ABB DSTA171 3BSE018311R1 controller module

This means it is now possible: • to handle singleturn encoders as absolute encoders and • to switch absolute encoder evaluation for multiturn encoders off Programmable drive-internal position resolution The resolution of the drive-internal position data is no longer dependent on the motor encoder type, but can be set via parameter S-0-0278, Maximum travel range. The maximum resolution is 215 per encoder period, minimum 2². The computed resoluton for encoders 1 and 2 is displayed in parameters S-0-0256, Multiplication 1 und S-0-0257, Multiplication 2.

The drive-internal position resolution mentioned

 here does not here the format and unit in which the position data are displayed. This is still set in parameter S-0-0076, Position data scaling type. The drive-side resolution in form of the number of increments per motor revolution of a rotary motor encoder, for example, is computed in terms of S-0-0116, Feedback 1 Resolution * S-0-0256, Multiplication 1. The function supports • the increase of drive-internal resolution of position data with small travel paths and high resolution requirements as well as • to decrease the resolution in favor of the possible travel range. Note: The per "Load default value" activated resolution generally meets demands in terms of possible travel range with sufficiently large position resolution.

Current Limits 

The dynamic current limit no longer implements the overload factor P-0- 0006, Overload factor, but rather the temperature model of the amplifier powerstage and the motor. In parameter P-0-4046, Active peak current maximum available current, including limits, is displayed by the dynamic current limit. In P-0-4045, Active permanent current the available continuous current is displayed. This value depends on the set switching frequency

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