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If you are seeing this error during development or commissioning, check the following:
The "Link" in "A910 Link" refers to the internal SPI (Serial Peripheral Interface) bus that connects the drive’s main logic board to the option slot. When the drive powers on or resets, it performs a handshake with any installed option card. If that handshake fails, the drive triggers A910.
To resolve A910, you must understand these specific Yaskawa parameters:
The A910 warning is triggered based on the internal calculation of the . The drive monitors the output current relative to the motor’s rated current and calculates an "I²t" (thermal) curve. yaskawa error code a910 link
The serial communications link has failed or is intermittent. This often happens with the RS-422/RS-485 connection to a remote keypad (like a JVOP-180) or a host controller (PLC, HMI).
This is the most common cause, where physical resistance in the system forces the motor to work too hard.
When operating Yaskawa servo drives—particularly in the Sigma-5 and Sigma-7 series—encountering a fault code can halt production instantly. The is a specific warning alarm that indicates a potential overload condition, often referred to in troubleshooting manuals as a precursor to a more critical failure (like A.710 or A.720). If you are seeing this error during development
Troubleshooting Yaskawa Error Code A910: Understanding Link Interruptions
When you see the A.910 warning on the drive's digital operator, the ALM (Alarm) LED light will usually . This distinguishes it from a full fault, where the ALM LED would remain constantly lit. Critically, the " Link " LED indicator, which shows communication status, might still be active or blinking normally, because the core issue is mechanical or electrical overload rather than a network problem.
As noted at the beginning, the "A910 link" search query is a common confusion stemming from the drive's "Link" status LED. It is essential to distinguish the A.910 overload warning from genuine communication errors, which have different codes and causes. To resolve A910, you must understand these specific
: Verify the setting of parameter Pn52B . If the application requires higher temporary torque, consider increasing this warning threshold within safe limits.
If left unaddressed, an A.910 alarm typically escalates into a full-system shutdown (such as an A.710 or A.720 overload fault) to prevent hardware damage.