{"id":6593,"date":"2013-07-08T00:00:05","date_gmt":"2013-07-07T17:00:05","guid":{"rendered":"https:\/\/banbientan.com\/?p=6593"},"modified":"2013-07-08T00:00:05","modified_gmt":"2013-07-07T17:00:05","slug":"plc-la-gi","status":"publish","type":"post","link":"https:\/\/hunglong.banbientan.com\/?p=6593","title":{"rendered":"PLC l\u00e0 g\u00ec?"},"content":{"rendered":"

Xem bi\u1ebfn t\u1ea7n<\/span><\/a> l\u00e0 g\u00ec t\u1ea1i \u0111\u00e2y :\u00a0https:\/\/banbientan.com\/truyen-dong-dien-xoay-chieu\/<\/span><\/a><\/span>
\n<\/a>
\nGi\u1edbi thi\u1ec7u\"\"<\/a><\/span><\/strong><\/strong><\/span>
\nTrong h\u1ecdc ph\u1ea7n n\u00e0y, b\u1ea1n s\u1ebd t\u00ecm hi\u1ec3u l\u00fd do PLC \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0 hi\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong r\u1ea5t nhi\u1ec1u h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng h\u00f3a.<\/span>
\n\u0110\u1ecbnh ngh\u0129a<\/strong><\/span><\/span><\/span><\/span>
\nB<\/strong><\/span>\u1ed9 \u0111i\u1ec1u khi\u1ec3n <\/span><\/span>L<\/strong><\/span>ogic <\/span><\/span>L<\/strong><\/span>\u1eadp tr\u00ecnh ho\u1eb7c<\/span><\/span>PLC<\/strong><\/span>,
\nv\u1eadn h\u00e0nh theo logic trong do ng\u01b0\u1eddi d\u00f9ng l\u1eadp tr\u00ecnh.<\/span><\/span><\/strong><\/span>
\nKh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y t\u00ednh v\u0103n ph\u00f2ng, PLC \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 v\u1eadn h\u00e0nh trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n v\u00e0 v\u1eadn h\u00e0nh thi\u1ebft b\u1ecb v\u00e0 m\u00e1y m\u00f3c c\u1ee7a quy tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/span><\/span>
\n\"bo<\/a>
\n<\/span>\"\"<\/a>
\n<\/span>
\nPh\u00e1t minh<\/strong><\/span>\u00a0 \"\"<\/a><\/span><\/span><\/span>
\nCho \u0111\u1ebfn gi\u1eefa th\u1eadp ni\u00ean 70, h\u1ea7u h\u1ebft m\u00e1y m\u00f3c \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi r\u01a1le n\u1eb1m trong t\u1ee7 b\u1ea3ng \u0111i\u1ec7n l\u1edbn.<\/span>
\nVi\u1ec7c ph\u00e1t minh PLC b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eadn x\u00e9t c\u1ee7a m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t \u00f4 t\u00f4 Hoa K\u1ef3.
\n<\/span>“Ch\u00fang t\u00f4i ph\u1ea3i ch\u1ebf t\u1ea1o l\u1ea1i thi\u1ebft b\u1ecb c\u1ee7a m\u00ecnh m\u1ed7i khi gi\u1edbi thi\u1ec7u m\u1ed9t m\u1eabu xe m\u1edbi. Ch\u00fang t\u00f4i mu\u1ed1n gi\u1ea3m c\u00f4ng vi\u1ec7c n\u00e0y v\u00e0 gi\u1ea3m chi ph\u00ed”
\nCh\u00fang t\u00f4i \u0111\u00e3 t\u1ed1n nhi\u1ec1u c\u00f4ng s\u1ee9c khi n\u1ed1i d\u00e2y cho m\u1ea1ch logic trong pa-nen \u0111i\u1ec1u khi\u1ec3n g\u1ed3m r\u01a1le v\u00e0 b\u1ed9 h\u1eb9n gi\u1edd<\/span>.<\/span>
\nK\u1ebft qu\u1ea3 c\u1ee7a cu\u1ed9c c\u1ea1nh tranh gi\u1eefa c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 d\u1eabn \u0111\u1ebfn vi\u1ec7c ph\u00e1t minh ra PLC \u0111\u1ea7u ti\u00ean v\u00e0o n\u0103m 1969. PLC n\u00e0y cho ph\u00e9p b\u1ea1n d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n ho\u1eb7c thay \u0111\u1ed5i ch\u1ee9c n\u0103ng c\u1ee7a m\u1ea1ch.
\nVai tr\u00f2<\/strong><\/span><\/span><\/span><\/span>
\nPLC ph\u1ea3n \u1ee9ng l\u1ea1i c\u00e1c thay \u0111\u1ed5i v\u1ec1 t\u00edn hi\u1ec7u t\u1eeb nh\u1eefng ngu\u1ed3n nh\u01b0 n\u00fat \u1ea5n, ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh v\u00e0 t\u1ea1o t\u00edn hi\u1ec7u \u0111\u1ea7u ra t\u1edbi t\u1ea3i b\u00ean ngo\u00e0i nh\u01b0 \u0111\u00e8n b\u00e1o.
\nC\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n ho\u1eb7c thay \u0111\u1ed5i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c t\u1ea3i b\u1eb1ng ch\u01b0\u01a1ng tr\u00ecnh ng\u01b0\u1eddi d\u00f9ng.<\/span>
\n<\/object>
\n\u1ee8ng d\u1ee5ng – 1<\/object><\/strong><\/span><\/span><\/span><\/span><\/p>\n

