HEIDENHAIN iTNC 530 Service Manual page 403

The function of most handwheel keys can be checked with the respective PLC marker. Use the
Checking the keys
PLC diagnosis functions TABLE or LOGIC DIAGRAM:
July 2010
Switch on the machine.
Press the EMERGENCY STOP key.
Activate the HR 420 (press the handwheel symbol on the HR 420). -->
The window Handwheel active appears on the screen.
Call the table with the PLC markers or the logic diagram.
--> See "Diagnosis Tools in the PLC Mode" on page 11 – 119.
Press the handwheel keys.
Check whether the corresponding markers are set (following table).
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