Panasonic MINAS A5 Series Operating Instructions Manual page 330

1. When in Trouble
Protective function (Detail of error code)
Error code No.
Protective
function
Main Sub
* 25
Hybrid
deviation
excess error
protection
Over-speed 26
protection
2nd Over-
speed
protection
Command 27
pulse input
frequency
error
protection
Electronic
gear error
protection
Pulse 28
regeneration
limit
protection
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6-8
Causes
0
and position of the motor by the
encoder slips larger than the setup
pulses with Pr3.28 (Setup of hybrid
deviation excess) at full-closed control.
of command division/multiplication is
changed or switched over.
0 The motor rotational speed has exceeded
the setup value of Pr5.13.
1 The motor rotational speed has exceeded
the setup value of Pr6.15.
0 The frequency of command pulse input is
more than 1.2 times the setting in Pr5.32.
2 Division and multiplication ratio which are
set up with the command pulse counts
per single turn and the1st and the 4th
numerator/denominator of the electronic
gear are not appropriate.
multiplied by the command division and
Noises mixed with the command pulse
input cause counting error.
0 The output frequency of pulse
regeneration has exceeded the limit.
Measures
and the load.
scale and the driver.
position (encoder feedback value) and
the load position (external scale feedback
value) is the same sign when you move the
load.
Check that the numerator and denominator
of the external scale division (Pr3.24 and
3.25) and reversal of external scale direction
(Pr3.26) are correctly set.
multiplication during full closed control.
and division/multiplication ratio.
has occurred due to a poor gain adjustment.
per the wiring diagram.
Check the command pulse input for
frequency.
ratio to a value as small as possible e.g.