PLC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf r\u1ea5t nhi\u1ec1u \u0111\u1ecba \u0111i\u1ec3m quen thu\u1ed9c.<\/span><\/p>\n

H\u00ecnh \u0111\u1ed9ng n\u00e0y bi\u1ec3u th\u1ecb thang m\u00e1y ch\u1edf \u0111\u1ed3 \u0103n trong m\u1ed9t nh\u00e0 h\u00e0ng. Thang m\u00e1y n\u00e0y ch\u1edf \u0111\u1ed3 \u0103n t\u1eeb t\u1ea7ng m\u1ed9t l\u00ean t\u1ea7ng hai v\u00e0 \u0111\u0129a tr\u1ed1ng t\u1eeb t\u1ea7ng hai xu\u1ed1ng t\u1ea7ng m\u1ed9t.<\/span><\/span><\/p>\n

PLC \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 \u0111\u1ec3 ch\u1edf \u0111\u1ed3 \u0103n v\u00e0 \u0111\u0129a theo \u0111\u1ea7u v\u00e0o t\u1eeb n\u00fat \u1ea5n ho\u1eb7c c\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n ph\u00e1t hi\u1ec7n \u1edf t\u1ea7ng tr\u00ean ho\u1eb7c t\u1ea7ng d\u01b0\u1edbi.<\/span><\/p>\n

1. Khi \u0111\u1ea7u b\u1ebfp \u1ea5n n\u00fat, thang m\u00e1y\u00a0\u00a0 b\u1eaft \u0111\u1ea7u \u0111i l\u00ean t\u1ea7ng tr\u00ean.<\/em><\/span><\/p>\n

2.<\/em><\/span>Sau khi thang m\u00e1y \u0111\u1ebfn t\u1ea7ng tr\u00ean, \u0111\u1ed9ng c\u01a1t\u1ef1 \u0111\u1ed9ng d\u1eebng l\u1ea1i.<\/em><\/span><\/em><\/span><\/p>\n

3. Khi ng\u01b0\u1eddi ph\u1ee5c v\u1ee5 \u1ea5n n\u00fat, thang m\u00e1y b\u1eaft \u0111\u1ea7u \u0111i xu\u1ed1ng t\u1ea7ng d\u01b0\u1edbi.<\/em><\/span> <\/em><\/span><\/p>\n

4. Sau khi thang m\u00e1y \u0111\u1ebfn t\u1ea7ng d\u01b0\u1edbi, \u0111\u1ed9ng c\u01a1\u00a0\u00a0\u00a0 t\u1ef1 \u0111\u1ed9ng d\u1eebng l\u1ea1i.<\/em><\/span>
\nL\u01b0u \u00fd: B\u1ea1n c\u1ea7n s\u1eed d\u1ee5ng kh\u1edfi \u0111\u1ed9ng t\u1eeb \u0111\u1ec3 chuy\u1ec3n m\u1ea1ch t\u1ea3i l\u1edbn, v\u00ed d\u1ee5 nh\u01b0 m\u1ed9t \u0111\u1ed9ng c\u01a1.<\/p>\n

\u1ee8ng d\u1ee5ng<\/strong> – 2<\/strong><\/span><\/span><\/span><\/span><\/p>\n

M\u00e1y m\u00f3c v\u1eadn h\u00e0nh nh\u01b0 th\u1ebf n\u00e0o trong nh\u00e0 m\u00e1y? C\u00e1c ho\u1ea1t \u0111\u1ed9ng n\u00e0y \u0111\u01b0\u1ee3c PLC ki\u1ec3m so\u00e1t.<\/span>
\n\u0110\u1ec3 xem c\u00e1c v\u00ed d\u1ee5, Nh\u1ea5p v\u00e0o<\/strong> t\u00ean quy tr\u00ecnh tr\u00ean h\u00ecnh \u0111\u1ed9ng d\u01b0\u1edbi \u0111\u00e2y.<\/span><\/p>\n

<\/object>
\nL\u1ee3i \u00edch c\u1ee7a PLC -1<\/strong><\/span><\/span><\/span><\/span>
\nT\u1ea1i sao \u001dPLC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf nhi\u1ec1u \u0111\u1ecba \u0111i\u1ec3m nh\u01b0 v\u1eady? PLC c\u00f3 r\u1ea5t nhi\u1ec1u l\u1ee3i \u00edch.<\/span>
\n<\/span>H\u00e3y xem l\u1ea1i c\u00e1c l\u1ee3i \u00edch n\u00e0y.<\/span><\/span>
\nKhi kh\u00f4ng c\u00f3 PLC, ch\u00fang ta c\u1ea7n ph\u1ea3i \u0111i l\u1ea1i d\u00e2y thi\u1ebft b\u1ecb \u0111\u1ec3 thay \u0111\u1ed5i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y.<\/strong>
\n\"\"<\/a>
\n\"\"<\/a><\/span>
\nV\u1edbi PLC, c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng thay \u0111\u1ed5i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ch\u1ec9 b\u1eb1ng ch\u1ec9nh s\u1eeda ch\u01b0\u01a1ng tr\u00ecnh.<\/strong>\"\"<\/a>
\nL\u1ee3i \u00edch c\u1ee7a PLC -2<\/strong><\/span><\/span><\/span><\/span>
\nPLC c\u00f3 r\u1ea5t nhi\u1ec1u l\u1ee3i \u00edch so v\u1edbi m\u1ea1ch logic n\u1ed1i d\u00e2y.
\n<\/span><\/span><\/span><\/span>
\n\u2022 Linh ho\u1ea1t h\u01a1n v\u00e0 \u00edt kh\u1ea3 n\u0103ng g\u00e2y ra l\u1ed7i \u0111i d\u00e2y logic sai<\/span>
\n\u2022 C\u1ea7n \u00edt th\u1eddi gian h\u01a1n \u0111\u1ec3 th\u1ef1c hi\u1ec7n thay \u0111\u1ed5i v\u1ec1 logic<\/span>
\n\u2022 S\u1eed d\u1ee5ng \u00edt kho\u1ea3ng kh\u00f4ng h\u01a1n tr\u00ean m\u1eb7t b\u1eb1ng s\u1ea3n xu\u1ea5t<\/span>
\n\u2022 C\u00f3 nhi\u1ec1u th\u00f4ng tin h\u01a1n gi\u00fap v\u1eadn h\u00e0nh vi\u00ean ch\u1ea9n \u0111o\u00e1n nhanh<\/strong><\/span><\/a>
\n(V\u00ed d\u1ee5: X\u00e1c \u0111\u1ecbnh c\u1ea3nh b\u00e1o l\u1ed7i ho\u1eb7c l\u1ed7i ph\u1ea7n c\u1ee9ng; n\u1ebfu chu k\u1ef3 m\u1ea5t tr\u00ean 5 gi\u00e2y \u0111\u1ec3 ph\u1ea3n \u1ee9ng, th\u00ec h\u00e3y g\u1eedi th\u00f4ng b\u00e1o \u0111\u1ebfn v\u1eadn h\u00e0nh vi\u00ean \u0111\u1ec3 ki\u1ec3m tra xi lanh r\u00f2 r\u1ec9.<\/span>)<\/em>
\n\u2022 Th\u1eddi gian ph\u1ea3n \u1ee9ng nhanh h\u01a1n \u0111\u1ed1i v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea7u v\u00e0o thay \u0111\u1ed5i<\/span>
\nPLC th\u1ebf h\u1ec7 m\u1edbi nh\u1ea5t c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n:
\n<\/span><\/p>\n