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Plc tutorial

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Brian Qi
Brian Qi

The document provides an overview of using RSLogix software to program Allen-Bradley PLCs. It outlines the basic steps to start a new program, define inputs and outputs, download programs to the PLC, and use the program. Key steps include selecting the PLC model in a new file, adding logic to rungs using toolbar buttons, defining I/O addresses, verifying for errors, saving and downloading the program, and going online to monitor inputs and outputs. The tutorial is designed to introduce basic PLC programming concepts to new users.

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SouthernIllinois UniversityCarbondale Collegeof Engineering Department of Technology PLC ProgrammingTutorial Purpose: The purposeofthis tutorial is to give a briefintroduction to usingthe PLC trainersandthe RSLogix softwareavailableat SIUC. RSLogix is Windows based softwarethat is usedto programAllen-Bradley PLCs.This tutorial will give basic instructionson how to write anddownloadprograms. This will give new usersthe foundationto leam the many advancedfeaturesof RSLogix. Starting RSLogix From the desktopclick START>>Programs>>RockwellSoftware>>RSlogix 500 English>>. Click on RSLogix 500 English. WhenRSIogix startsclick the FILE headingandselectNEW or usethe shortcutkey that is identicalto the new file key in Microsoft Word. Whena new file is selectedthewindow in FigureI will open. Thiswindow is usedto configurethe programto a particularmodel of Allen BradleyPLC. The PLC usedis this tutorialis a Micrologix 1500seriesA. Themodelnumbersarelistedonthe sideofthe PLC. Usethe scroll to find the model of the PLC. Selectit usingthe mouse andclick OK 45 MXfrIU[TlltED | 5/01 CPU, tX h I 5/01Cm-1(h Xi@Iqix 1500 U bi6 C XifrIqix 1500 nP Sci.B B .1162 l|iEoLqir 1200 ht* B ,1762 Xieolalr l20o sli l .1761 Xirolqix 1000 balq .1?61 lieo(qr:1000Ol-agvffilcw .1761 Xidddis 1000 CffiiedW* i Dd0 R@n[nd nrtfiEc :l^q*-= F- gnH w"r*.. I li6-rs-t Figure l: ProcessorTypeWindow
RSLogix Interface The RSLogix interfaceis shownbelow. To beginconstructinga programclick on the number0000next to the first andonly blue rung. The numbershouldnow be inside of a red box. The red box meansthat the rung hasbeenselectedand canbe edited. Start by clicking the XIC button on the USER tool bar. Then click on the OUTPUT ENERGIZE button on the USER toolbar. Rung0000 shouldnow appearasit doesin the programbelow. Oncethereareinstructionsin rung 0000rung 0001will appearbelow it. Click on the 0001to selectthe rung. Click on the XIO andOUTPUT ENERGIZE buttonson the USER toolbar. Rung0001shouldnow appearrlsit doesin Figure 2. *db96ffirdffiH+ D dg at r brr n . f------ n ir r,Dt qqtr il*-l 31e i ;n*!m.m...ll$"**rruru Figure 1: RSLogix Interface ?:@l M .{ V*fJ$ r'cm 46 I cor* crqa:: S P,d*sd edus $ rt,orts t J b corqM $cmc-rqe- El sYso Bl sYsr' t w2- E c,os3R.Em6 fl o-urur D il-WI D s2-stAtus E a3-BWY O r., MR D cs. c@rER D s-cNRa E Nz-N'6EF 8l F "c$FwD O @-ortur O tr.@r - Jcdde.Mde O cwo,erhd -l Cdm6rdcdhddr .J R.cp. Md6 OUTPT]TENERGIZE BUTTON USf,R MEI{U TAB (Selectedby default)
