Siemens Sinamics S120 Function Manual page 146

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
Parameterization of the brake ramp
p9581 (SI Motion braking ramp reference value) and p9583 (SI Motion brake ramp
monitoring time) are used to set the gradient of the brake ramp. Parameter p9581 determine
the reference speed and parameter p9583 define the ramp-down time. Parameter p9582 is
used to set the time which passes after the triggering of SS1, selection of SLS or SLS level
changeover and the start of brake ramp monitoring.
Not e
S B R and OFF3 c urve
The SBR curve should be aligned to the OFF3 curve. In addition, you should check that
under every load condition, the drive can follow this OFF3 ramp.
Not e
Limitation of the S BR delay time
The SBR delay time (p9582) is limited to a minimum value of 2 SI motion monitoring clock
cycles (2 x p9500), i.e. even if a value less than 2 x p9500 is parameterized for the delay
time (p9582), then SBR is only effective 2 clock cycles after an active SS1.
If a value greater than 2 × p9500 is parameterized for the delay time (p9582), SBR becomes
active after active SS1 after the time p9582. Ensure that you round off the SBR delay time to
an integer multiple of the safety cycle (p9500).
Responses to brake ramp violations (SBR)
● Safety message C01706 (SI Motion: SAM/SBR limit exceeded)
● Drive stopped with STOP A
● For an encoder fault in a 1-encoder system, the "Safe acceleration monitoring" function is
not active. A stop response, Category 0 or 1 (EN 60204-1) can be set using parameter
p9516.4.
Features
● Part of the "SS1 with/without encoder", "SS2 with encoder", "SLS without encoder" and
"STOP B/STOP C (for safety with encoder)" functions.
● Parameterizable safe brake ramp
Ov erview of important parameters (see SINAMICS S120/S150 List Manual)
• p9516
• p9560
• p9581
• p9582
• p9583
146
SI Motion encoder configuration safety functions (Control Unit)
SI Motion STO shutdown speed (Control Unit)
SI Motion braking ramp reference value (Control Unit)
SI Motion braking ramp delay time (Control Unit)
SI Motion braking ramp monitoring time (Control Unit)
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated