{"id":2745,"date":"2015-07-25T03:26:03","date_gmt":"2015-07-25T03:26:03","guid":{"rendered":"http:\/\/codienlanh.com\/?p=2745"},"modified":"2015-07-25T03:38:39","modified_gmt":"2015-07-25T03:38:39","slug":"nha-thau-me-dinh-nghia-plc-la-gi-va-duoc-su-dung-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/codienlanh.com\/en\/nha-thau-me-dinh-nghia-plc-la-gi-va-duoc-su-dung-nhu-the-nao\/","title":{"rendered":"Nh\u00e0 th\u1ea7u M&#038;E \u0111\u1ecbnh ngh\u0129 PLC l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"<ul>\n<li>\u0110\u1ecbnh ngh\u0129a PLC<\/li>\n<\/ul>\n<p>Theo c\u00e1c <strong><a href=\"http:\/\/codienlanh.com\/\">nh\u00e0 th\u1ea7u m&amp;e<\/a><\/strong>, PLC vi\u1ebft t\u1eaft c\u1ee7a Programmable Logic Controller, l\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c (kh\u1ea3 tr\u00ecnh) cho ph\u00e9p th\u1ef1c hi\u1ec7n linh ho\u1ea1t c\u00e1c gi\u1ea3i ph\u00e1p \u0111i\u1ec1u khi\u1ec3n logic th\u00f4ng qua m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh. Ng\u01b0\u1eddi s\u1eed d\u1ee5ng c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t lo\u1ea1t tr\u00ecnh t\u1ef1 c\u00e1c s\u1ef1 ki\u1ec7n. C\u00e1c s\u1ef1 ki\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1edfi t\u00e1c nh\u00e2n k\u00edch th\u00edch (ng\u00f5 v\u00e0o) t\u00e1c \u0111\u1ed9ng v\u00e0o PLC ho\u1eb7c qua c\u00e1c ho\u1ea1t \u0111\u1ed9ng c\u00f3 tr\u1ec5 nh\u01b0 th\u1eddi gian \u0111\u1ecbnh th\u00ec hay c\u00e1c s\u1ef1 ki\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1ebfm.<\/p>\n<p>M\u1ed9t khi s\u1ef1 ki\u1ec7n \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t th\u1eadt s\u1ef1, n\u00f3 b\u1eadt ON hay OFF thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n b\u00ean ngo\u00e0i \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 thi\u1ebft b\u1ecb v\u1eadt l\u00fd. M\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n l\u1eadp tr\u00ecnh s\u1ebd li\u00ean t\u1ee5c \u201cl\u1eb7p\u201d trong ch\u01b0\u01a1ng tr\u00ecnh do \u201cng\u01b0\u1eddi s\u1eed d\u1ee5ng l\u1eadp ra\u201d ch\u1edd t\u00edn hi\u1ec7u \u1edf ng\u00f5 v\u00e0o v\u00e0 xu\u1ea5t t\u00edn hi\u1ec7u \u1edf ng\u00f5 ra t\u1ea1i c\u00e1c th\u1eddi \u0111i\u1ec3m \u0111\u00e3 l\u1eadp tr\u00ecnh.<\/p>\n<p><strong>Nh\u00e0 th\u1ea7u m&amp;e<\/strong> cho bi\u1ebft, \u0111\u1ec3 kh\u1eafc ph\u1ee5c nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n d\u00f9ng d\u00e2y n\u1ed1i (b\u1ed9 \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng r\u1edd-le, relay), ng\u01b0\u1eddi ta \u0111\u00e3 ch\u1ebf t\u1ea1o ra b\u1ed9 PLC nh\u1eb1m th\u1ecfa m\u00e3n c\u00e1c y\u00eau c\u1ea7u sau :<\/p>\n<p>+ L\u1eadp tr\u00ecnh d\u1ec3 d\u00e0ng , ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh d\u1ec3 h\u1ecdc .<\/p>\n<p>+ G\u1ecdn nh\u1eb9, d\u1ec3 d\u00e0ng b\u1ea3o qu\u1ea3n , s\u1eeda ch\u1eefa.<\/p>\n<p>+ Dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb l\u1edbn \u0111\u1ec3 c\u00f3 th\u1ec3 ch\u1ee9a \u0111\u01b0\u1ee3c nh\u1eefng ch\u01b0\u01a1ng tr\u00ecnh ph\u1ee9c t\u1ea1p .<\/p>\n<p>+ Ho\u00e0n to\u00e0n tin c\u1eady trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p .