Defining Inputs and Outputs (I/O) Using the left mousebutton,doubleclick on the logic symbolsto definethe VO address. When the symbols are selecteda box will appear(refer to Figure 3). Define input addressesfor XIO andXIC symbolsusing"I:0/0" format. Define output energize addressesusingthe "O:0/0" format. The capitalI andO standfor input andouqut, respectively. The first numberbeforethe forward slashis the slot numberandthe numberafter the slashis the point number. Make sureto not to useOs for 0sandvice versa. When all the VO addresseshavebeendefinedusethe VERIFY PROJECTbutton (shown in Figure 3) to check the program for errors. * E& h *rdr @ rool Yhdqi nf D l';E O I lbF n 'h..: 5rrBt QQtrl;;*1, > E!n {Errft<}oo II: D II:r**.- Uit |l*+1, gt $ I teoe{tkd.M.,.llERa"!..sm Figure l: Instruction Addressing '2:@l P : .l 9*fl* r:rrru 47 I ca'o *6." Sh@s'stu S r(erb' lll b c@iFdil !f cr'ggcorsam B sYso, F sYsr. 0 t*t- $ c.osrnoraco O @.wrrut El il -wr D s2. slau O $.EWY D r.. rMR O c5-cNF El m-cdnd O N7-N@F B .E.tr$iwD B @-Nru E n-@r - JCqnmHr@s O do-wH lCdmq#dMdt
Should there be a prograrn error, a window will appearat the bofiom of the screen. USethe "*" and"-" symbolsto expandthe errors. The expandedmessagewill statewhat rung and which instruction oontainsthe error (seeFigure 4). Double clicking on the expandedpart of the messagewill selectthe operation that hasthe error. B&2 i RnohrrRRc:hrJdm&d* Figure l: Eror Message If the progfam hasno errors the message"Verif hascompleted,no errors found'will appearabovethe Windows START button in the lower left hand corner of the screen(see Figure 5). tr'igure2: Verilied Frogram 48
Downloading Programs The next step is to download the program. To download the program the status menu is used. Atthis stagpin the program the statusmenu will show OFFLINE. To selectthe statusmenu click the arrow next to the menu that shows OFFLINE. Then selectdownload(seeFigure6). 0AEi.'i I rbl|io rr rgie rg t ; ;:ElTTi,-n*&:l-p::]{5slbl i * - *oit*<)o+rd I (ffiRwb $r.,*ro .lllp6rb,s H<morm Glsvso' E sYsr- i w2- E qetuiaro 8@-mr 3 n.wr E 9. srau E B.MY STATUSMENUARROW :',4 6 I .j tlhrererd-Ece..ll*rrqrru-|ru Figure l: Downloading a Program 49
Savinga Program In orderto downloada programit mustbe saved. If theprogramis not savedthe window in Figure 7 will openautomatically.Namethe progrcmandsaveit to a 3.5" floppy disk (Drive A). A programcanalsobe savedbeforetrying to downloadby using the FILE drop down menuor the SAVE shortcut,which areidenticalto the onesin Microsoft Word. P& A ssirl5t;i;E;-------l ttlll ttg j5.l 50 I pnOCnr_rt ::E;___ :,* | I nnfvfn | '*'uo lisii&iciiiisT---*-l m I H5 l lEFibt't6 ftFrrthc..cc.,I f S.Edrbr6-ddtu ftrcttufr aucrm: liiiiiiE6- sbr: rd l . q@cTF drB rhqi{TSEPS*C . H.YiinN& v*15'-j Figure l: Savlng a Program Downloading(Continued) After theprogramis savedthefollowing window will popup. Thewindow displaysthe programname,its origin anddestination.SelecttheYES buttonto proceed with the download(seeFigure8). I lrrd DownloadlngProgram (UNTITLED)forBJ.176{ Mkrolajx 1500LSPSeriesC To (UNTITLED)Bul.l76{ Micrologix1500L5PScricsC Driver;AB-DFl-latl,loda:I Areyousr.reyouwantboproceedwtt Download? lY*lNol Figure2: DownloadingProcedure
