FAQ: Can the MP920 change the parameters in an SGDH amplifier?
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Yes, an MP920 with an SVB Module can read/write SGDH parameters via the register OLxx35. Depending on the motion command code, the OLxx35 register can hold three different types of data:
1. When Motion Command Code (OWxx20) is set to 17 (read servo parameter) or 18 (change servo parameter), OLxx35 contains the servo drive parameter number. Bits 0-11 are the Pn number and bits 12-15 are the number of words.
When reading, the value of the servo parameter is stored in Pn Constant Read Data register ILxx28.
When writing, the value stored in Pn Constant Change Data register, OWxx36, is written to the amplifier.
2. When Motion Command Code (OWxx20) is set to 19, OLxx35 contains the current servo drive alarm monitor number. The Alarm code is found in the Servo Drive Alarm Code Register, IWxx24.
3. When Motion Command Code (OWxx20) is set to 20, OLxx35 contains the current servo drive alarm history monitor number. When specifying a number between 0-9, the alarm code corresponding to the specified monitor number is stored in the Servo Drive Alarm Code Register, IWxx24.
Example for reading Torque Reference Filter Time Constant, Pn401:
1. Set OWxx35 to H1401. The first three nibbles have the parameter number 401 and the last nibble specifies the number of words, in this case 1 (0~65535)
2. Change OWxx20 to 17. This will read the value of Pn401 and store it in the Pn Constant Read Data register, ILxx28.
Example for writing Torque Reference Filter Time Constant, Pn401:
1. Set OWxx35 to H1401. The first three nibbles have the parameter number 401 and the last nibble specifies the number of words data, in this case 1 (0~65535)
2. Set the Pn Constant Change Data register, OWxx36, to the new value for the torque reference filter time constant, Pn401.
3. Change OWxx20 to 18. This will copy OWxx36 register value to Pn401.
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Please read and understand the product instruction manual before installing, servicing or operating Yaskawa products. FAQ content and illustrations are provided as technical advice to augment the information in manual, not supersede it. It is not possible to give detailed instructions for all types of installation or support activities. The information described in the FAQs are subject to change without notice to improve the product or FAQ. Yaskawa assumes no responsibility for errors or omissions or damages resulting from the use of the information contained in any FAQ. All warnings, cautions and product instruction for product use must be followed. Installation, operation and maintenance should be carried out by qualified personnel. Failure to observe these and other precautions highlighted in the product manuals will expose the user to high voltages resulting in, serious injury or death. Qualified personnel are defined as individuals who are familiar with the installation, starting, operation and maintenance of Yaskawa products of the type described and have proper qualifications to perform the work.
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