Siemens SINUMERIK 840D Function Manual

Detailed description
2.5 Referencing with distancecoded reference marks
Basic logic functions: Reference Point Approach (R1)
28 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Warning
After determining the absolute offset and the entry in MD34090, the reference point
traversing for the machine axis must be carried out once more.
Referencing methods
Referencing with distance-coded reference marks can be performed in one of two ways:
• Evaluation of two consecutive reference marks:
MD34200 $MA_ENC_REFP_MODE (referencing mode) = 3
Advantage:
– Short travel path
• Evaluation of four consecutive reference marks:
MD34200 $MA_ENC_REFP_MODE = 8
Advantage:
– Plausibility check by NC is possible
– Increase in reliability of referencing result

Siemens SINUMERIK 840D Specifications

General

Series	SINUMERIK 840D
Axes	Up to 31
Channels	Up to 10
Operating System	Windows-based
Power Supply	24 V DC
Control Unit Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
Interpolation	Spline
PLC	Integrated PLC
Data Storage	CompactFlash, USB