The next window that opensdisplaysthat thePLC is in remoterun mode. This meansthatthe PLC is in run mode. Whena PLC is in run modeit is executingthe currently loadedprogram. In orderto downloada new programto a PLC it must be in programmode. SelectYES to switchthe PLC to programmode(seeFigure 9). SLCi5in rEmobeRLt{ tnOOE. Procassr rnrs! ba swtdpd to ruroba PR0Gilrodr, contiila? f- Y* _l r,r" I Figurel: SwitchingfromRunModetoProgramMode The next window that will openis the downloadstatuswindow. This window displaysthe statusof the download(not pictured). Whenthe downloadis completethe window will automaticallycloseandthe next window will open. This window asksif the PLC shouldchangebackto run mode. SelectYES sothe PLC canswitch to run modeto executethe program(seeFigure 10). e -Effiilffi}li.'.' j A ChmrBo*,boRrnlrlodc? 1i..*.I8"..-il rlp I Figure 2: Switching back to Run Mode Dialogue The final window that popsup asksif the PC shouldgo online. When a PC is online with a PLC it meansthatthe PC is communicatingwith the PLC in realtime. In this modethe operatorat the PC canseethe programthat is beingexecutedandmonitor the statusofthe input andoutputpoints. This is a very usefulfeaturein manufacturing operationsbecauseit allows remotesupervisionandcontrol of the PLC. SeleciYES to go online with the PLC. Figure3: OnlineModeDialogue ! DoyflrHrnttogpftillru?
Using the Program At this point the program should be operating. Using the addressedinput buttons on the hainer observethe output lights on the trainer. Sincethe computer is also online the changing inputs and outputs canbe observedfrom the PC monitor. Editing the Program Usethe programstatusmenuto go offline. Click the arrow next to the menuand selectGO OFFLINE. Oncethe PC is offline with the PLC it is possibleto editthe program. Summary This tutorial hasbeendesignedto give a basicintroductionofPLC programming to the new user. There are many additional instructiong shortcutsand featuresin the RSLogix software that are similar to featuresfound in other Windows basedprognms. Many of the additional featurescanbe discoveredthrough additional useof RSLogix. To readmore aboutRSLogix visit: http://www.software.rockwell.com/rslogix/ 52

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Plc tutorial

  • 1. SouthernIllinois UniversityCarbondale Collegeof Engineering Department of Technology PLC ProgrammingTutorial Purpose: The purposeofthis tutorial is to give a briefintroduction to usingthe PLC trainersandthe RSLogix softwareavailableat SIUC. RSLogix is Windows based softwarethat is usedto programAllen-Bradley PLCs.This tutorial will give basic instructionson how to write anddownloadprograms. This will give new usersthe foundationto leam the many advancedfeaturesof RSLogix. Starting RSLogix From the desktopclick START>>Programs>>RockwellSoftware>>RSlogix 500 English>>. Click on RSLogix 500 English. WhenRSIogix startsclick the FILE headingandselectNEW or usethe shortcutkey that is identicalto the new file key in Microsoft Word. Whena new file is selectedthewindow in FigureI will open. Thiswindow is usedto configurethe programto a particularmodel of Allen BradleyPLC. The PLC usedis this tutorialis a Micrologix 1500seriesA. Themodelnumbersarelistedonthe sideofthe PLC. Usethe scroll to find the model of the PLC. Selectit usingthe mouse andclick OK 45 MXfrIU[TlltED | 5/01 CPU, tX h I 5/01Cm-1(h Xi@Iqix 1500 U bi6 C XifrIqix 1500 nP Sci.B B .1162 l|iEoLqir 1200 ht* B ,1762 Xieolalr l20o sli l .1761 Xirolqix 1000 balq .1?61 lieo(qr:1000Ol-agvffilcw .1761 Xidddis 1000 CffiiedW* i Dd0 R@n[nd nrtfiEc :l^q*-= F- gnH w"r*.. I li6-rs-t Figure l: ProcessorTypeWindow
