HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 253)

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TNC 407/TNC 415/TNC 425 6 Display and operation 01.98
MP7296 Set datum point with axis keys
Entry: 0 or 1
0 = datum point can be set with axis keys and soft key.
1 = datum point can only be set with soft key.