5 Plc Counter 2
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Transcript of 5 Plc Counter 2
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Counter : teori dan aplikasiplus : kombinasi timer dan counter
Handy WicaksonoJurusan Teknik ElektroUniversitas Kristen Petra
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Overview Materi
Prinsip kerja counterMacam – macam counterAplikasi Counter pada sistem
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Counter
Fungsi counter :Menghitung banyaknya/jumlah kejadian tertentu.
Misal : menghitung jumlah barang untukpensortiran, pengepakan, dllMempunyai 2 input :
Pulse Input harus berbentuk pulsaReset Input
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Cara kerja Counter
Counter coil akan aktif dan menghitung jika input pulsa berubah dari 0 ke 1 (rising edge)Counter coil akan mati dan nilai kembali ke 0 jikainput reset diaktifkanBesar nilai yang akan dihitung Counter ditunjukkanpreset valueKetika nilai Counter mencapai preset value, counter contact akan aktif.
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Jenis Counter
Tipe counter :Count up hitungan naikCount down hitungan turunCount up – down hitungan naik - turun
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Counter – count up
I1
I2
C1
O1
1 2 3 4 0
Ladder diagram
Timing diagram
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Counter – count down
I2
C1
O1
2 1 0 9999 3
Ladder diagram
Timing diagram
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Latihan Counter 1Mesin penghitung dan pengepak barang
B O X
Limit switch
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Cara kerja
Tombol Start ON. Conveyor ONSensor mendeteksi dan menghitung barangdi konveyor.Jika 5 barang sudah terdeteksi, solenoid akan ON, conveyor OFFSolenoid akan menyentuh Limit Switch, sehingga solenoid akan OFF, conveyor ONSensor kembali melakukan perhitungan.
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Latihan Counter 2 –Tempat parkir mobil
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Cara kerja sistem
Sensor 1 menghitung jumlah mobil yang masuk.Jika jumlah = 5, maka lampu Full akanmenyala, dan mobil tidak boleh masuk lagiJika ada mobil yang keluar, akan dihitungoleh sensor 2, maka lampu Full mati, danmobil boleh masuk lagi.
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Latihan Counter 3 (Tugas)
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Cara kerja
Kondisi awal, box kosong siap terima.Start ON, conv apel ON, sensor apelmendeteksi jumlah apel sampai 5.Conv apel OFF, conv box ON sampai sensor box ON.Siklus di atas kembali berulang.
Catatan : perhatikan status sensor box yang selalu ON saat box ada di depannya
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Latihan counter 4
Bagaimana melakukan penghitungansebanyak 20.000 kali?
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Kombinasi Timer dan Counter
Kombinasi timer dan counter…
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Latihan Timer – Counter 1
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Cara kerja
Jika sensor mendeteksi benda sebanyak 5 kali,Conveyor OFFSolenoid ON selama 3 detikSetelah itu Conveyor ON lagi dan siklusberulang
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Tugas Timer – Counter 2
ON selama 3 detik
Berkedip 3 x
ON selama 5 detik
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Tugas Timer – Counter 3 & 4
Mesin cuci dengan koin1 koin nyala 3 detik2 koin nyala 6 detik3 koin nyala 9 detik
Bagaimana membuat timer menghitungselama 24 jam?
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Demo instruksi dasar (1)
Plant :Boleh mengambil dari sistem yang sudah ada
Contoh : Tempat cuci mobil otomatisBoleh mengembangkan sistem lama menjadisistem yang sudah ada
Contoh : Merancang palang pintu KA otomatisSistem harus nyata, dilengkapi dengan foto –foto.
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Demo instruksi dasar (2)
Program minimal memiliki :5 input (termasuk Stop dan Start PB)3 output3 Timer1 Counter
Minimal = boleh tapi nilai minimal lulus..
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Demo instruksi dasar (3)
Format laporan1. Bagaimana bisa mendapat ide?2. Gambar atau sketsa sistem3. Cara kerja/deskripsi sistem4. Flow Chart sistem5. Input-Output List6. Ladder Diagram (semua alamat Input/Output
harus diberi symbol / comment)
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Demo instruksi dasar (4)
Kriteria penilaian :Keunikan Ide! : 30 %Tingkat kesulitan dan efisiensi program
: 50 %Tidak selalu sama dengan panjang programTidak selalu sama dengan banyaknya Input/Output yang digunakan
Laporan : 20 %
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Advance Instruction