  • 2. RSLogix Interface The RSLogix interfaceis shownbelow. To beginconstructinga programclick on the number0000next to the first andonly blue rung. The numbershouldnow be inside of a red box. The red box meansthat the rung hasbeenselectedand canbe edited. Start by clicking the XIC button on the USER tool bar. Then click on the OUTPUT ENERGIZE button on the USER toolbar. Rung0000 shouldnow appearasit doesin the programbelow. Oncethereareinstructionsin rung 0000rung 0001will appearbelow it. Click on the 0001to selectthe rung. Click on the XIO andOUTPUT ENERGIZE buttonson the USER toolbar. Rung0001shouldnow appearrlsit doesin Figure 2. *db96ffirdffiH+ D dg at r brr n . f------ n ir r,Dt qqtr il*-l 31e i ;n*!m.m...ll$"**rruru Figure 1: RSLogix Interface ?:@l M .{ V*fJ$ r'cm 46 I cor* crqa:: S P,d*sd edus $ rt,orts t J b corqM $cmc-rqe- El sYso Bl sYsr' t w2- E c,os3R.Em6 fl o-urur D il-WI D s2-stAtus E a3-BWY O r., MR D cs. c@rER D s-cNRa E Nz-N'6EF 8l F "c$FwD O @-ortur O tr.@r - Jcdde.Mde O cwo,erhd -l Cdm6rdcdhddr .J R.cp. Md6 OUTPT]TENERGIZE BUTTON USf,R MEI{U TAB (Selectedby default)
  • 3. Defining Inputs and Outputs (I/O) Using the left mousebutton,doubleclick on the logic symbolsto definethe VO address. When the symbols are selecteda box will appear(refer to Figure 3). Define input addressesfor XIO andXIC symbolsusing"I:0/0" format. Define output energize addressesusingthe "O:0/0" format. The capitalI andO standfor input andouqut, respectively. The first numberbeforethe forward slashis the slot numberandthe numberafter the slashis the point number. Make sureto not to useOs for 0sandvice versa. When all the VO addresseshavebeendefinedusethe VERIFY PROJECTbutton (shown in Figure 3) to check the program for errors. * E& h *rdr @ rool Yhdqi nf D l';E O I lbF n 'h..: 5rrBt QQtrl;;*1, > E!n {Errft<}oo II: D II:r**.- Uit |l*+1, gt $ I teoe{tkd.M.,.llERa"!..sm Figure l: Instruction Addressing '2:@l P : .l 9*fl* r:rrru 47 I ca'o *6." Sh@s'stu S r(erb' lll b c@iFdil !f cr'ggcorsam B sYso, F sYsr. 0 t*t- $ c.osrnoraco O @.wrrut El il -wr D s2. slau O $.EWY D r.. rMR O c5-cNF El m-cdnd O N7-N@F B .E.tr$iwD B @-Nru E n-@r - JCqnmHr@s O do-wH lCdmq#dMdt
  • 4. Should there be a prograrn error, a window will appearat the bofiom of the screen. USethe "*" and"-" symbolsto expandthe errors. The expandedmessagewill statewhat rung and which instruction oontainsthe error (seeFigure 4). Double clicking on the expandedpart of the messagewill selectthe operation that hasthe error. B&2 i RnohrrRRc:hrJdm&d* Figure l: Eror Message If the progfam hasno errors the message"Verif hascompleted,no errors found'will appearabovethe Windows START button in the lower left hand corner of the screen(see Figure 5). tr'igure2: Verilied Frogram 48
  • 5. Downloading Programs The next step is to download the program. To download the program the status menu is used. Atthis stagpin the program the statusmenu will show OFFLINE. To selectthe statusmenu click the arrow next to the menu that shows OFFLINE. Then selectdownload(seeFigure6). 0AEi.'i I rbl|io rr rgie rg t ; ;:ElTTi,-n*&:l-p::]{5slbl i * - *oit*<)o+rd I (ffiRwb $r.,*ro .lllp6rb,s H<morm Glsvso' E sYsr- i w2- E qetuiaro 8@-mr 3 n.wr E 9. srau E B.MY STATUSMENUARROW :',4 6 I .j tlhrererd-Ece..ll*rrqrru-|ru Figure l: Downloading a Program 49
