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

03.06
6.3.7

Description of STOP F

The STOP F response is permanently assigned to the crosswise data comparison.
Dormant faults/errors are detected in the drive and control systems.
S Effect:
When a discrepancy is detected between the drive and NCK monitoring chan-
nel, the following responses are initiated:
Response, if no safety functions are active:
Dormant faults/errors are also detected if none of the safety-related functions are
active (safety functions are SBH, SG, SE, SN). The saved message "defect in a
monitoring channel" is output on both the drive and control sides and can only be
acknowledged using the NC-RESET key. The message does not interrupt machin-
ing. A system restart is prevented by an internal NC start/traversing inhibit function.
Response if one safety function is active:
Dormant faults/errors are detected. A STOP B/A response is initiated in the drive
and control system (see description of STOP B). The error can only be acknowl-
edged from the drive and control using a power on.
Exception: If a STOP C/D/E is already present, because STOP F has a lower
priority (see Table 6-4 "Configurable stop responses").
S Alarm message:
Alarms 27001 "defect in a monitoring channel" and C01711 "SI motion defect in
a monitoring channel" are displayed.
For further diagnostics, for Alarm 27001, a fine error coding is displayed in the
alarm line. The fine coding for the drive alarm can be found in r9725 "SI motion
diagnostics for STOP F".
The significance of the error code is provided in Section10.2 under Alarm 27001
"Defect in a monitoring channel".
A delay time before STOP B is initiated can be parameterized using MD 36955
$MA_SAFE_STOP_SWITCH_TIME_F. During this time, the machinery construc-
tion OEM can initiate an NC controlled response, e.g. ESR. After this time has ex-
pired, the involved axis is braked with STOP B. This is also true if, in the mean-
time, a stop with a higher priority than STOP F (STOP E, D, C) is present. The
system variables $VA_XFAULTSI and $A_XFAULTSI, bit 1 can be used to detect
whether a STOP F was initiated that is then followed by a STOP B. In the delay
time up to the STOP B, an ESR or braking along the programmed path can be initi-
ated (e.g. by writing to $AC_ESR_TRIGGER or initiating an external STOP D).
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
Safety Functions Integrated in the System/Drive
6.3 Safe stops A-F
6-127