Siemens Sinumerik 840D sl Function Manual page 397

10/15
36933
MD number
Default value: 0
Change becomes effective after: RESET
Data type: DOUBLE
Meaning:
Special cases, errors,...
corresponds with ...
Additional references
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
$MA_SAFE_DES_VELO_LIMIT[0...3]
SG setpoint speed limiting
Min. input limit: 0
Protection level: 7/2
Evaluation factor to define the setpoint speed limit.
The selection of the active evaluation factor is realized using the axis specific NC/PLC
interface DB3x.DB34.0 and .1
Parameter assignment:
This MD may have to be altered several times before an optimum setting for the dynamic
response of the drives is found.
Effect of SI monitoring with NCK involvement:
- - When 0% is entered the setpoint speed limiting is not active.
- - When 100% is entered, the setpoint is limited to the active SG stage
- - The active actual speed limit value is evaluated using this factor and is entered into the
interpolator as setpoint limit.
- - When SBH is selected, a setpoint of 0 is entered.
- - This data is not included in the crosswise data comparison with the drive.
- - This data is not included in the axis- -specific checksum MD36998
$MA_SAFE_ACT_CHECKSUM[ ] as it involves a 1- -channel function.
If, from the PLC user program, there is no input to select the evaluation factor, then MD
value from MD36933 $MA_SAFE_DES_VELO_LIMIT[0] becomes active.
See Chapter : 11.1 "Limiting the setpoint velocity"
8.1 Machine data for SINUMERIK 840D sl
Max. input limit: 100
Data Description
Unit:%
8-397