: "Safe brake test (SBT)"
$MA_SAFE_BRAKETEST_POS_T OL
Position tolerance, brake test
Min. input limit: –
Protection level: 7/2
Maximum position tolerance when testing the mechanical brake system.
If the axis position deviates from the position by more than this tolerance, when the brake
test is selected, then the brake test is aborted.
The corresponding test function is enabled using MD $MA_FIXED_STOP_MODE bit 1.
/FBSI/ see Chapter 7.4: "Safe brake test (SBT)"
$MA_SAFE_BRAKETEST_CONTROL
Expanded setting for the brake test
Min. input limit: 0
Protection level: 7/2
Expanded settings for the brake test.
Bit 0: Select the average value for the torque limiting
0:
Drive parameter p1532 is used as the average value of the torque limiting.
1:
The measured torque at the instant in time that the brake test is selected is used as the
average value of the torque limit.
/FBSI/ see Chapter 7.4: "Safe brake test (SBT)"
8.1 Machine data for SINUMERIK 840D sl
Max. input limit: 800.0
Max. input limit: –
Max. input limit: 1
Data Description
Unit: %
Unit: mm/degr.
Unit: –
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