YASKAWA Sigma-7 SGD7S Series - Page 155

Parameter Meaning When Enabled Classification
Pn080
n.0
(default
setting)
Set a phase-A lead as a
phase sequence of U, V,
and W.
After restart Setup
n.1
Set a phase-B lead as a
phase sequence of U, V,
and W.
Use the following procedure to select the phase sequence for a Linear Servomotor.
1.
Set Pn000 to n.0 (Set a phase-A lead as a phase sequence of U, V, and W).
This setting is to make following confirmation work easier to understand.
2. Select Monitor in the Menu Dialog Box.
ð
The Operation Pane will be displayed so that you can check the feedback pulse
counter.
To check the feedback pulse counter with the Digital Operator, use Un00D
(Feedback Pulse Counter).
3. Manually move the Moving Coil from one end to the other of the stroke and confirm
that only the correct number of feedback pulses is returned.
If the correct number and only the correct number of pulses is returned, the signal is
being received correctly from the linear encoder ( Ä ‘Example’ page 156).
If the correct value is not displayed for the feedback pulse counter,
the following conditions may exist. Check the situation and correct
any problems.
– The linear encoder pitch is not correct.
If the scale pitch that is set in Pn282 does not agree with the
actual scale pitch, the expected number of feedback pulses will
not be returned. Check the specifications of the linear encoder.
– The linear encoder is not adjusted properly.
If the linear encoder is not adjusted properly, the output signal
level from the linear encoder will drop and the correct number of
pulses will not be counted. Check the adjustment of the linear
encoder. Contact the manufacturer of the linear encoder for
details.
– There is a mistake in the wiring between the linear encoder and
the Serial Converter Unit.
If the wiring is not correct, the correct number of pulses will not
be counted. Correct the wiring.
4. Manually move the Moving Coil in the direction of the cable and check the value of
the feedback pulse counter in the Operation Panel to confirm that it is counting up.
Cable for Linear Servomotor
Moving Coil
Fig. 108: Selecting the Phase Sequence for a Linear Servomotor
ð
Manually move the Moving Coil in the direction of the cable.
Related Parameters
Setting Procedure
Sigma-7 Series SERVOPACKs
Basic Functions That Require Setting before Operation
Selecting the Phase Sequence for a Linear Servomotor
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