1. BeforeUsingtheProduct
1.1 AbouttheOperationManual
Thismanualexplainsthecommunicationfunctionofthe TTX-800(hereinafterreferredtoasthe“Product”).
1.2 Things theCommunicationFunctionCanDo
The unitisequippedwith RS-485fordatacommunicationwiththehostcomputer,whichallowsusers towriteand read
toitems ofthis productthataredescribedin“6.ListofIdentifiers(Codes),” such as“To change,start,orstop itemsthat
canbeoperatedthroughfrontkeys”and“Toreadtheinformationthatcanbedisplayedonthedisplaysection.”
Provided,however,that sincetheRAMofthisproductisusedduringthereading/writingofdata through ordinary
command, datathatwas writtenwillbereplacedbythepreviousdata(datathatissavedinEEPROM)ifthepoweris
turned OFFand then turned ON.
Tosavethe writtendataintoEEPROM ofthisproduct, executethesaverequest message.
（See“3.3.4”and“3.4.4,” ThingstobeNotedDuringCommunication)
Furthermore,unnecessarysettingitems,such asitemsthatarerelated totheunattachedoption,willnotbereadand
written.
1.3 Position(Priority)ofCommunication
Thisproductallowstheusertochangedataandparametersthrough thekeyeven duringoperationunder
communicationmode.
Changeofsettingsofdataandparametersviacommunicationwillbedisabled whiletheproductisoperatedunder RO
(ReadOnly).
(Provided,however, thatswitching ofcommunicationmodeispossible.)
1.4 SettingstoBeMadePriortoCommunication
Severalsettingsneedtobemadetothisproductforittoperformacommunicationfunction.See
“2. SettingtheMODBUS Communication.”
