HEIDENHAIN TNC 335 Technical Manual - Manual (Page 211)

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TNC 360 6 Display and Operation 8/95
6.3.2 Display mode and traverse direction for rotary axes
Machine parameter MP7470 determines the traverse direction for absolute positioning and the
display mode for rotary axes.
– Display from +0 to +359.999°: After a full turn the display value jumps back to 0°. In this
operating mode it is not possible to set software limit switches.
During absolute programmed movements of rotary axes (including PLC positioning) the table now
takes the shortest path to the target position, provided that Bit 1 of MP 7470 is set. For
incrementally programmed movements, however, the table moves according to the sign of the
programmed value.
– Display from –30 000° to +30 000°: In this operating mode software limit switches may be
entered. Absolute positional values from – 30 000° to + 30 000° can be programmed (166
revolutions).
MP7470 Display mode for rotary axis
Input values: 0 to 3
Bit 0: +0 = 0 to + 359.999° (no software limit switches)
+1 = –30 000° to +30 000° (software limit switches active)
Bit 1: +0 = Absolute positioning of rotary axes takes the programmed direction to
the target position
+2 = Absolute positioning of rotary axes takes the shortest direction to the
target position