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1、,Introduction to the LFE LCO (PM),Topic Overview,1.Logical Function Unit (LFE) Definition2.Embedding and Delimiting3.Functionality OverviewOverview DiagramsFurther information,1. Logical Function Unit (LFE) Definition,The LFE LCO processes functions to coordinate the drive regulators, technological
2、control loops and mechanical travel at the strip, dependent upon the current mill occupation and operating mode. Significance:LFE = Logical Function Unit (original German language term: Unit = Einheit)LCO = Line COordinator,2. Embedding and Delimiting,3. Functionality Overview,Plate MillSequencesMan
3、ual/Automatic modePlant modesSpecial modesStop the plantControlling the strip drivesPlant diagnosticsSimulation,3. Functionality Overview,Plate MillSequencesControl and monitor all aggregates in the immediate stand area by a sequence for each plant areaNormally 3 sequences for one stand mill- entry
4、area (take over strip from furnace, descaling)- rolling area (rolling all passes)- exit area (hand over strip to next automation area, e.g. ACC)Manual/Automatic modePlant modesSpecial modesStop the plantControlling the strip drivesPlant diagnosticsSimulation,3. Functionality Overview,Plate MillSeque
5、ncesAutomatic/Manual mode- Automatic operation of the Plate mill using process computers C mode- Jog the drives for maintenance, repair and set-up work in manual mode (controlled by LFE-MRG)Plant modesSpecial modesStop the plantControlling the strip drivesPlant diagnosticsSimulation,3. Functionality
6、 Overview,Plate MillSequencesManual/Automatic modePlant modes and functions- Implement the entry and exit transport, descaling, oscillating, rolling, creep speed and upstream/downstream synchronization functions - Automatic switch-over to next area, dependent upon sequencing and strip start and end
7、positions - Evaluate Ready for Operation of each function and plant areaSpecial modesStop the plantControlling the strip drivesPlant diagnosticsSimulation,3. Functionality Overview,Plate MillSequencesManual/Automatic modePlant modesSpecial modesStop the plant (supervision mill)- Monitor the plant fo
8、r electrical, mechanical and hydraulic faults- Stop (Emergency/Quick Stop) affected drives, when faults are detected, via a ramp or drive emergency stop by the hardware - Stop actual rolling sequence after the pass (signal Finish Pass“)- Stop strip extraction from furnace (signal Finish Plate“)- Out
9、put diagnostics messages and display on message systemControlling the strip drivesPlant diagnosticsSimulation,3. Functionality Overview,Plate MillSequencesManual/Automatic modePlant modesSpecial modesStop the plantControlling the drives- Setpoint preselect and calculation for individual roller table
10、 groups and stands in automatic sequence (not in manual mode)- Coordinate drives, including setpoint calculation- Supervision all drive controls and positioning devicesPlant diagnosticsSimulation,3. Functionality Overview,Plate MillSequencesManual/Automatic modePlant modesSpecial modesStop the plant
11、Controlling the strip drivesPlant diagnosticsOutput diagnostics messages/requests (dialog/error diagnostics) for operating a plantSimulation,3. Functionality Overview,Plate MillSequencesManual/Automatic modePlant modesSpecial modesStop the plantControlling the strip drivesPlant diagnosticsSimulation
12、- Simulate non-existent or non-functional neighboring LFEsin automation part simulation- Simulate plant functions using a fictitious plate inplant part simulation or during ghost rolling- Diagnose operational readiness using SIL,4. Overview Diagrams,Plate Mill with 3 Logical Areas,4. Overview Diagrams,HMI Plant Overview of the Plate Mill,5. Further information,Functional Design Specification Engineering Guide Operating Manual Commissioning Manual SiRoll Guideline,Introduction to the LFE LCO (PM),
