Siemens SINUMERIK 840D sl Function Manual

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Machine axis without position measuring systemFor a machine axis without a position measuring system (speed-controlled spindle), a statusequivalent to "parking" is activated by canceling the controller enable:● DB31, ... DBX2.1 (controller enable) = 03.2.9 Parking the passive position measuring system3.2.9.1 FunctionContrary to the "Parking a machine axis (Page 113)" function, for which all position measuringsystems of a machine axis are deactivated, using the "Park the passive position measuringsystem" function, users have the option, of only "parking" the passive position measuringsystem of a machine axis (i.e. to deactivate the encoder evaluation and monitoring in the driveand in the control), while the active position measuring system can remain operational.NoteFor an explanation of active/passive measuring system, refer to "Setpoint/actual-valuesystem (Page 336)".ApplicationThe "Park passive measuring system" function can, for example, be used in the following cases:● Changing attachment heads with and without integrated encoderUsing the "Park passive position measuring system" function, it is possible to mountattachment heads alternating with and without integrated encoder for different machiningtasks on the main spindle, without the missing encoder signals initiating drive and controlfaults.See also:– Example: Changing an attachment head for a direct position measuring system(Page 119)– Example: Changing an attachment head for two direct position measuring systems(Page 123)● Using linear position measuring systems, which are not available over the completetraversing range of a machine axisUsing the "Park passive position measuring system" function, it is possible to pass throughthe range outside the linear position measuring system, without the missing encoder signalsinitiating drive and control faults.See also:– "Example: Measuring system switchover when encoders are missing in certain partsof the range (Page 127)".A3: Axis Monitoring, Protection Zones3.2 Axis monitoring functionsBasic FunctionsFunction Manual, 01/2015, 6FC5397-0BP40-5BA2 115