网络资讯
https://docs.arduino.cc/learn/communication/modbus/
Administrator
https://community.parker.com/technologies/electromechanical-group/electromechanical---industrial/w/electromechanical-knowledge-base/2232/modbus-basics
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https://www.inhand.com/en/support/blogs/what-is-modbus/
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https://us.store.codesys.com/canopen-example.html
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https://canopen.readthedocs.io/en/latest/sdo.html
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https://canopen-stack.org/v4.4/usage/architecture/
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https://www.piher.net/wp-content/uploads/Piher_CANOpen_PROTOCOL_V0.pdf
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https://canopen.readthedocs.io/en/latest/profiles.html
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https://crosscontrol.com/manual/fieldbus%20access%20online%20documentation/content/appendix/canopenerrors.html
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https://developer.apple.com/documentation/storekit/externallinkaccount/4047546-canopen
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https://www.ixxat.com/products/software-and-tools/protocol-sw-and-apis/canopen-master-api
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https://stackoverflow.com/questions/77189621/details-about-canopen
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https://infosys.beckhoff.com/content/1033/fbb-x510/9169765771.html
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https://electronics.stackexchange.com/questions/664658/how-does-canopen-support-many-devices-with-limited-pdo
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