July 2010 17 – 263
If the 24 V supply for the Control-Is-Ready output drops during machine operation, the
EMERGENCY STOP chain is interrupted. The EXTERNAL EMERGENCY STOP error message is
displayed:
Troubleshooting
8 Measure the voltage on X34.
8 Check the wiring. (Use the circuit diagram of the machine tool for this purpose.)
8 Examine the power supply units.
For this purpose the Control-Is-Ready signal output must be integrated correctly into the
EMERGENCY STOP chain. --> See “Annex: Principle of Function of the iTNC 530 Control”
on page 2 – 657, See “During Start-Up” on page 3 – 661!
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