Checking The Outputs - HEIDENHAIN iTNC 530 Service Manual

23.5 Checking the Outputs

The MB 420 and the MB 520 features 8 PLC outputs which serve, for example, to control the
lamps of the buttons.
These outputs are located on the connecting line of the MB control and also on the following
terminal blocks:
With the table for the PLC outputs you can check the condition of the outputs:
You can now find out, e.g., whether a lamp is defective or is not controlled correctly.
Figure: Observation of the lamp for the button "Control On" in the PLC table
July 2010
MB 420
Terminal X4
1
2
3
4
5
6
7
8
9
-
DANGER
Be sure to ascertain which function of the output to be inspected has on the machine.
Call the table with the PLC outputs. --> See "The TABLE function" on page 11 – 119.
Establish the conditions for setting the output concerned (keystroke, function call, etc.). Ask
the machine operator.
The output must change condition.
MB 520 Pin layout
Terminal X12
1 O0
2 O1
3 O2
4 O3
5 O4
6 O5
7 O6
8 O7
9 0 V
10 + 24 V
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