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Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

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9.2 Online Autotuning9.2.3 Selecting the Online Autotuning Execution MethodThere are three methods that can be used for online autotuning: At start of operation, constantly, and none. Theselection method is described next.Pn110Online Autotuning SwitchesSpeedPositionSetting Range Setting Unit Factory Setting Setting Validation− − 0010 After restartParameterMeaningPn110 n.0 Online autotuning is performed only after the first time power is turned ON. (Factory Setting)n.1 Online autotuning (moment of inertia calculations) is performed continuously.n.2 Online autotuning is not performed.The factory setting is n.0. This setting is recommended for applications in which the load moment of inertia does notchange much or if the load moment of inertia is not known. The inertia calculated at the beginning of operation is used continously.In this case, differences in machine status and operation references at the beginning of operation may cause minordifferences in the calculation results of the load moment of inertia, causing differences in the servo responsiveness eachtime the power supply is turned ON.If this occurs, overwrite the moment of inertia ratio in Pn103 using the utility function Fn007 (Writing to EEPROMmoment of inertia ratio data obtained from online autotuning), and set Pn110 to n.2 to disable online autotuning.The setting n.1 is used when the load moment of inertia varies constantly. This setting enables a consistent responsivenesseven when the load moment of inertia changes. If the load moment of inertia changes in less than 200 ms, however,the autotuning accuracy will deteriorate, in which case Pn110.0 should be set to 0 or 2.The setting n.2 is used when online autotuning is not possible, when the load moment of inertia is known and themoment of inertia ratio is set in Pn103 to perform the adjustment manually, or any other time the online autotuning functionis not going to be used.99-7

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