Safety Information Channel And Safety Control Channel - Siemens SINUMERIK 840D sl Function Manual

● The feed override should be set to 100% so that the required velocity can be reached during
the test. If this is realized via the interface, then it should be carefully noted that if the brake
test is not successful, then the override does not statically remain at 100%. As an alternative
to directly writing to the interface, a message can be generated.
● The torque limits change when a parameter set is changed over.
● Changing the reference torque p2003 means that the use of a referred torque quantity
results in a different dynamic behavior. If p2003 is changed then this alters the system
behavior when the brake test is performed. In order to avoid this, when booting, the NCK
system software reads out the value from p2003 and saves it in MD
$MA_SAFE_BRAKETEST_TORQUE_NORM. For each additional control boot, MD36969
$MA_SAFE_BRAKETEST_TORQUE_NORM is checked for changes and where relevant,
Alarm 27039 "Axis %1 parameterization MD %2[%3] changed, confirmation and functional
test required!" is displayed. MD36969 $MA_SAFE_BRAKETEST_ TORQUE_NORM, is
included in the axis-specific checksum $MA_SAFE_ACT_CHECKSUM[0].
● With simultaneous use of the extended brake control (r0108.14=1) and dynamic stiffness
control (MD32640 $MA_STIFFNESS_CONTROL_ENABLE=1), the factory setting
p1152=r0899.15 must be changed ("disconnected"), and p1152 must be set to 1.
● Transformations: Active transformations must be deactivated for the duration of the brake
test, as otherwise unexpected axis motion can occur.
8.7

Safety Information Channel and Safety Control Channel

Safety Information Channel
The Safety Information Channel (SIC) enables Safety Integrated functionality status
information of the drive to be transmitted to the higher-level motion control system. As a
consequence, for safety STOP responses of the drive (e.g. for STO) the motion control is
informed, which allows it to respond in the best possible way. This means that in situations
such as these e.g. no additional setpoints are issued for the path, which means that no follow-
on/subsequent alarms occur that have to be acknowledged. Any types of setpoint inputs, e.g.
override, F or S program blocks, are blocked by the setpoint speed limiting transferred in the
SIC.
Further, the status information is made available in the PLC user interface. This gives users
the option of initiating the appropriate responses in the PLC user program to the safety
functions of the drive.
Safety Control Channel
With the Safety Control Channel (SCC), control information is sent to the safety functions of
the drive via the higher-level control. This means that functions, such as a brake test or a test
stop, can be selected in the drive.
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
8.7 Safety Information Channel and Safety Control Channel
Connecting sensors and actuators
309