Siemens SINUMERIK 840D Description Of Functions page 68

3 Safety-Related Functions
3.1 Basic mechanisms of SI functions
Table 3-3 Overview of stop responses
STOP Action
A Pulses are immediately cancelled
B 0 speed setpoint is immediately
entered
+ start timer t
B
< n
t =0 or n
B act shutdown
C 0 speed setpoint is immediately
entered
+ start timer t
C
t =0: Activation of SBH
C
D Brake motor along acceleration
limit
+ start timer t
D
t =0: Activation of SBH
D
E Causes stop and retract
+ start timer t
D
t =0: Activation of SBH
D
F Depending on situation:
a) Safety function inactive:
Saved message to operator
b) Safety function active:
Initiation of STOP B/A
(configurable)
c) Safety function active and
initiation of STOP C, D or E:
Saved message to operator
Note:
The timers can be set using the machine data.
The following diagram shows the relationship between the stop responses and
Stop responses SBH
and SH the safe operating stop (SBH) or the safe standstill (SH).
Fig. 3-7
3-68
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Effect
Drive coasts to standstill
Drive is braked along
current limit
transition to STOP A
: STOP A
Drive is braked along
current limit
SBH active
Drive is braked as part of a
group along set traversing
path
SBH active
Drive is decelerated via the
programmed retraction and
stop motion (ESR).
SBH active
a) NC start and traversing
interlock
b) Transition to STOP B/A
c) NC start and traversing
interlock
STOP A STOP B
Stop
Input
setpoint "0"
(Safe pulse disable)
Stop responses, safe operating stop (SBH), safe standstill (SH)
Initiated in Changes
response to
SBR/SG SH
SBH/SG SH
SG/SE SBH
SG/SE SBH
SG/SE SBH
Crosswise SH
data
comparison
STOP C STOP D STOP E
Stop Stop Stop
Input Path-relating Retraction
setpoint "0" in grouping conditions
SBH
(Safe standstill under position control)
(if a further error occurs)
SH
© Siemens AG 2003 All Rights Reserved
11.03
Alarm
to
POWER ON
POWER ON
RESET
RESET
RESET
a) RESET
b) POWER
ON
c) RESET
STOP F
STOPR_02.DSF