Siemens SINUMERIK 840D sl Function Manual page 51

05.08
Warning
!
S The "Automatic restart" function of SINAMICS S120 must not be used in
conjunction with safety functions since this is prohibited in Chapter 9.2.5.4.2 of
IEC 60204, Part 1 (1998). (Deselecting a safety shutdown function alone must
not result in machine restarting.)
S For a 1–encoder system, encoder faults are detected by various HW and SW
monitoring functions. It is not permissible that these monitoring functions are
deactivated 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.
S The Category 0 stop function according to EN 60204–1 (defined as STOP A in
Safety 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). This must be included in the protective door
locking mechanism logic (e.g. with the logic operation n<n
S When a limit value is violated, the speed may exceed the set value briefly or
the axis/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 6, "System/drive integrated
safety functions").
S A position–controlled axis may be forced out of the safe operating stop state
(SBH) by mechanical forces that are greater than the max. axis torque. In such
cases, a stop function, Category 1 according to EN 60204–1 (STOP B) is
activated.
S Safety Integrated is not capable of detecting parameterization and
programming errors made by the machine manufacturer. The required level of
safety can only be assured by thorough and careful acceptance testing.
S Motor modules and motors must always be replaced with the same equipment
type. If this is not the case, the parameters will no longer match the actual
configuration – causing Safety Integrated to respond incorrectly. The axis
involved must be re–commissioned if an encoder is replaced.
S If an internal or external fault occurs, none or only some of the parameterized
safety functions are available during the STOP–F response triggered by the
fault. This must be taken into account when a delay time between STOP F and
STOP B is parameterized. This is especially true for vertical axes.
S An additional residual risk is obtained as a result of the possible random
hardware faults for electronic systems, arising from their very principle, which is
expressed using this PFH value.
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
3.5 Safety information & instructions and residual risks
System Features
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