Checking The Outputs - HEIDENHAIN iTNC 530 Service Manual

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23.4 Checking the Outputs

The MB 420 is provided with 8 PLC outputs (e.g., the lamps of the buttons can be controlled).

These outputs are located on the connecting leads X1 and also on terminal block X4:

The function can be checked via the table for the PLC outputs:

You can now find out, e.g., whether a lamp is defective or is not controlled correctly.

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

Establish the conditions for setting the corresponding output (keystroke, function call, etc.).

If necessary, use the User's Manual or the circuit diagram of the machine or ask the machine

manufacturer.

The corresponding outputs must change the condition!

You can measure the output voltages, e.g. on terminal X4 of the MB 420 or via test adapter

on connector X1. --> see "Test Adapter, ID 375830-01" on page 29 – 456.