№
SX-DCT00221 -
36-
Panasonic Corporation
Trip
number
(RS485)
Display
on the
digital
keypad
Protective function
Causes
Countermeasure
21
E-HO
Homing error
(E-HO)
The motor trips when homing speed is 0,
or when home cannot be detected alt-
hough the motor shaft rotates more than
parameter (Pr43) in homing operation, or
when setting of sensor is abnormal
Investigate the setting of parameter,
home sensor, and wiring of home sensor.
22
E-OF
∗
Present position
overflow error
(E-OF)
The motor trips after homing is com-
pleted, if present position exceeds 32767
rotations.
Check the setting of parameter. (It can be
made ineffective by Pr4A.)
23
E-LT
Hardware limit error
(E-LT)
The motor trips after homing is com-
pleted, if hardware limit sensor is de-
tected.
Check the installation of sensor, and set-
ting of parameter.
-
E_Cn
Digital keypad com-
munication error
(E_Cn)
It occurs when the digital keypad and mo-
tor cannot communicate normally. (This is
a trouble on digital keypad side. It does
not affect motor operation.)
It can be cleared by reconnecting the dig-
ital keypad. Make sure that digital keypad
and motor are connected normally.
90
E-UPr
∗
User parameter
error
(E-UPr)
Parameter data saved in EEPROM is ab-
normal.
Check all parameters again and set them
again. If this protection works frequently,
failure is possible.
91
E-SPr
∗
System parame-
ter error
(E-SPr)
Internal parameter data saved in
EEPROM is abnormal.
Failure is possible.
1
E-CS
∗
Sensor error
(E-CS)
The amplifier trips when trouble of CS
sensor signal is detected.
1
Malfunction due to external noise is pos-
sible. Investigate for noise source in the
vicinity and eliminate such source.
2
Inter-
nal circuit may be in failure.
Other
numbers
Err
∗
System error
(Err)
The motor trips when trouble of control
microcomputer is detected.
‐‐‐‐‐
0
Normal condition
-
-
When any of protective functions marked with
∗
operates, trip reset by the procedure of
1
on page 45.
1
10
100
1000
100
110
120
130
140
150
160
170
180
190
200
Trip time(s)
Torque reference
Time characteristics of over load protection
More than 200 W
100 W
50 W