168
When in Trouble
Protective
function Causes Measures
Error
code No.
36
*EEPROM
parameter
error 
protection
Data in parameter storage area has been damaged
when reading the data from EEPROM at power-on. • Set up all parameters again.
• If the error persists, replace the driver (it may be a
failure.) Return the product to the dealer or
manufacturer.
37
*EEPROM
check code
error 
protection
Data for writing confirmation to EEPROM has been
damaged when reading the data from EEPROM at
power-on.
Replace the driver. (it may be a failure). Return the
product to a dealer or manufacturer.
Emergency
stop input
error
protection
39 When the emergency stop input (EMG-STP: CN X5 Pin
2) has turned off, the system trips regarding it as an
error.
•
Check the switch power supply and cable connected to
the emergency stop input for error.
•
Check that the emergency stop input (CN X5 Pin 2)
turns on.
•
Check that the rising time of the control signal cable (DC
12 to 24 V) at the power supply on is not slower than
that of the servo driver.
Absolute
system
down error
protection
40 Voltage of the built-in capacitor has fallen below the
specified value because the power supply or battery
for the 17-bit absolute encoder has been down.
After connecting the power supply for the battery, clear
the absolute encoder. (Refer to P.138, "Setup
(Initialization) of Absolute Encoder" of Operation
Setting.) You cannot clear the alarm unless you clear
the absolute encoder.
*Absolute
counter
over error
protection
41 Multi-turn counter of the 17-bit absolute encoder has
exceeded the specified value. • Set up an appropriate value to SV.Pr0B (Absolute
encoder set up) .
• Limit the travel from the machine home position within
32767 revolutions.
Absolute
over-speed
error
protection
42 The motor speed has exceeded the specified value
when only the supply from the battery has been
supplied to 17-bit encoder during the power failure.
• Check the supply voltage at the encoder side
(5V±5%)
•
Check the connecting condition of the connector, CN X6.
• You cannot clear the alarm unless you clear the
absolute encoder.
*Absolute
single turn
counter
error
protection
44 Single turn counter error of 17-bit absolute encoder
has been detected.
Single turn counter error of 2500[P/r], 5-wire serial
encoder has been detected.
Replace the motor.
*Absolute
multi-turn
counter
error
protection
45 Multi turn counter error of 17-bit absolute encoder has
been detected.
Multi turn counter error of 2500[P/r], 5-wire serial
encoder has been detected.
Replace the motor.
Absolute
status error
protection
47 17-bit absolute encoder has been running at faster
speed than the specified value at power-on. Arrange so as the motor does not run at power-on.
*Encoder 
Z-phase
error
protection
48 Missing pulse of Z-phase of 2500[P/r], 5-wire serial
encoder has been detected The encoder might be a failure. Replace the motor.
*Encoder
CS signal
error
protection
49 CS signal logic error of 2500[P/r], 5-wire serial encoder
has been detected The encoder might be a failure. Replace the motor.
35
*External
scale com-
munication
error 
protection
Communication between the external scale and the
driver has been interrupted in certain times, and
disconnection detecting function has been triggered.
• Make a wiring connection of the external scale as per
the wiring diagram. 
• Correct the miswiring of the connector pins. 
•
Secure the power supply voltage DC 5 V±5% (4.75 to
5.25 V) for the external scale ... pay attention especially
when the external scale connection cables are long.
<Remarks>
When the protective function with a prefix of "*" in the protective function table is triggered, you cannot clearwith alarm clear input.