Technical Manual TNC 360 - heidenhain - DR. JOHANNES ...

1.1.3 Encoder monitoring
HEIDENHAIN contouring controls can monitor the signal transmissions of the measuring system.
This measuring system monitoring must be activated by a machine parameter.
Three different conditions can be checked:
Error message
The absolute position of distance-coded reference marks C
The amplitude of the measuring system signals A
The edge separation of the measuring system signals B
If one of the conditions is not fulfilled, it results in the error message:
"Measuring system defect A/B/C."
For sinusoidal signals the LE monitors the amplitude of the measuring system signals, for squarewave
signals the LE evaluates the fault detection signal (U aS) of the external electronics (EXE or
IBV).
MP30 Checking the absolute position of the distance-coded reference marks
Input range: 0 to 15
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 4th axis +0 = not active
+8 = active
MP31 Checking the amplitude of the measuring system signals
Input 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 4th axis +0 = not active
+8 = active
Bit 4 Axis S +0 = not active
+16 = active
4-8 TNC 360 1 Machine Axes 8/95