Minor Faults/Alarms - YASKAWA GA700 Technical Manual

6.5 Minor Faults/Alarms

6.5

Minor Faults/Alarms

This section explains the causes and possible solutions when a minor fault or alarm occurs. Remove the cause of
the fault referring to the following table.
Code Name
AEr Station Address Setting
Error
Note:
If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
Code Name
bAT Voltage of keypad's battery
deficient
Note:
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• Use o4-24 [bAT Detection selection] to enable/disable bAT detection.
Code Name
bb Baseblock
Note:
A minor fault signal will not be output even if the drive detects this minor fault.
Code Name
boL BrakingTransistor Overload
Fault
Note:
If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
Code Name
bUS Option Communication
Error
296
Cause
Option card node address is outside of
the acceptable setting range.
Cause
The voltage of keypad's battery is
reduced.
Cause
External baseblock command was
entered via one of the multi-function
digital input terminals S1 to S8, and the
drive output interrupted as indicated by
an external baseblock command.
Cause
The duty cycle of the braking transistor
is high (the regeneration power or
repetition frequency is high).
The braking transistor protective
function is enabled when a regenerative
converter is being used.
The braking transistor in the drive is
broken.
Cause
The communications cable wiring is
incorrect.
There is a short circuit or disconnection
in the communications cable.
Communication data error occurred due
to noise.
The option card is not properly
connected to the drive.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Possible Solution
• For CC-Link communication, set F6-10 [CC-
Link Node Address] correctly.
• For MECHATROLINK communication, set F6-
20 [MECHATROLINK Station Address]
correctly.
• For CANopen communication, set F6-35
[CANopen Node ID Selection] correctly.
Possible Solution
Replace the keypad's battery.
Possible Solution
Check external sequence and baseblock command
input timing.
Possible Solution
• Install a braking unit (CDBR series).
• Install a regenerative converter.
• Lengthen the deceleration time.
Set L8-55 = 0 [InternalBrakingTransistorProtect =
Disable].
Replace the entire drive.
Possible Solution
Correct any wiring errors.
• Repair disconnected cables and short circuits for
proper wiring.
• Replace a faulty communications cable with a
normal one.
• Check the control circuit lines, main circuit
lines, and ground wiring, and minimize the
effects of noise.
• Check whether an electromagnetic contactor is
the noise source, and use 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.
Mount the option card to the drive correctly.