Siemens SINUMERIK 840D sl Function Manual page 48

System features
4.5 Safety information & instructions and residual risks
Additional residual risks
● The "Automatic restart" function of SINAMICS S120 must not be used in conjunction with
● Encoder faults are detected using various hardware and software monitoring functions. It
● The Category 0 stop function according to EN 60204-1 (defined as STOP A in Safety
● When a limit value is violated, the speed may exceed the set value briefly or the axis/
● A position-controlled axis may be forced out of the Safe Operating Stop state (SBH) by
● Safety Integrated is not capable of detecting parameterization and programming errors
● Safety Integrated is not capable of detecting parameterization and programming errors
● Motor modules and motors must always be replaced with the same equipment type. If this
● If an internal or external fault occurs, none or only some of the parameterized safety
● An additional residual risk is obtained as a result of the possible random hardware faults
48
WARNING
safety functions since this is prohibited in EN 60204-1, Chapter 9.2.5.4.2. (Deselecting a
safety shutdown function alone must not result in the machine restarting.)
is not allowed to disable these monitoring functions and they must be parameterized
carefully. Depending on the fault type and which monitor responds, a Category 0 or
Category 1 stop function according to EN 60204-1 (defined as STOP A or B in SINUMERIK
Safety Integrated) is activated.
Integrated) means that the spindles/axes are not braked to zero speed, but coast to a stop
(this may take an appropriately long time depending on the level of kinetic energy involved)
or can even be accelerated by drawing/pulling loads. This must be integrated in the
protective door interlocking logic e.g. using logic operation n<n
spindle may overshoot the setpoint position to a greater or lesser degree during the period
between error detection and system response. This depends on the dynamic response of
the drive and the parameters/machine data settings that have been entered (see Chapter,
"System/drive integrated safety functions").
mechanical forces that are greater than the maximum torque of the drive motor. In such
cases, a stop function, Category 1 according to EN 60204-1 (STOP B) is activated.
made by the machine manufacturer. The required level of safety can only be assured by
careful acceptance testing.
made by the machine manufacturer. The required level of safety can only be assured by
careful acceptance testing.
is not the case, the parameters will no longer match the actual configuration - causing
Safety Integrated to respond incorrectly. When an encoder is replaced, the axis involved
must be re-calibrated.
functions are available during the STOP-F response as a result of the fault. This must be
taken into account when a delay time between STOP F and STOP B is parameterized.
This applies in particular to vertical axes.
for electronic systems, arising from their very principle, which is expressed using this PFH
value.
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated