MODBUS APPLICATION AT JEFFERSON LAB

Conference · Thu Feb 01 00:00:00 EST 2018

DOI:https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA024· OSTI ID:1425927

Yan, Jianxun ^[1]; Seaton, Chad ^[1]; Philip, Sarin ^[1]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Modbus is a client/server communication model. In our applications, the embedded Ethernet device XPort is designed as the server and a SoftIOC running EPICS Modbus is the client. The SoftIOC builds a Modbus request from parameter contained in a demand that is sent by the EPICS application to the Modbus Client interface. On reception of the Modbus request, the Modbus server activates a local action to read, write, or achieve some other action. So, the main Modbus server functions are to wait for a Modbus request on 502 TCP port, treat this request, and then build a Modbus response.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1425927
• Report Number(s): JLAB-ACE-17-2565; DOE/OR/23177-4249
• Resource Relation: Conference: 16th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2017) 08-13 Oct 2017. Barcelona, Spain
• Country of Publication: United States
• Language: English