แหล่งศึกษาข้อมูล modbus

• https://riverplusblog.com/2011/08/18/plc-protocol-การสื่อสารแบบ-modbus-protocol/
• http://automationreview.blogspot.com/2013/10/modbus-protocol.html
• https://www.omi.co.th/th/article/modbus
• http://www.thailandindustry.com/indust_newweb/articles_preview.php?cid=19155
• https://www.lcdtvthailand.com/webboard/index.php?topic=394118.0
• http://home.hit.no/~hansha/documents/industrial_it/resources/resources/modbus/Modbus%20Overview.pdf
• https://www.csimn.com/CSI_pages/Modbus101.html
• https://www.rtaautomation.com/technologies/modbus-rtu/

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