Omron ES100 - 2.1 Introduction to BCD Communications

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1.㌫=三
∀・:"・
■
:llヴ＼ll/. ,∋∴・㌧i∴1:1
▲2!露「醒1‖声11r置=1re◎d亀】‖《=き星置◎薗声k
騒W抽量総唱C欝"BCDCOfpmunicati◎ns"isamethodoft郷mittingsingleitemsofBCD
e⑪瀟瀟踊c登蜘総㌘"(bina・y‑c・d・ddecimai)趣・vi・the聯亘豆鋤磁・fthePLC(P・◎9・ammable
}ogiccentroiler).
8bit
[一一亘§L』」
C◎mmandtypesaredesignatedbyaHexadecimal2‑digitc。deca1亘edthe
"DSLcode。"
4‑digitdata
10310210'100
5肋bit=sign
1竿≒閤
1‑digitdata
口
Dataishandledi垣一,2‑or4‑digitsetsdependingonthecommandtype,For
example,datasuchaseveRtsettingsthatissignificantwhenexpressedby
f◎urdigitsishandiedasa4‑dig輌tdataset.Ontheotherhand,datasuchas
errorcodesthatissignificantwhenexpressedbyonedigit輌shandledas
independentdataitemsofonedigiteach.
Thoughdataismadeupoffivebits,thesthbitisusedasthesignwhenthe
4thb輌tof4‑digitdataisset.
When岨tingdata,theDSLcodeandwritedataaresimultaneouslyoutput
fromthePLC,andtheES100retumsthereaddataandtheresponse.
Whenco㎜unicationendsnormaUy,thecontentofthewritedataandread
datamatch,anda"normalend"isindicatedintheresponsecode.
Whenreadingdata,theDSLcodeisoutputfromthePLC,andtheES100
returnsthereaddataandtheresponsecode.
醐enco㎜unicationendsno㎜ally,thecontenωfthe岨tedataandread
datamatch,andtheresponsecodeindicatesa"n◎rmalend."
團P【露Cc◎nditi◎醗s
ThePLCrequiresaprogramforacquiringmemoryareaforcommands鋤d
reSponseS,andgeneratingSignalsfOrSatiSfyingOperatingt量mingCe"dStionS.
950utputportsand8inputportsarerequired.
PLCOutputp◎π;ES100
15>
lnputpo内
K8
PowerSUPP}y
・24v>

Ab◎し技◎◎ntroller
type
Thec◎ntroUertypeforBCDc《)mmtm▲cationsisES100[コー口口口口E
Theexpandedl/OconnectorisusedforBCDcommunications.However.as
thesamete㎜inalsareusedfordigitalI/0,switchtoBCDcommunications
の
mparameters・
Fosdetaiis◎nh⑰w飽sw輌9cht◎BCDcommunic劔ions,se￠2.2Preparations,
2‑2
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