−
69
−
Protection
Command
pulse sealer
error
External
scale error
Error counter
over flow
* External
scale
disconnection
error
* EEPROM
parameter
error
* EEPROM
check code
error
Overttravel
inhibit
Alarm
Code No.
27
28
29
35
36
37
38
Cause
The command pulse is larger than 500
kpps at the entrance of the position er-
ror counter. The scale ratios set by Pr46
through Pr4B (numerator of 1st to 4th
command scale) are not correct.
When Pr76 (scale error invalidation) = 0,
and the driver is operated under the full-
closed and hybrid control with an exter-
nal encoder, the scale error input is OFF.
The value of the position error counter is
over 227 (134217728).
The external scale is disconnected, or the
scale fails.
The data contained in the parameter stor-
age area of the EEPROM is broken, so
erroneous data is retrieved.
The check code of the EEPROM is bro-
ken, so erroneous data is retrieved.
Both the CW and CCW over-travel limits
are not active.
Countermeasures
Reduce the multiplication factor by ad-
justing the values of Pr46 through Pr4B,
and then adjust the scale ratios so that
the command pulse frequency is 500
kpps or less.
Check the reason why the CN I/F Pin 33
is OFF.
Check that the motor operates per the
position command pulse. See the torque
monitor to check that the output torque
does not get saturated. Readjust the
gains. Maximize the value of Pr5E (torque
limit set-up). Correct the encoder wiring
per the wiring diagram.
Check the power supply for the external
scale. Correct the wiring and SIG connec-
tions per the wiring diagram.
Set all the parameters again. If this error
occurs frequently, the driver may have
been broken. Replace the driver with a
new one. Return the old driver to the sales
agent for repair.
The driver may have been broken. Replace
the driver with a new one. Return the old
driver to the sales agent for repair.
Check the switches, wires and power sup-
ply that constitute the circuits. Check
that the control power (12 to 24VDC) can
be established without delay. Check the
value of Pr04. Correct the wiring, if nec-
essary.
Important
information
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