Siemens SINUMERIK 840D sl Function Manual page 94

Detailed description
2.1 Axis monitoring
2.1.5.5 Customized error reactions
Customized zero-mark monitoring
You can customize the default alarm and reaction behavior of zero-mark monitoring using
system variables. This allows you to perform your own monitoring using a synchronized
action or OEM application and to use all of the reaction options available in this application,
e.g.:
• Transmit alarm
• Use cycles (e.g., approach tool-change position)
• ...
Example:
Users can adjust the alarm and reaction behavior so that when machining an expensive
workpiece, which could be damaged if the axis is stopped as a result of an alarm, machining
stops before the machining quality of the workpiece is assessed using appropriate
synchronized action commands.
Effectivity
Customized monitoring can be activated in parallel to or as an alternative to standard zero-
mark monitoring, depending on the setting in machine data:
MD36310 $MA_ENC_ZERO_MONITORING (Zero-mark monitoring)
MD36310
0
> 0
100
If both monitoring functions are active (MD36310 > 0), you can perform cascaded
monitoring.
Example:
If a value falls below the threshold specified in MD36310, customized monitoring triggers a
prewarning; standard zero-marking monitoring will only detect a fault if the threshold is
exceeded and will then deactivate automatically.
System variables
You can implement customized error reactions using the following system variables:
Measuring systems with incremental encoders
28
Meaning
Customized monitoring is active, standard zero-mark monitoring is deactivated.
Customized monitoring and standard zero-mark monitoring operate in parallel.
All encoder monitoring functions are deactivated.
Basic logic functions: Axis monitoring, protection zones (A3)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0