350 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
6.5 Alarm Detection
6.5 Alarm Detection
Alarm Codes, Causes, and Possible Solutions
Alarms are drive protection functions that do not necessarily cause the drive to stop. Once the cause of an alarm is
removed, the drive will return to the same status is was before the alarm occurred.
When an alarm has been triggered, the ALM light on the digital operator
display blinks and the alarm code display
flashes. If a multi-function output is set for an alarm (H2- = 10), that output terminal will be triggered.
Note: If a multi-function output is set to close when an alarm occurs (H2- = 10), it will also close when maintenance periods are
reached, triggering alarms LT-1 through LT-4 (triggered only if H2- = 2F).
Table 6.16 Alarm Codes, Causes, and Possible Solutions
Digital Operator Display Minor Fault Name
AEr
Station Address Setting Error (CC-Link, CANopen, MECHATROLINK)
Opti
on card node address is outside the acceptable setting range.
Cause Possible Solutions
Minor Fault
(H2- = 10)
Station number is set outside the possible setting
range.
• Set parameter F6-10 to the proper value if a CC-Link option card is used.
• Set parameter F6-35 to the proper value if a CANopen option card is used.
YES
Digital Operator Display Minor Fault Name
bb
Baseblock
Drive ou
tput interrupted as indicated by an external baseblock signal.
Cause Possible Solutions
Minor Fault
(H2- = 10)
External baseblock signal was entered via one of the
m
ulti-function input terminals (S1 to S8).
Check external sequence and baseblock signal input timing.
No output
Digital Operator Display Minor Fault Name
boL
Braking Transistor Overload Fault
The braki
ng transistor in the drive has been overloaded.
Cause Possible Solutions
Minor Fault
(H2- = 10)
The proper braking resistor has not been ins
talled. Select the optimal braking resistor.
YES
Use a regen converter, regen unit, braking unit, or
ot
her device to connect the +1 or +3 terminal to the -
terminal.
Set L8-55 to 0 to disable Internal Braking Transistor Protection.
The braking transistor’s use rate is high (i.e., the
regen converter is large or the repetition frequency is
high).
• Change to a CDBR type braking unit.
• Change to a regen converter.
• Increase the deceleration time.
The braking transistor inside the drive is faulty. Replace the drive.
Digital Operator Display Minor Fault Name
bUS
Option Communication Error
• After initial communication was est
ablished, the connection was lost.
• Assign a Run command frequency reference to the option card.
Cause Possible Solutions
Minor Fault
(H2- = 10)
Connection is broken or mast
er controller stopped
communicating.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and sho
rt circuits. Repair as needed.
YES
Option card is damaged. If there are no problems with the wirin
g and the fault continues to occur, replace the option card.
The option card is not properly connected to the
drive.
• The connector pins on the option card are not properl
y lined up with the connector pins on the drive.
• Reinstall the option card.
A data error occurred due to noise.
• Check options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit wiring, main circuit lines and ground wiring.
• Try to reduce noise on the controller side.
• Use surge absorbers on magnetic contactors or ot
her equipment causing the disturbance.
• Use recommended cables or some other type of s
hielded line. Ground the shield to the controller side or on the
input power side.
• All wiring for comm. devices should be separated from d
rive input power lines. Install an EMC noise filter to the
drive input power.
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