Selecting/Deselecting Safely Reduced Speed - Siemens SINUMERIK 840D sl Function Manual

Encoder frequency limit
The encoder limit frequency is 500 kHz. When the encoder limit frequency in SG is exceeded,
the SG-specific parameterized stop is initiated.
Note
Monitoring against a limit frequency of 500 kHz is not performed for DRIVE-CLiQ encoders.
7.5.2

Selecting/deselecting safely reduced speed

Selecting SG
The following SGEs are used to select SG:
SBH/SG deselec‐
tion
= 1
= 0
= 0
Note: x → any signal state
Note
The actual status of the function is displayed using the SGA "SBH/SG active" and SGA "SBH
active".
Before activating the SG function it must be ensured that the speed of the axis/spindle is lower
than the selected speed limit value. If it is higher, an alarm is generated that causes the drive
to be shut down.
The SGEs and SGAs are described in Chapter "Safety-related input/output signals
(Page 171)"
Selecting speed limit values
The maximum permissible speed of an axis/spindle in the setting-up mode is defined for
individual machine types in the C Standards (product standards). The machine manufacturer
is responsible for ensuring that the correct speed limit value is selected depending on the
operating mode and the application.
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
SGE
SBH deselection
x SBH and SG are deselected
= 0 SBH is selected
(see Chapter "Safe Operating Stop (SBH) (Page 106)")
= 1 SG is selected
Safety functions integrated in the system/drive
7.5 Safely reduced speed (SG)
Meaning
139