HEIDENHAIN TNC 122 Technical Manual - Manual (Page 18)

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TNC 122 9 Machine Integration 17
Traverse direction
Machine parameters MP210 and MP1040 define the axis traverse direction. The traverse directions
for the axes on numerically controlled machine tools are specified in DIN.
MP210 defines the counting direction of the encoder signals. The counting direction depends on the
mounting configuration of the encoders.
MP210
Counting direction of encoder signals
Input values: 0 to 7
Bit 0 Axis X +0 = positive
+1 = negative
Bit 1 Axis Y +0 = positive
+2 = negative
Bit 2 Axis Z +0 = positive
+4 = negative
MP1040 defines the polarity of the nominal voltage for positive direction of traverse.
MP1040
Polarity of the nominal voltage with positive direction of traverse
Input values: 0 to 7
(must be "0" if MP70 is on "1" or "2")
Bit 0 Axis X +0 = positive
+1 = negative
Bit 1 Axis Y +0 = positive
+2 = negative
Bit 2 Axis Z +0 = positive
+4 = negative
Assignment of encoder inputs
The individual axes can be assigned to the encoder inputs X1 to X3 with machine parameter MP110.
MP110
Assignment of axes to encoder inputs
Input values: 0 to 2
0 = encoder input X1
1 = encoder input X2
2 = encoder input X3
MP110.0 Axis 1
MP110.1 Axis 2
MP110.2 Axis 3
9.2 Traverse Ranges
The traverse ranges are set with machine parameters. The traverse ranges are defined by software
limit switches. The input values for the software limit switches are based on the scale datum.
If the machine moves to a software limit switch, the following error message appears:
LIMIT SWITCH <axis>...
and the corresponding marker is set (M2624 to M2629).