Author: Philip, S.
Paper Title Page
TUPHA024 ModBus/TCP Applications for CEBAF Accelerator Control System 424
 
  • J. Yan, S. Philip, C. Seaton
    JLab, Newport News, Virginia, USA
  
  Mod­bus-TCP is the Mod­bus RTU pro­to­col with the TCP in­ter­face run­ning on Eth­er­net. In our ap­pli­ca­tions, an XPort de­vice uti­liz­ing Mod­bus-TCP is used to con­trol re­mote de­vices and com­mu­ni­cates with the ac­cel­er­a­tor con­trol sys­tem (EPICS). Mod­bus soft­ware pro­vides a layer be­tween the stan­dard EPICS asyn sup­port and EPICS asyn for TCP/IP or se­r­ial port dri­ver. The EPICS ap­pli­ca­tion for each spe­cific Mod­bus de­vice is de­vel­oped and it can be de­ployed on a soft IOC. The con­fig­u­ra­tion of XPort and Mod­bus-TCP is easy to setup and suit­able for ap­pli­ca­tions that do not re­quire high-speed com­mu­ni­ca­tions. Ad­di­tion­ally, the use of Eth­er­net makes it quicker to de­velop in­stru­men­ta­tion for re­mote de­ploy­ment. An eight-chan­nel 24-bit Data Ac­qui­si­tion (DAQ) sys­tem is used to test the hard­ware and soft­ware ca­pa­bil­i­ties.
Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. 		 
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA024  
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