  • 6. Savinga Program In orderto downloada programit mustbe saved. If theprogramis not savedthe window in Figure 7 will openautomatically.Namethe progrcmandsaveit to a 3.5" floppy disk (Drive A). A programcanalsobe savedbeforetrying to downloadby using the FILE drop down menuor the SAVE shortcut,which areidenticalto the onesin Microsoft Word. P& A ssirl5t;i;E;-------l ttlll ttg j5.l 50 I pnOCnr_rt ::E;___ :,* | I nnfvfn | '*'uo lisii&iciiiisT---*-l m I H5 l lEFibt't6 ftFrrthc..cc.,I f S.Edrbr6-ddtu ftrcttufr aucrm: liiiiiiE6- sbr: rd l . q@cTF drB rhqi{TSEPS*C . H.YiinN& v*15'-j Figure l: Savlng a Program Downloading(Continued) After theprogramis savedthefollowing window will popup. Thewindow displaysthe programname,its origin anddestination.SelecttheYES buttonto proceed with the download(seeFigure8). I lrrd DownloadlngProgram (UNTITLED)forBJ.176{ Mkrolajx 1500LSPSeriesC To (UNTITLED)Bul.l76{ Micrologix1500L5PScricsC Driver;AB-DFl-latl,loda:I Areyousr.reyouwantboproceedwtt Download? lY*lNol Figure2: DownloadingProcedure
  • 7. The next window that opensdisplaysthat thePLC is in remoterun mode. This meansthatthe PLC is in run mode. Whena PLC is in run modeit is executingthe currently loadedprogram. In orderto downloada new programto a PLC it must be in programmode. SelectYES to switchthe PLC to programmode(seeFigure 9). SLCi5in rEmobeRLt{ tnOOE. Procassr rnrs! ba swtdpd to ruroba PR0Gilrodr, contiila? f- Y* _l r,r" I Figurel: SwitchingfromRunModetoProgramMode The next window that will openis the downloadstatuswindow. This window displaysthe statusof the download(not pictured). Whenthe downloadis completethe window will automaticallycloseandthe next window will open. This window asksif the PLC shouldchangebackto run mode. SelectYES sothe PLC canswitch to run modeto executethe program(seeFigure 10). e -Effiilffi}li.'.' j A ChmrBo*,boRrnlrlodc? 1i..*.I8"..-il rlp I Figure 2: Switching back to Run Mode Dialogue The final window that popsup asksif the PC shouldgo online. When a PC is online with a PLC it meansthatthe PC is communicatingwith the PLC in realtime. In this modethe operatorat the PC canseethe programthat is beingexecutedandmonitor the statusofthe input andoutputpoints. This is a very usefulfeaturein manufacturing operationsbecauseit allows remotesupervisionandcontrol of the PLC. SeleciYES to go online with the PLC. Figure3: OnlineModeDialogue ! DoyflrHrnttogpftillru?
  • 8. Using the Program At this point the program should be operating. Using the addressedinput buttons on the hainer observethe output lights on the trainer. Sincethe computer is also online the changing inputs and outputs canbe observedfrom the PC monitor. Editing the Program Usethe programstatusmenuto go offline. Click the arrow next to the menuand selectGO OFFLINE. Oncethe PC is offline with the PLC it is possibleto editthe program. Summary This tutorial hasbeendesignedto give a basicintroductionofPLC programming to the new user. There are many additional instructiong shortcutsand featuresin the RSLogix software that are similar to featuresfound in other Windows basedprognms. Many of the additional featurescanbe discoveredthrough additional useof RSLogix. To readmore aboutRSLogix visit: http://www.software.rockwell.com/rslogix/ 52