ABB AM801F Axial displacement module

Driving profile generator Driving profiles are categorized in time-optimal and jerk-limited positioning. In the case of time-optimal positioning the maximum set acceleration is used for starting and braking. The drive approaches the target in the shortest time possible, the velocity profile is trapezoidal, and the acceleration profile is block-shaped. In the case of jerk-limited positioning the acceleration profile is trapezoidal and the velocity profile is therefore a curve of third order. Since the acceleration changes continuously, the drive is extremely gentle on the mechanics.

Absolute positioning In the case of absolute positioning the target position is a fixed (absolute) position referred to the zero or reference point. The target position is approached independently of the current position. In order to execute an absolute positioning we recommend prior referencing of the drive

Homing 

Every positioning control requires a defined zero at start-up, which is determined by means of a homing. The ARS 2100 SE series servo drives can do this homing on their own. As reference signals it evaluates different inputs, for example the limit switch inputs. A homing can be started by means of a command via the communication interface or automatically with the servo drive enabling. Optionally a start via a digital input can be programmed using the parameterisation program Metronix ServoCommander® , to carry out a specific homing independent of the servo drive enabling. The servo drive enabling acknowledges (with falling edge) for example error messages and can be switched off depending on the application, without requiring another homing with a new enabling. Since the existing digital inputs are used in standard applications, the use of the analogue inputs AIN 1, AIN 2 as digital inputs DIN AIN 1 and DIN AIN 2 as well as the digital outputs DOUT 2 and DOUT 3 as digital inputs DIN 10 and DIN 11 are optionally available.

Several methods

 as per the CANopen manual and following DSP 402 are implemented for the homing. Most methods first search for a switch at search velocity. The further movement depends on the method of communication. If a homing is activated via the fieldbus, there is generally no following positioning to zero. This is done optionally during the start via the servo drive enabling. A following positioning is always an option. The default setting is “no following positioning”. Ramps and velocities are parameterisable for the homing. The homing can also be time-optimal and jerk-limited.

Application industry

The products can be used in the following industries: power plant, paper making, steel, mining, rubber, water supply, cement, chemical industry, glass, printing

Textile, machinery, plastics, coatings, medicine, hospitals, food, hotels, scientific research institutions

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