FAQ: Is there a detailed procedure on how to read/write parameters from/to fieldbus NS-300/500 modules?
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Yes, attached are flowcharts of the parameter read/write sequence and ladder logic code for both operations.
The basic read operation sequence is as follows:
1. Set Mode bit to 1
2. Verify mode selection
3. Set parameter number
4. Set read command code [08h] and command start bit
5. Verify response commands and parameter number
6. Read response data
7. Set Mode bit to 0
The basic write operation sequence is as follows:
1. Set Mode bit to 1
2. Verify mode selection
3. Set parameter number & value
4. Set read command code [09h] and command start bit
5. Verify response commands, parameter number and value
6. Set Mode bit to 0
The ladder logic code provided is for an MP-XXXX controller with DeviceNet, acting as Master. The following register allocation was used:
IB00000: Executes the parameter read operation
IB00001: Executes the parameter write operation
IW0110-IW0113: allocated for NS-300/500 module input bytes
OW0100-OW0103: allocated for NS-300/500 module output bytes
MW05000: to set the parameter number
ML05002: parameter read data
ML05004: parameter write data
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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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