Siemens SINUMERIK 840D sl Function Manual page 24

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2.1 NC/PLC interface signals

If a machine axis is in follow-up mode, the following monitoring mechanisms will not act:

• Zero-speed monitoring

• Clamping monitoring

• Positioning monitoring

Effects on other interface signals:

• DB31, ... DBX60.7 = 0 (position reached with exact stop fine)

• DB31, ... DBX60.6 = 0 (position reached with exact stop coarse)

DB31, ... DBX1.5 / 1.6 (position measuring system 1 / 2)

2 measuring systems can be connected to one machine axis, e.g.,

• Indirect motor measuring system

• Direct measuring system on load

Only one measuring system can be active at any one time. All closed-loop control,

positioning operations, etc. involving the machine axis always relate to the active measuring

Position measuring system 1 and 2

The table below shows the functionality of the interface signals in conjunction with the "servo

Basic logic functions: Various NC/PLC interface signals and functions (A2)

Function Manual, 11/2006, 6FC5397-0BP10-2BA0

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