ABB Error 50387 — Cartesian Soft Servo close to unstable

What it means · Ce que ça veut dire

Cartesian Soft Servo close to unstable — ABB robot hardware event on the boardsian Soft Servo close to unstable (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

Cartesian Soft Servo is close to unstable. The robot is halted as a security measure. Le texte constructeur de ce code n'existe qu'en anglais dans les manuels ABB dont il provient. Il est reproduit tel quel ci-dessus ; le manuel de votre robot fait foi.

What to check · Que vérifier

• Inspect the boardsian Soft Servo close to unstable, its wiring and connections first.
• Match this code against your robot's event-log timeline before swapping parts.
• Follow the French field checks below — they are the tested sequence for this fault.
• probable : The system damping is too low.
• The damping is calculated from a ratio of stiffness.
• Change the value of 'Stiffness' or 'StiffnessNonSoftDir' in the CSSAct instruction.
• If that does not help increase the value of the system parameter 'Damping stability limit' or change the parameter 'Stiffness to damping ratio' in topic Motion and type CSS.

Frequently asked · Questions fréquentes

What does ABB error 50387 mean?

ABB 50387 (“Cartesian Soft Servo close to unstable”): Cartesian Soft Servo close to unstable — ABB robot hardware event on the boardsian Soft Servo close to unstable (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

How do you troubleshoot ABB error 50387?

Inspect the boardsian Soft Servo close to unstable, its wiring and connections first. Match this code against your robot's event-log timeline before swapping parts. Follow the French field checks below — they are the tested sequence for this fault.

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