Siemens Sinumerik 840D sl Function Manual page 742

Diagnostics
10.3 Safety messages for SINAMICS S120
Table 10-3 Fault reactions
Fault Response
reaction
OFF2 Internal/external
pulse disable
(OFF2)
OFF 3 Brakes along the
OFF 3 down
ramp and then
the pulses are
cancelled
STOP 2 n_set = 0
(Halt 2)
Acknowledging faults
The list of faults and alarms specifies how to acknowledge each fault after the
cause has been eliminated.
Table 10-4 Acknowledging faults
List
POWER The fault is acknowledged by a POWER ON (switch drive unit off and on again).
ON
Note:
If the fault cause has still not been resolved, then the fault is immediately displayed again
after booting.
Re--establishing communications to the NCK or PLC after a communication failure has
been detected to this component is an exception. In this case, just the same as for a
normal boot, the fail--safe values are activated, however the alarms present are acknowl-
edged for a new communication failure.
10-742
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Description
Instantaneous pulse suppression, the drive
S
"coasts" to a standstill.
The motor holding brake (if parameterized) is
S
closed immediately.
Switch--on inhibit is activated.
S
The drive is braked along the OFF3 down ramp
S
(p1135) by immediately entering n_set = 0.
When zero speed is detected, the motor holding
S
brake (if parameterized) is closed. The pulses
are cancelled when the brake application time
(p1217) expires.
Zero speed is detected if the actual speed drops
S
below the threshold in (p1226) or if the monitor-
ing time (p1227) started when speed setpoint <=
speed threshold (p1226) has expired.
The drive is braked along the OFF 3 down ramp
S
(p1135) by immediately entering n_set = 0.
The drive remains in closed--loop speed control.
S
Description
Safety stop
response
STOP A,
Test stop
STOP B
(after r9556
has expired or
p9560 is fallen
below, STOP
A is initiated)
STOP C
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