Siemens SINUMERIK 840D Description Of Functions page 248

4 Data Descriptions
4.2 Machine data for SIMODRIVE 611 digital
$MD_SAFE_POS_TOL. If this value is exceeded, STOP F is initiated with fine
code 3 or 44-57 (actual value comparison or dynamic limit value comparison).
1350 $MD_SAFE_MODE_SWITCH_TIME
Tolerance time for SGE changeover
Unit: Default:
ms 500
Timer for SGE changes. The timer is started every time new SGEs are
accepted. The new monitoring functions are immediately active, however, the
crosswise comparison of the result lists, position actual value and dynamic
position limit values must be delayed for a specific time as the two monitoring
channels cannot detect the SGE changes at precisely the same time.
1351 $MD_SAFE_VELO_SWITCH_DELAY
Delay time speed changeover
Unit: Default:
ms 100
Timer for the SGE delay timer.
The timer is started at the transition from the safely-reduced speed function to
the safe operating stop mode or when the speed monitoring limit is reduced to
a lower speed. During this period, the last selected SG limit remains active.
Example:
1.
2.
3.
1352 $MD_SAFE_STOP_SWITCH_TIME_C
Transition time from STOP C to safe operating stop
Unit: Default:
ms 100
When the time in this timer expires, a transition is made from STOP C (initiated
by SG or SE) to SBH.
After the time has elapsed, the axis/spindle is monitored for a safe operating
stop. If it has still not reached zero speed, a STOP A or STOP B is initiated.
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Minimum value: Maximum value:
0 10 000
Note
System-dependent minimum tolerance time:
2 x PLC cycle time (maximum cycle) + 1 x IPO cycle time
The variations in runtime in the external circuitry (e.g. relay operating times)
must also be taken into account.
Minimum value: Maximum value:
0 10 000
The timer is interrupted as soon as a higher or identical SG limit (i.e. to that
which was previously active) is selected.
The timer is immediately stopped if a changeover is made to "non-safe
operation" (=NSB SGE "de-select SBH/SG=1).
The timer is restarted if an SG limit, lower than the one previously active, is
selected or a changeover made to SBH while the timer is running.
Minimum value: Maximum value:
0 10 000
611 digital
Relevant for:
FD/MSD
Data type: Becomes
float effective:
POWER ON
611 digital
Relevant for:
FD/MSD
Data type: Becomes
float effective:
POWER ON
611 digital
Relevant for:
FD/MSD
Data type: Becomes
float effective:
POWER ON
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11.03