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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 error counter. The
scale ratios set by Pr46 through Pr4B (numera-
tor of 1st to 4th command scale) are not cor-
rect.
When Pr76 (scale error invalidation) = 0, and
the driver is operated under the full-closed and
hybrid control with an external 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 storage
area of the EEPROM is broken, so erroneous
data is retrieved.
The check code of the EEPROM is broken, so
erroneous data is retrieved.
Both the CW and CCW over-travel limits are not
active.
Countermeasures
Reduce the multiplication factor by adjusting the
values of Pr46 through Pr4B, and then adjust
the scale ratios so that the command pulse fre-
quency 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 connections 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 supply that
constitute the circuits. Check that the control
power (12 to 24VDC) can be established with-
out delay. Check the value of Pr04. Correct the
wiring, if necessary.
Important information
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