A3: Axis Monitoring, Protection Zones
2.2 Axis monitoring
Basic Functions
98 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
• Changing of the software limit switch (1st ↔ 2nd software limit switch)
If the actual position of the machine axis after changing lies behind the software limit switch, it is stopped with
the maximum permissible acceleration.
• Overrunning the software limit switch in JOG mode
If the position of the software limit switch is reached and renewed pressing of the traversing button should
cause further travel in this direction, an alarm is displayed and the axis is not traversed farther:
Alarm 10621 "Channel <Channel number> Axis <Axis identifier> is at the software limit switch <Direction>"
2.2.7 Monitoring of the working area limitation
2.2.7.1 General
Function
The "working area limitation" function can be used to limit the traversing range of a channel's geometry and
special axes to a permissible operating range. The function monitors compliance with working area limits both in
AUTOMATIC mode and in JOG mode.
The following versions are available:
• Working area limitation in the Basic Coordinate System (BCS)
The traversing range limits are specified relative to the Basic Coordinate System.
• Working area limitation in the workpiece coordinate system (WCS) or adjustable zero system (AZS)
The traversing range limits are specified relative to the workpiece coordinate system or to the adjustable zero
system.
The two types of monitoring are independent of each other. If they are both active at the same time, the
traversing range limit which most restricts the access will take effect, depending on the direction of travel.
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