Siemens SINUMERIK 840D Description Of Functions page 75

11.03
Example 2, delaying the transition from STOP F to STOP B
The same parameterization as in example 1 is shown in the following diagram.
However, when a STOP F occurs, no monitoring function is active. At instant in
time t2, a monitoring function is activated. ESR is only started if there is a
STOP F with active monitoring function.
Fig. 3-10
The following actions take place at the individual instants in time:
t1:
t2:
t3:
t4:
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
v
t1 t2
Speed characteristic of an SI axis when stopping with STOP F
STOP F occurs, no response
Any time after t1, a monitoring function is activated. At this instant in
time, the transition time to a STOP B is started and bits 1 in
$A_XFAULTSI and $VA_XFAULTSI of this axis are set.
500 ms after t2, braking starts along the parameterized ramp.
STOP B is initiated 2.5 s after t2. The axis is already stationary
at this time. This means that pulses can be immediately cancelled.
3 Safety-Related Functions
3.1 Basic mechanisms of SI functions
Weiterfahren (ESR)
Bremsen an Rampe
= Stillsetzen (ESR)
t3
t4
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