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

Safety Functions Integrated in the System/Drive
6.3 Safe stops A-F
S Alarm message for an internally initiated STOP C:
The alarm message "STOP C initiated" is output (see Section 10.2, "Alarms for
SINUMERIK 840D sl").
S Acknowledgement for an internally initiated STOP C:
An unintentional restart is prevented for a STOP C. The error can be acknowl-
edged using the NC-RESET key.
SGA STOP C is active
This signal indicates that STOP C is active.
0 signal:
1 signal:
SGE de-select external STOP C
If a stop request is active, SGA "STOP C is active" is set in the same way as it
would be for an internally initiated STOP C.
The MD 36977: $MA_SAFE_EXT_STOP_INPUT[1] is used to define the selection/
de-selection of the external braking request; in this case "de-select external STOP
C" (braking along the current limit).
6.3.5

Description of STOP D

Action in the drive monitoring channel:
The drive monitoring channel requests a path stop or braking along the accelera-
tion characteristic (NC-MD). In parallel, the timer is started via parameter 9553:
"transition time from STOP D to SBH" is started. The SBH function is automatically
activated after the timer expires.
Action in the NCK monitoring channel:
Essentially the same as the drive, the control system monitoring channel requests
a path stop or braking along the acceleration characteristic (NC-MD). At the same
time, the timer is started via MD 36953:$MA_SAFE_STOP_SWITCH_TIME_D.
The SBH function is automatically activated after the timer expires.
S Effect:
The drive is braked in a group - including simultaneous axes - along the set tra-
versing path. Endlessly rotating axes are braked at the acceleration limit. The
SBH function is automatically activated after the timer expires.
S Alarm message for an internally initiated STOP D:
The alarm message "STOP D initiated" is output.
S Acknowledgement for an internally initiated STOP D:
An unintentional restart is prevented for STOP D. The error can be acknowl-
edged using the NC-RESET key.
SGA STOP D is active
This signal indicates that STOP D is active.
0 signal:
1 signal:
6-124
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
STOP C is not active.
STOP C is active.
STOP D is not active.
STOP D is active.
© Siemens AG, 2006. All rights reserved
03.06