适用于plc的工程应用人员
10)BFM#29Errorstatus
ErrorstatusintheVB-1HCcanbecheckedbyreadingthecontentsofb0tob7ofBFM#29toauxiliaryrelaysofthePLC.
BFM#29b0b1b2b3b4b5b6b7b8b9b10-b15
Errorstatus
Setwhenanyofb1tob7isON.
Setwhenthevalueoftheringlengthiswrittenincorrectly(otherthanK2toK65,536).Setwhenthepresetvalueiswrittenincorrectly.
WhenvalueringlengthinSetwhenthecomparevalueiswrittenincorrectly.
16-bitcountermode.
Setwhenthecurrentvalueiswrittenincorrectly.Setwhenthecounteroverflowstheupperlimit.Whentheupperorlowerlimitis
exceededona32-bitcounter.Setwhenthecounteroverflowsthelowerlimit.
SetwhentheFROM/TOcommandisusedincorrectly.Counterdatadoesn'tbeaccessby32bitSetwhenthecountermode(BFM#0)iswrittenincorrectly.WhenoutsideofK0toK11SetwhentheBFMnumberiswrittenincorrectly.WhenoutsideofK0toK31Undefined
Note:b9willalsobesetwhenaccesstoreservedareaorReadfromWriteonlyorwritetoreadonlyareas.
Thereerrorflagscanberesetbyb8ofBFM#4.
11)ModelidentificationcodenumberBFM#30
TheidentificationnumberforaSpecialFunctionBlockisreadbyusingtheFROMcommand.TheidentificationnumberfortheVB-1HCunitisK4010.
Byreadingthisidentificationnumber,theusermaycreatebuilt-incheckingroutinestocheckwhetherthephysicalpositionoftheVB-1HCmatchestothatofthesoftware.
PleaseusethefollowingprogramasaguidewheneveryouusetheVB-1HCunit.Otherinstructionstoreadthecurrentvalueofthecounter,statusetc.canbeaddedasrequired.
K0:BFM#0(CounterMode)K10:PRESETValue:16K12:YH1MatchValue:500K14:YH2MatchValue:1000X0:CountpermitX1:YH1outputpermitX2:YH2outputpermitX3:MutualResetX4:PRESETpermitX10:ClearERRORX11:YH1RESETX12:YH2RESETX13:YH1SETX14:YH2SETSendCommandK20:CURRENTValueK26:CompareresultsK27:TerminalstatusK29:ERRORstatus
K4:Mode4-->ABx4
5.1Preliminarychecks
1)CheckthattheI/OwiringandextensioncableoftheVB-1HCareproperlyconnected.
2)5V85mApowerissuppliedfromthemainorextensionunitsfortheVB-1HC.Checkthatthereisnopoweroverloadfromthisandotherextensionblocks.
3)Thecounterworkscorrectlyonlywhendatasuchasthecountermode(setwithapulsecommand),theTOcommand,thecomparevalue,etc.areappropriatelyspecified.Remembertoinitializethecount(BFM#4b0),preset(BFM#4b4),andoutput(BFM#4b2,b1)prohibits.ResettheYH1/YH2outputsbeforeyoustart.
5.2Errorchecking
ThefollowingLEDsonthemainpaneloftheVB-1HCmay
helpyoutotroubleshoottheunit.
UP,DN:Lightsuptoindicatewhetherthecounterisgoingup(UP)ordown(DN).
PRESETandDIS:TheappropriateLEDlightsupwhenthePRESETterminalortheDISABLEterminalisON.YH1,YH2:TheappropriateLEDlightsupwhenYH1/YH2outputisturnedon.Youcanchecktheerrorstatusbyreadingthecontent
ofBFM#29tothePLC.Errorcontentsareshowninsection3.3(10).