Sesi_3_Peta Memori & Pengalamatan
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PROGRAMMABLE
LOGIC CONTROLLERPertemuan III:
Peta Memori & Pengalamatan
Oleh :
Akhmad Musafa, ST. MT.
Program Studi Teknik Elektro
Fakultas Teknik - Universitas Budi Luhur
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Peta Memori PLC OMRON
CPM1A
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Peta Memori PLC OMRON
CPM1A (con’t)
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MEMORI PLC
� IR (INTERNAL RELAY)
� SR (SPECIAL RELAY)
� AR (AUXILARY RELAY)
� HR (HOLDING RELAY)
� LR (LINK RELAY)
� TR (TEMPORARY RELAY)
� TC (TIMER/COUNTER)
� DM (DATA MEMORY)
� UM (UPPER MEMORY)
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IR (INTERNAL RELAY)
� Fungsi :
� IR Input, IR Output (Berhubungan dengan terminal input danoutput)
� IR Work Area (Pengolahan logika program)
� SYSMAC BUS AREA � Komunikasi data PLC denganunit I/O (RS485/200 meter)
� Special I/O unit area � untuk special I/O (Analog input/output)
� Optical I/O area � pengolahan dan menyimpan data dari Optical I/O unit PLC
� Group 2 High Density I/O unit area � Menyimpan danmengolah data dari High Density I/O unit group 2
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SR (SPECIAL RELAY)� Jumlah bit � 192
� Relay dengan fungsi khusus :� Flags, misal pada instruksi penjumlahan terhadap kelebihan
digit pada hasilnya (Carry Flag)
� Kontrol bit PLC
� Informasi kondisi PLC
� Sistem clock (pulsa 1 detik, 0.2 detik, dll)
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AR (AUXILARY RELAY)
� Jumlah � 448 bit (AR00 – AR27)
� Terdiri dari flag dan bit dengan tujuan-tujuan khusus
� Menunjukkan kondisi PLC yang disebabkan olehkegagalan sumber tegangan,Kondisi Special I/O, KondisiI/O unit, Kondisi CPU unit, Kondisi Memory PLC, Dll
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HR (HOLDING RELAY)
� Jumlah � 1600 bit (HR00 – HR99)
� Menyimpan data (bit-bit penting) � tidak hilangwalaupun sumber tegangan PLC hilang (off)
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LR (LINK RELAY)
� Jumlah � 1024 bit (LR00 – LR63)
� Digunakan untuk data link pada PLC link sistem
� Fungsi : tukar menukar informasi antar dua PLC atau lebih
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TR (TEMPORARY RELAY)
� Register 8 bit (TR0 – TR7)
� Untuk menyimpan sementara kondisi logika
program (ON-OFF) pada ladder diagram yang
mempunyai titik pencabangan khusus
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TC (TIMER/COUNTER)
� Jumlah � 512 bit
� Digunakan sebagai Timer atau Counter, kecuali
TC00 – TC02 digunakan sebagai Interval Timer
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DM (DATA MEMORY)
� Menyimpan data-data program & parameter pengoperasian PLC (tidak terpengaruh saat power off)
� DM Read/Write � manipulasi data program, dapatdihapus/ditulis
� DM Special I/O Unit � Menyimpan & mengolah data hasil dari special I/O unit, mendefinisikan sistem kerjaspecial I/O unit
� DM History Log � Menyimpan informasi penting saatPLC mengalami kegagalan sistem
� DM Link Test Area � Menyimpan informasi status sistem link PLC
� DM Setup � Setup kondisi default PLC
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UM (UPPER PROGRAM)
� USER PROGRAM AREA
� Menyimpan & menjalankan program user
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Sekian & Terima kasih…!