Calibration
AG25, AG26 Date: 09.07.2018 Art. No. 88094 Mod. status 225/18 Page 24 of 109
5 Calibration
Calibration is only possible when no travel job is active!
Two steps are required for executing calibration:
Write calibration value: see Calibration Value (Object 260Eh)
Execute calibration (software command or calibration input)
Calibration can be performed by a positive edge at control word bit 15, or initiated by writing
the value 7 to parameter S-Command (Object 2C01h) Alternately, a digital input can be
configured as calibration input as well.
Since the measuring system is an absolute system, calibration is necessary only once with
commissioning. With calibration, the calibration value is adopted for calculation of the
position value. The following equation is applied in case of calibration:
Position value = 0 + Calibration Value (Object 260Eh) + Offset Value (Object 261Ch)
6 External gear
If an external gear is used, a factor can be programmed via the parameters Gear Ratio
Numerator (Object 260Bh) and Gear Ratio Denominator (Object 260Ch) in order to include the
gear ratio in position sensing.
Example (see Fig. 12: external ):
The actuator is operated on a gear with transmission reduction of 5:1. For this purpose, the
Gear Ratio Numerator and Gear Ratio Denominator parameters must be programmed as follows:
Parameter Gear Ratio Numerator = 5
Parameter Gear Ratio Denominator = 1
Fig. 12: external gear
Input of an odd transmission reduction value is possible according to the following example:
Transmission reduction = 3.78
Parameter Gear Ratio Numerator = 378
Parameter Gear Ratio Denominator = 100
gear
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