Programmable Controllers: Theory and Implementation

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Introduction to PLC Programming and Implementation—from relay logic to PLC logicM1M2OL1OL1OL2OL21M 1M 1M2M 2M 2ML11FUL22FUL33FUH1H2 H3 H4L1L212344FUPB1MasterStartM1 SCR1-1SCR1-2PB5 SetupPB2MasterStopPB6 ResetX1 X2 X3PB3EmergencyStop 1PB4EmergencyStop 2OL1OL1SCR1M1PL1GCR1567CR1-1CR1-2TDR1PS1HydPresTDR1MCR89MCRSS1 EnableOff OnPL2RCR210SS2SEL1SEL2PL3R11CR312PL4R1314151617181920212223242526CR2-1 LS1 LS2 LS3 SOL1CR4-1PB6StartCycleTDR2-1TDR2-2 LS4 LS5 CR3-1SS3Main Back-UpLS6LS7LS4PB7UnloadTDR3-1TDR3-2TDR3-3Figure 45. Electromechanical relay diagram.SOL2PL5GM2PL6GSOL3CR4TDR2TDR3PL7GSOL4PL8GIndustrial Text & Video Company www.industrialtext.com 1-800-752-839848
Introduction to PLC Programming and Implementation—from relay logic to PLC logicH1H2 H3 H4L1L24FUPB1MasterStartPB2MasterStopX1 X2 X3PB3EmergencyStop 1PB4EmergencyStop 2PLC FaultContact 1OL1OL1SCR1M1M1 SCR1-2PLC FaultContact 2PLC Fail AlarmPL1GSCR1-1PLCFigure 46. Elements of the moderization example system to be left hardwired.I/O AddressModuleTypeRackGroupTerminalDescriptionInput0 0 0 PB5—Setup PB0 0 1 PB6—Reset (wired NC)0 0 2 PS1—Hydraulic pressure switch0 0 3 SS1—Enable selector switch (NCcontact left unconnected)Input0 0 4 SEL1—Select 1 position0 0 5 SEL2—Select 2 position0 0 6 LS1—Limit switch up (position 1)0 0 7 LS2—Limit switch up (position 2)Input0 1 0 LS3—Location set0 1 1 PB6—Start load cycle0 1 2 LS4—Trap (wired NC)0 1 3 LS5—Position switchInput0 1 4 PB7—Unload PB0 1 5 SS3—Main/backup (wired NO)0 1 6 LS6—Maximum length detect0 1 7 LS7—Minimum length backupOutput0 3 0 PL2—Setup OK0 3 1 PL3—Select 10 3 2 PL4—Select 20 3 3 SOL1—Advance forwardOutput0 3 4 SOL2—Engage0 3 5 PL5—Engage ON0 3 6 M2—Run motor0 3 7 PL6—Motor run ONOutput0 4 0 SOL3—Fast stop0 4 1 PL7—Fast stop ON0 4 2 SOL4—Unload with backup0 4 3 PL8—Backup ONTable 20. I/O address assignment.Industrial Text & Video Company www.industrialtext.com 1-800-752-839849
Page 2 and 3: A Special Note ToOur CustomersHere
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Programmable Controllers: Theory and Implementation

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