Alarm Detection; Alarm Detection; Alarm Codes, Causes, And Possible Solutions - YASKAWA A1000 HHP Programming Manual

2.5

Alarm Detection

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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-oo = 10), that output terminal will be triggered.
Note:
If a multi-function output is set to close when an alarm occurs (H2-oo = 10), it will also close when maintenance periods are reached,
triggering alarms LT-1 through LT-4 (triggered only if H2-oo = 2F).
Digital Operator Display
Cause
Station number is set outside the possible
setting range.
Digital Operator Display
Cause
External baseblock signal was entered via
one of the multi-function input terminals
(S1 to S8).
Digital Operator Display
Cause
The proper braking resistor has not been
installed.
Use a regen converter, regen unit, braking
unit, or other device to connect the +1 or +3
terminal to the - terminal.
The braking transistor's use rate is high
(i.e., the regen converter is large or the
repetition frequency is high).
The braking transistor inside the drive is
faulty.
Digital Operator Display
Cause
Connection is broken or master controller
stopped communicating.
Option is damaged.
The option is not properly connected to the
drive.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Table 2.11 Alarm Codes, Causes, and Possible Solutions
Station Address Setting Error (CC-Link, CANopen, MECHATROLINK)
AEr
Option card node address is outside of the acceptable setting range.
• Set parameter F6-10 to the proper value when using a CC-Link option.
• Set parameter F6-35 to the proper value when using a CANopen option.
Baseblock
bb
Drive output interrupted as indicated by an external baseblock signal.
Check external sequence and baseblock signal input timing.
Note: Baseblock alarm "bb" will not activate a digital output programmed for minor fault
H2-0o = 10. Set H2-0o = 8 or 1B to activate a digital output for "bb".
Braking Transistor Overload Fault
boL
The braking transistor in the drive has been overloaded.
Select the proper braking resistor.
Set L8-55 to 0 to disable Internal Braking Transistor Protection.
• Change to a CDBR type braking unit.
• Change to a regen converter.
• Increase the deceleration time.
Replace the drive.
Option Communication Error
bUS
• The connection was lost after initial communication was established.
• Assign a Run command frequency reference to the option.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
If there are no problems with the wiring and the fault continues to occur, replace the option.
• The connector pins on the option are not properly lined up with the connector pins on the drive.
• Reinstall the option.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions

2.5 Alarm Detection

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