Siemens SINUMERIK 840D Description Of Functions page 82

3 Safety-Related Functions
3.2 External STOPs
If a stop request is active, SGA "STOP A/B is active" is set in the same way as
it would be for an internally triggered STOP A.
0 signal:
1 signal:
This SGE requests "braking with n
SGE
De-select ext. STOP C When this stopping type is triggered the safe braking ramp (SBR) is activated.
In addition, the time set in MD36952/1352:
$MA_/$MD_SAFE_STOP_SWITCH_TIME_C (transition time STOP C to safe
operating stop) is started.
When this time has elapsed the system automatically switches over to SBH.
If a stop request is active, SGA "STOP C is active" is set in the same way as it
would be for an internally triggered STOP C.
0 signal:
1 signal:
SGE "Braking along a path" can be requested via this SGE.
De-select ext. STOP D When ext. STOP D is triggered, the time set via MD 36953/1353 $MA_/
$MD_SAFE_STOP_SWITCH_TIME_D (transition time STOP D to safe
operating stop) is started.
When this time has elapsed the system automatically switches over to SBH.
If a stop request is active, SGA "STOP D is active" is set in the same way as it
would be for an internally triggered STOP D.
0 signal:
1 signal:
SGE STOP E only produces a different response than STOP D if the user has
De-select ext. STOP E configured the ESR function (extended stop and retract) and initiation of the
(SW 6.4.15 and higher) ESR is programmed depending on $VA_STOPSI or $A_STOPESI. If no ESR is
active, the STOP E behaves like a STOP D. If the ESR configuration is
incorrect however, there is a delay of up to 2 IPO cycles compared to STOP D
until the braking operation is initiated.
After these times have expired, braking is initiated at the current limit.
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
"Pulse cancellation" requested
"Pulse cancellation" not requested
"Braking with n
No request for "braking with n
Note
Stopping with external STOP A (pulse cancellation) has a higher priority and
can interrupt an external STOP C (braking at the current limit).
"Braking along a path" is requested
"Braking along a path" not requested
Note
Stopping with an ext. STOP A (pulse cancellation) and ext. STOP C (braking
at the current limit) has a higher priority and can interrupt an ext. STOP D
(braking along a path).
= 0" (braking at the current limit).
set
= 0" requested
set
= 0"
set
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11.03