Override For Safely Reduced Speed - Siemens SINUMERIK 840D sl Function Manual

Safety integrated

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Safety functions integrated in the system/drive

7.5 Safely reduced speed (SG)

For SINAMICS S120:

p9563[0...3] SI Motion SLS(SG)-specific stop response (Control Unit)

Override for safely reduced speed

16 SG override stages for the limit values of safely reduced speeds 2 and 4 can be entered

using SGEs. This means that the limit values for SG2 and SG4 can be more finely graduated.

Using the following machine data, an override stage can be assigned factors of between 1 and

for 840D sl:

MD36932 $MA_SAFE_VELO_OVR_FACTOR[n]

for SINAMICS S120:

p9532[0...15] SI Motion SLS (SG) override factor (Control Unit)

Application example

For grinding applications, the limit value for the safely reduced speed can be adjusted to the

variations in the grinding wheel peripheral speed using the SG override.

The following prerequisites must be fulfilled before the function can be used:

● The function must be enabled using MD36901 / parameter p9501

$MA_SAFE_FUNCTION_ENABLE, Bit 5 / SI Motion enable safety functions, bit 5

● Function SBH/SG is enabled via MD36901 / parameter p9501

$MA_SAFE_FUNCTION_ENABLE, Bit 0 / SI Motion enable safety functions (Control Unit),

● The required SGEs "SG override selection bits 3, 2, 1, 0" have either been completely or

partially configured

● The SG override factors in the corresponding MD36932 / parameter p9532 have been

entered: $MA_SAFE_VELO_OVR_FACTOR[n] / p9532[0...15] SI Motion SLS (SG) override

factor (Control Unit)

● Safely reduced speed 2 or 4 has been activated

Function Manual, 12/2017, 6FC5397-4BP40-6BA1

Safety Integrated