Panasonic minas a series Operating Manual page 70

Alarm
Protection
Code No.
Command The command pulse is larger than 500 kpps at
27
pulse sealer the entrance of the position error counter. The
error scale ratios set by Pr46 through Pr4B (numera-
tor of 1st to 4th command scale) are not cor-
rect.
External When Pr76 (scale error invalidation) = 0, and
28
scale error the driver is operated under the full-closed and
hybrid control with an external encoder, the scale
error input is OFF.
Error counter
29 The value of the position error counter is over
over flow
227 (134217728).
* External scale
The external scale is disconnected, or the scale
35
disconnection
fails.
error
* EEPROM
36
The data contained in the parameter storage
parameter
area of the EEPROM is broken, so erroneous
error
data is retrieved.
37
* EEPROM
The check code of the EEPROM is broken, so
check code erroneous data is retrieved.
error
38
Both the CW and CCW over-travel limits are not
Overttravel
active.
inhibit
Cause
- 69 -
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.