Description Of Stop C - Siemens SINUMERIK 840D sl Function Manual

03.06
rpm
n
t
a)
b)
Fig. 6-6
6.3.4

Description of STOP C

Action in the drive monitoring channel:
The drive is braked at the current limit in response to speed setpoint input = 0 and
in parallel, the timer via parameter p9552: "Transition time from STOP C to SBH" is
started. The SBH function is automatically activated after the timer expires.
Action in the NCK monitoring channel:
Essentially the same as in the drive, the control specifies a zero speed setpoint
and the interface signal "position controller active" (DB 31, ... DBX 61.5) of the as-
sociated drive is set to zero.
At the same time, the timer via MD 36952: $MA_SAFE_STOP_SWITCH_TIME_C
is started. The SBH function is automatically activated after the timer expires.
S Effect:
The drive is braked at the current limit under closed-loop speed control and
brought into SBH.
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
ac
b)
a)
Shutdown speed,
pulse
cancellation
STOP B
Delay time, pulse
cancellation
STOP B
STOP B
Transition from STOP B to STOP A
Safety Functions Integrated in the System/Drive
a) Shutdown speed is reached before
the pulse cancellation delay time expires
b) Shutdown speed is reached after the
pulse cancellation delay time expires
STOP A
STOP A
STOP A
6.3 Safe stops A-F
t
6-123