YASKAWA CR700

6.5 Minor Faults/Alarms
364 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Code Name Causes Possible Solutions
The option card is damaged. if there are no problems with the wiring and the error continues to
occur, replace the option card.
Note:
• The drive detects this error if the Run command or frequency reference is assigned to the option card.
• If the drive detects this error, the terminal assigned to H2-01 to H2-05 = 10 [MFDO Function Select = Alarm] will be ON.
• Set the stopping method for this fault in F6-01 [Communication Error Selection].
Code Name Causes Possible Solutions
CALL Serial Comm Transmission Error
The communications cable wiring is incorrect. Correct wiring errors.
There is a short circuit or disconnection in the
communications cable.
• Repair disconnected cables and short circuits for proper
wiring.
• Replace a faulty communications cable with a normal one.
Programming error occurred on the controller side. Examine communications at start-up and correct programming
errors.
Communications circuitry is damaged. • Perform a self-diagnostics check.
• If the problem continues, replace the control board or the
entire drive. For information about replacing the control board,
contact Yaskawa or your nearest sales representative.
Termination resistor setting for MEMOBUS/
Modbus communications is incorrect.
Enable the termination resistor in the last drive in a MEMOBUS/
Modbus network by setting DIP switch S2 to the ON position.
Note:
• Detects if control data cannot be received from the controller correctly when energizing the drive.
• If the drive detects this error, the terminal assigned to H2-01 to H2-05 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name Causes Possible Solutions
CE Modbus Communication Error
The communications cable wiring is incorrect. Correct wiring errors.
There is a short circuit or disconnection in the
communications cable.
• Repair disconnected cables and short circuits for proper
wiring.
• Replace a faulty communications cable with a normal one.
Communication data error occurred due to noise. • Examine the control circuit lines, main circuit lines, and
ground wiring, and decrease the effects of electrical
interference.
• Make sure that a magnetic contactor is not the source of the
electrical interference, then use a Surge Protective Device if
necessary.
• Use only recommended cables or other shielded line. Ground
the shield on the controller side or the drive input power side.
• Separate all communication wiring from drive power lines,
and install a noise filter to the input side of the power supply
for communication.
• Minimize the effects of controller noise.
Communication protocol is incompatible. • Examine the values set in H5-xx.
• Examine the settings on the controller side and correct the
difference in communication conditions.
The time set in H5-09 [CE Detection Time] is too
short for the communications cycle.
• Change the controller software settings.
• Increase the value set in H5-09.
Something in the controller software or hardware is
causing a communication problem.
Examine the controller and remove the cause of the error.
Note:
• Detected if control data was not received correctly for the CE detection time set to H5-09.
• If the drive detects this error, the terminal assigned to H2-01 to H2-05 = 10 [MFDO Function Select = Alarm] will be ON.
• Set the stopping method for this fault in H5-04 [Stopping Method after Com Error].
Code Name Causes Possible Solutions
CnT1 Number of Driving Over
The number of accumulated motor 1 starts is more
than the setting value of S2-13 [Motor1 Number of
Driving Limit].
1. Inspect peripheral devices as necessary.
2. Set S2-09 [Motor1 Number of Driving start] = 0 to reset the
accumulated number of motor 1 starts.
Code Name Causes Possible Solutions
CnT2 Number of Driving Over
The number of accumulated motor 2 starts is more
than the setting value of S2-14 [Motor2 Number of
Driving Limit].
1. Inspect peripheral devices as necessary.
2. Set S2-10 [Motor2 Number of Driving start] = 0 to reset the
accumulated number of motor 2 starts.
Code Name Causes Possible Solutions
CnT3 Number of Driving Over
The number of accumulated motor 3 starts is more
than the setting value of S2-15 [Motor3 Number of
Driving Limit].
1. Inspect peripheral devices as necessary.
2. Set S2-11 [Motor3 Number of Driving start] = 0 to reset the
accumulated number of motor 3 starts.