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

An external STOP E can also be initiated in the drive monitoring channel from the PLC-SPL
CDC - or the PROFIsafe/FSEND-FRECV communication interface on the PLC side.
Note
STOP E only produces a different response than STOP D if the user has configured the ESR
function - extended stop and retract - and initiation of the ESR is programmed depending on
$VA_STOPSI or $A_STOPESI.
If ESR is not active, the STOP E behaves like a STOP D. However, if the ESR configuration
is incorrect, there is a delay of up to 2 IPO cycles compared to STOP D until the braking
operation is initiated. Possible causes:
● The initiation of the ESR as static synchronous action does not take into account the system
variables $VA_STOPSI or $A_STOPESI.
● ESR is neither parameterized nor enabled.
● For individual PLC controlled axes, only the axis-specific ESR is used via
$AA_ESR_TRIGGER. This trigger may be used in addition to the channel-specific trigger.
For other incorrect ESR programming, a delay by the time entered in
$MC_ESR_DELAY_TIME1 and $MC_ESR_DELAY_TIME2 is possible. After these times have
expired, braking is initiated at the current limit. Possible cause:
● The retraction position cannot be reached within the specified time.
Note
The drive-based ESR can be initiated by writing to system variable $AN_ESR_TRGGER. The
STOP E delay time in MD36954 $MA_SAFE_SWITCH_TIME_E or drive parameter in p9554
should be selected, so that it covers the timers for ESR (these are defined in parameter p0892
of the SINAMICS basis system).
See also Chapter "Delayed pulse cancellation in the event of communication failure
(Page 758)"):
7.3.8

Description of STOP F

The STOP F response is permanently assigned to the error handling (e.g. the crosswise result
and data comparison, detecting communication and encoder faults).
If such as fault/error state is detected, then the following responses are triggered.
Response if no safety-related functions are active:
Faults/errors are also detected if none of the safety-related functions are active (safety
functions are SBH, SG, SE, SN, n<n
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 machining. A
system restart is prevented by an internal NC start/traversing inhibit function. Dormant faults/
errors are detected on the drive and control sides.
Response if one safety-related function is active:
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety functions integrated in the system/drive
synchronization). The saved message "defect in a
x
7.3 Safe Stops A-F
127