№
SX-DCT00221 -
35-
Panasonic Corporation
List of protective functions
Trip
number
(RS485)
Display
on the
digital
keypad
Protective function
Causes
Countermeasure
2
E-LV
Undervoltage error
(E-LV)
The amplifier trips when internal DC volt-
age (voltage of smoothing capacitor of
power supply) is below specified value.
Product of 100 V: Approx DC85 V
Product of 200 V: Approx DC170 V
Investigate the condition of wiring and
power supply.
3
E-OV
Overvoltage error
(E-OV)
The amplifier trips when internal DC volt-
age (voltage of smoothing function of
power supply) rises and exceeds speci-
fied value.
Product of 100 V: Approx DC205 V
Product of 200 V: Approx DC410 V
It is possible that deceleration time is too
short. Set longer deceleration time.
Not compatible with continuous lowering
operation.
－
LED
flashes
Overload warning
(Electronic thermal)
When load factor exceeds 100, the elec-
tronic thermal relay operates and monitor
display flashes. It is an alarm for elec-
tronic thermal trip.
Reduce the load.
Check the load factor in monitor mode.
4
THr
Overload error (Elec-
tronic thermal relay)
(THr)
The motor trips when torque reference is
output continuously
above 115.
Investigate the cause of overload, and
reduce the load, change the operating
pattern by making acceleration and de-
celeration time longer, or apply design to
increase the capacity of motor.
5
E-OS
Overspeed error
(E-OS)
The motor trips when rotation speed (ac-
tual speed) exceeds specified value.
Approx 6000r/min
Ensure that the actual speed does not ex-
ceed rated rotation speed, such as over-
shooting by unmatching between load
and gain.
6
E-POS
Position error
(E-POS)
The motor trips when position error (dif-
ference between command position and
actual position) is greater than Pr39
×
8
[pulses].
Check the parameter again and adjust
gain.
7
E-PO
∗
Position error
counter
overflow
(E-PO)
The motor trips when the position error
exceeds 8388607 [pulse].
Check the parameter again and adjust
gain.
8
E-OC
∗
Overcurrent error
(E-OC)
The amplifier trips when the motor cur-
rent exceeds specified current.
1
Excessive acceleration/ deceleration
setting is possible.
Set longer acceleration/ deceleration
time.
2
Failure of internal circuit is possible
9
E-OH
Overheat error
(E-OH)
The motor trips when the temperature in
control section rises above specified
value.
Approx 105
℃
Check the ambient temperature and
cooling condition of motor. Check the
load factor. If the ambient temperature is
low enough, and the protection occurs
soon after power-on, failure is possible.
10
E-OL
External forced trip
(E-OL)
The motor trips when external forced trip
input turns on.
Turn off external forced trip input, and re-
set tripping.
11
CAU
∗
Setting change
warning (CAU)
It occurs when parameter copying func-
tion on digital keypad is completed nor-
mally.
Also, when STOP key on digital keypad
is pressed, the motor trips and stops.
It is not abnormal. Execute trip reset.
12
E-485
RS485 communica-
tion error
(E-485)
The motor trips when communication er-
ror of RS485 communication function oc-
curs.
Check for noise problem in the vicinity.
(See "Information
−
Communication" on
page 65 for detail.)
20
E-rU
Command execution
error
(E-rU)
The motor trips when data is abnormal in
executing an operation instruction (set-
ting speed is 0, and travel distance is
32767 rotations or more).
Check the setting of parameter.
