HEIDENHAIN TNC 306 Technical Manual - Manual (Page 108)

4-8
TNC 406/TNC 306 1 Machine axes 3/97
The NC uses markers to tell the PLC in which direction the axes are to travel (only active in the
operating mode "Manual"):
0 = positive
1 = negative
Set Reset
M2160 Direction of traverse
X axis NC NC
M2161 Y axis
M2162 Z axis
M2163 Axis 4
M2164 * Axis 5
1.1.3 Encoder monitoring
HEIDENHAIN contouring controls can monitor the signals from the encoders. This function must be
activated by a machine parameter.
Two different conditions can be checked:
Error
message
The amplitude of the encoder signals A
The edge separation of the encoder signals B
If one of these conditions is not fulfilled, the error message "Encoder defect A/B" will appear.
MP31 Checking the amplitude of the encoder signals
Entry range: 0 to 31
Bit 0 X axis +0 = not active
+1 = active
Bit 1 Y axis +0 = not active
+2 = active
Bit 2 Z axis +0 = not active
+4 = active
Bit 3 Axis 4 +0 = not active
+8 = active
Bit 4 * Axis 5 +0 = positive
+16 = negative
*
only TNC 406