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

Safety Functions Integrated in the System/Drive
6.5 Safely-reduced speed (SG)
6.5.4

Override for safely-reduced speed

General information
16 SG override stages for the limit values of safely-reduced speeds 2 and 4 using
SGEs. This means that the limit values for SG2 and SG4 can be more finely grad-
uated.
Using the following machine data, an override stage can be assigned factors of
between 1 and 100%:
for 840D sl:
MD 36932: $MA_SAFE_VELO_OVR_FACTOR[n]
for SINAMICS S120:
p9532[0...15]: SI motion SG override factor
Application example
For grinding applications, the limit value for the safely-reduced speed can be ad-
justed to the variations in the grinding wheel peripheral speed using the SG over-
ride.
Activating
The following prerequisites must be fulfilled before the function can be used:
S The function is enabled via MD 36901 / parameter p9501:
$MA_SAFE_FUNCTION_ENABLE, bit 5 / SI motion enable, safety functions,
bit 5
S The SBH/SG function is enabled via MD36901 / parameter p9501:
$MA_SAFE_FUNCTION_ENABLE, bit 0 / SI motion enable, safety functions,
bit 0
S The required SGEs "SG override selection bits 3, 2, 1, 0" have either been
completely or partially configured
S The SG override factors have been entered into the appropriate MD 36932 /
parameter p9532: $MA_SAFE_VELO_OVR_FACTOR[n] / SI motion SG over-
ride factor
S Safely-reduced speed 2 or 4 has been activated
Changing-over an SG override
SG override values are changed-over subject to the same conditions as those that
apply to speed limit values.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
© Siemens AG, 2006. All rights reserved
03.06