Parameterization - Siemens Sinumerik 840D sl Function Manual

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7.6.2

Parameterization

The user can use the following axis--specific NCK machine data to parameterize
the function test of the mechanical braking system:
Machine data
MD37000 $MA_FIXED_STOP_MODE
MD37030 $MA_FIXED_STOP_THRESHOLD
MD36966 $MA_SAFE_BRAKETEST_TORQUE
MD36967 $MA_SAFE_BRAKETEST_POS_TOL
MD36968 $MA_SAFE_BRAKETEST_CONTROL
The function test of the mechanical braking system is enabled by setting bit 1 in
MD37000 $MA_FIXED_STOP_MODE. If the user needs to travel to a fixed stop
with this axis from the part program, bit 0 can also be set. It is internally monitored
to check that only one type of travel to fixed stop is active at a time. In the case of
an error, Alarm 20092, "Axis % Travel to fixed stop still active" is issued.
MD37000 $MA_FIXED_STOP_MODE: Travel to fixed stop mode
The function test of the mechanical braking system is enabled by setting bit 1 in
MD37000 $MA_FIXED_STOP_MODE. If the user needs to travel to a fixed stop
with this axis from the part program, bit 0 can also be set. It is internally monitored
to check that only one type of travel to fixed stop is active at a time. In the case of
an error, Alarm 20092, "Axis % Travel to fixed stop still active" is issued.
MD37030 $MA_FIXED_STOP_THRESHOLD: Threshold for fixed stop reached
The contour deviation that is determined is always used in the brake test to detect
that the fixed stop has been reached. The parameterization in MD37040 $MA_
FIXED_STOP_BY_SENSOR is therefore irrelevant. The required threshold value
must be set in MD37030 $MA_FIXED_STOP_THRESHOLD. This means that the
traversing distance from the PLC via FC 18 must be greater than this threshold
value.
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Connecting Sensors/Actuators
7.6 Safe Brake Test (SBT)
Description
Enable brake test
Threshold for fixed stop detection
Enters the test torque
Position tolerance, brake test
Bit 0 = 0: Drive MD 1192/p1532 is used as the
average value of the torque limit.
Bit 0 = 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.
Bit 1 = 0: The torque limit value must be reached
during the programed travel distance.
Bit 1 = 1: The torque limit value must be reached
during the programed time (TV_FXSreached para-
meterization FB11).
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