Machine Data Does Not Exist 2 - 5; Measurementsystem; Reference Point Does Not Exist 2 - 5; 2.7.4 Teach-In On - Siemens SIMATIC S5 Manual

2.7.1 Machine Data does not Exist
The bit indicating that machine data does not exist is only cleared in the axis attributes (check-
back signals) when the machine data for an axis is transferred. The machine data which is then
located on the module, may, however, still contain errors. This is ignored at this point. Operating
instructions only cause the axis to move when the machine data is free of errors.
2.7.2

MeasurementSystem

In the test display of COM247, the dimensional unit is displayed beside the actual position value
and the distance to go.
2.7.3 Reference Point does not Exist
Movements to an absolute target are only possible when a coordinate system has been fixed.
The coordinate system is fixed using mode BA5, "reference point approach" or "set reference
point", Following this, the axis attribute indicating the absence of the reference point is reset.

2.7.4 Teach-in on

The axis attribute "teach-in on" indicates that the current actual position values of the axis can be
stored in a machining program as target information (X-functions). Teach-in is activated with
mode BA1 O and deactivated with mode BA11.
2.7.5 Reference Point Synchronized
This axis attribute indicates that the counters of the excitation pattern in the power unit and on
the 1P are to be synchronized in the "reference point approach" mode. This information is stored
in the machine data. The counters are synchronized when the IP247 and power unit are switched
on together. If the IP247 recognizes that the power unit has been switched off, (monitoring input
on the power unit) the synchronization is lost. Once the I P247 recognizes that the power unit has
been switched on again, the synchronization is re-established.
Axis Attributes
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