Position Monitoring - HEIDENHAIN iTNC 530 Technical Manual
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Also See for iTNC 530:
- User manual (745 pages) ,
- Service manual (696 pages) ,
- Operating instructions manual (54 pages)
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6.11.1 Position Monitoring
February 2002
The axis positions are monitored by the iTNC as long as the control loop is
closed.
The input values for position monitoring depend on the maximum possible
following error (servo lag). Therefore the input ranges for operation with
following error and velocity feedforward are separate.
For both modes of operation there are two range limits for position monitoring.
If the first limit is exceeded, the error message EXCESSIVE SERVO LAG IN
<AXIS> appears. The machine stops.
You can clear this message with the CE key. An actual-to-nominal value
transfer is then executed for the respective axes.
If the second limit is exceeded, the error message EXCESSIVE SERVO LAG IN
<AXIS> appears. The control-is-ready signal output is reset.
You cannot clear this message. You must restart the control to correct the
error.
7
In the machine parameters given below, define two range limits for position
monitoring in each operating mode.
7
Adjust the input values to the machine dynamics.
If blocked axes are the cause of the erasable error message EXCESSIVE
SERVO LAG IN <AXIS>, a nominal velocity value may freeze, since the machine
axes can no longer be moved:
7
In MP1150.0, specify the time after which the nominal velocity value is to
be deleted. After this time has expired, the actual position value is assumed
as nominal position value. Before this time has expired, the error message
cannot be cleared with the CE key. - At this time the actual position value is
assumed as nominal value, and the nominal velocity value is deleted.
7
In MP1150.1, enter the time period for which the monitoring function is to
remain off after the fast PLC input from MP4130.0 has been set. The
monitoring functions reactivate after expiration of this time.
7
In MP1150.2, specify the minimum time period after expiration of the time
from MP1150.1 for which the monitoring functions should remain effective
(e.g. if the input changes quickly).
OFF
Monitoring Functions
6 – 163
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