[Isolate the Cause of the A.910 Alarm] │ ├──► Step 1: Monitor Motor Current (via Monitor Mode Un002 or SigmaWin+) │ ├── Current > Rated? ──► Go to Step 2 (Mechanical/Sizing) │ └── Current < Rated? ──► Go to Step 4 (Parameters/Wiring) │ ├──► Step 2: Disconnect Mechanical Load │ ├── Rotates Freely? ──► Check Sizing, Duty Cycle, or Acceleration │ └── Mechanics Bind? ──► Repair Ball Screws, Bearings, or Alignments │ ├──► Step 3: Check Enclosure Environment │ └── Temp > 55°C? ──► Replace Fans, Clean Filters, or Add AC │ └──► Step 4: Validate Drive Electricals & Parameters ├── Check Pn52B ──► Adjust Overload Warning Threshold └── Check Resistance ──► Test U, V, W Cable Continuity & Insulation
Ensure the cooling fans on both the SERVOPACK and the motor are functioning properly.
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A.910 can also appear in conjunction with other codes. In one documented field case, a Yaskawa Servopack SGDV-120A01AY101AA simultaneously generated both A.710 and A.910 alarms accompanied by severe motor instability—the motor started jerkily, responded with delay to motion commands, and stopped after a few seconds. Testing revealed a severe current asymmetry: while phases U and V each carried approximately 4 A, phase W showed only about 0.8 A. This phase current fault caused a distorted rotating field, triggering the overload warning and eventually the alarm.
Specifically, is an Overload Warning . Unlike a hard-stop alarm like A.710 or A.720, the A.910 code acts as an early-warning system. It indicates that the servomotor has been operating beyond its rated capacity, and if the condition is not addressed, it will eventually escalate into a fault that shuts down your machine. [Isolate the Cause of the A
Ensure all connections at the terminals are tight. Check the encoder cable for any signs of damage or interference. Poor encoder signals can cause the drive to "hunt" for position, increasing the current draw and triggering an overload. 3. Adjust Operating Conditions
Disconnect the motor from the load; manually rotate the shaft/axis. This public link is valid for 7 days
The term "Exclusive" in this context refers to the drive’s internal processing hierarchy. The drive has received a command (usually "Run" or "JOG"), but that command is currently "excluded" from execution because another process or safety condition has locked the control.