Spindle Encoder Alarm; Handwheel Fault - Siemens SINUMERIK 808D Service Manual

3.7

Spindle encoder alarm

Fault description
The spindle cannot move, and the alarm 025000 appears on the screen at the same time.
Diagnostic steps
1. If you use an external encoder for the spindle, check whether the spindle
encoder interface X60 on the back of the PPU is loose or damaged.
2. Check whether the connection cable of the spindle encoder is damaged or connected incorrectly.
3. Check whether the settings of machine data MD30200 and MD30240 are correct as follows:
MD30200: number of encoders (= 1: for the spindle with an encoder; = 0: for the spindle without an encoder)
•
MD30240: encoder type (= 1: for the spindle with motor encoder; = 2: for the spindle with an external encoder via
•
X60)
4. Check whether the spindle encoder is damaged. Replace the encoder with a new one and test it again.
5. Replacement and maintenance are necessary if the fault still exists after the above inspection, because probably the
PPU is damaged.
3.8

Handwheel fault

Fault description
The handwheel is not available or cannot be assigned to an axis successfully.
Diagnostic steps
1. Check whether the operating sequence is correct, and whether the feed
axis is selected for handwheel assignment in the handwheel mode.
Use the PLC to monitor and test the PLC input/output status of the select-
ed axis traversing key.
2. Check whether the connections on the handwheel are correct, and observe if there are short circuits in adjacent con-
nections.
3. Check the interface X10 on the back of the PPU for the following:
Whether the connection is loose
•
Whether the cable is damaged
•
Whether there is voltage output of 5 V at the interface (terminal 5/6)
•
Service Manual
01/2017
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