23 – 394 HEIDENHAIN Service Manual iTNC 530
With the logic diagram you can check the chronological switching behavior of the MB keys:
8 Switch on the machine.
8 Press the EMERGENCY STOP button.
8 Call the logic diagram. --> See “The LOGIC diagram” on page 11 – 125.
8 Define the INPUTs for the following recording.
8 Start the recording.
8 Press the keys. --> The respective inputs must change to 1!
Exception: I147 = NC STOP, changes to 0 when actuated (broken wire interlock!)
Figure: Recording of NC START and NC STOP buttons in the logic diagram
If a key does not produce a reaction of the control, one does not know, whether the
pushbutton itself or the machine operating panel PCB, the MB cable or the control is
defective.
If required, further tests can be performed. --> See following descriptions!
To Next Page
Loading...
