Delem
V0614, 3.4
3. Key test
Function
This test is meant to check the functioning of all the frontpanel keys.
Description
First you see a matrix with all keys, like in figure 3.a.
Figure 3.a
•
Each time you press a key on the front, the corresponding position on the screen will
give a unique indication. Entering the key test will result that all LED’s in the mode keys
and start/stop keys on the frontpanel automatically will light-up (and stay on during the
diagnostic mode). You can test these mode keys and the start/stop keys by pushing the
corresponding keys. The result is that the corresponding key on the screen will light up.
•
The reading of the movement keys is tested by a counter. When you press the key ‘+’,
it must result in an increasing value on the screen (up counting). When you press the
key ‘-‘, it must result in a decreasing value on the screen (down counting).
•
The key lock status is displayed and can also be tested by turning the key from the ON
to the OFF position. In the ‘keylock is off’ position the program data cannot be changed.
Failure
A failure (a key is not operative) can be caused by the frontpanel electronics, the front cable
or the front interface on the mainboard.
End
Pushing the softkey ‘END’ finishes this test.
