HEIDENHAIN iTNC 530 Service Manual page 229

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The corresponding PLC outputs do not function. Depending on the PLC program of the machine

manufacturer, corresponding PLC error messages are displayed.

Functional control

Ensure that:

If this is not the case.

Monitoring the PLC outputs. --> see "The TABLE Function" on page 10 – 76.

The green LEDs on X6 pin9 and pin10 of the I/O modules PLD16-8 are lit.

The green LED POWER ON on the basic module PLB 510 is lit.

Measure whether the 24 V supply voltages are available as indicated above.

If the LEDs are not lit up, despite available power supply, the basic module PLB 510 or the

corresponding I/O module PLD 16-8 is probably defective.

Troubleshooting