<\/p>\n<p>+ Giao ti\u1ebfp \u0111\u01b0\u1ee3c v\u1edbi c\u00e1c thi\u1ebft b\u1ecb th\u00f4ng minh kh\u00e1c nh\u01b0 : m\u00e1y t\u00ednh , n\u1ed1i m\u1ea1ng , c\u00e1c m\u00f4i Modul m\u1edf r\u1ed9ng.<\/p>\n<p>+ Gi\u00e1 c\u1ea3 c\u00e1 th\u1ec3 c\u1ea1nh tranh \u0111\u01b0\u1ee3c.<\/p>\n<p><a href=\"http:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-2746\" src=\"http:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-2.jpg\" alt=\"Nh\u00e0 th\u1ea7u M&amp;E \u0111\u1ecbnh ngh\u0129 PLC l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o?\" width=\"600\" height=\"450\" srcset=\"https:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-2.jpg 423w, https:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-2-300x225.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>C\u00e1c thi\u1ebft k\u1ebf \u0111\u1ea7u ti\u00ean l\u00e0 nh\u1eb1m thay th\u1ebf cho c\u00e1c ph\u1ea7n c\u1ee9ng r\u1edd-le d\u00e2y n\u1ed1i. Tuy nhi\u00ean, b\u00ean c\u1ea1nh \u0111\u00f3 vi\u1ec7c \u0111\u00f2i h\u1ecfi t\u0103ng c\u01b0\u1eddng dung l\u01b0\u1ee3ng nh\u1edb v\u00e0 t\u00ednh d\u1ec5 d\u00e0ng cho PLC m\u00e0 v\u1eabn b\u1ea3o \u0111\u1ea3m t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd c\u0169ng nh\u01b0 gi\u00e1 c\u1ea3 \u2026 \u0111\u00e3 g\u00e2y ra s\u1ef1 quan t\u00e2m s\u00e2u s\u1eafc \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng PLC trong c\u00f4ng nghi\u1ec7p. C\u00e1c t\u1eadp l\u1ec7nh nhanh ch\u00f3ng \u0111i t\u1eeb c\u00e1c l\u1ec7nh logic \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn c\u00e1c l\u1ec7nh \u0111\u1ebfm, \u0111\u1ecbnh th\u1eddi, thanh ghi d\u1ecbch \u2026 sau \u0111\u00f3 l\u00e0 c\u00e1c ch\u1ee9c n\u0103ng l\u00e0m to\u00e1n tr\u00ean c\u00e1c m\u00e1y l\u1edbn \u2026 S\u1ef1 ph\u00e1t tri\u1ec3n c\u00e1c m\u00e1y t\u00ednh d\u1eabn \u0111\u1ebfn c\u00e1c b\u1ed9 PLC c\u00f3 dung l\u01b0\u1ee3ng l\u1edbn, s\u1ed1 l\u01b0\u1ee3ng I\/O nhi\u1ec1u h\u01a1n.<\/p>\n<p><strong>Nh\u00e0 th\u1ea7u m&amp;e<\/strong> c\u00f2n cho bi\u1ebft th\u00eam, trong PLC, ph\u1ea7n c\u1ee9ng CPU v\u00e0 ch\u01b0\u01a1ng tr\u00ecnh l\u00e0 \u0111\u01a1n v\u1ecb c\u01a1 b\u1ea3n cho qu\u00e1 tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c x\u1eed l\u00fd h\u1ec7 th\u1ed1ng. Ch\u1ee9c n\u0103ng m\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u1ea7n th\u1ef1c hi\u1ec7n s\u1ebd \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh. Ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c n\u1ea1p s\u1eb5n v\u00e0o b\u1ed9 nh\u1edb c\u1ee7a PLC, PLC s\u1ebd th\u1ef1c hi\u1ec7n vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n d\u1ef1a v\u00e0o ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y. Nh\u01b0 v\u1eady n\u1ebfu mu\u1ed1n thay \u0111\u1ed5i hay m\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng c\u1ee7a quy tr\u00ecnh c\u00f4ng ngh\u1ec7, ta ch\u1ec9 c\u1ea7n thay \u0111\u1ed5i ch\u01b0\u01a1ng tr\u00ecnh b\u00ean trong b\u1ed9 nh\u1edb c\u1ee7a PLC. Vi\u1ec7c thay \u0111\u1ed5i hay m\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng m\u00e0 kh\u00f4ng c\u1ea7n m\u1ed9t s\u1ef1 can thi\u1ec7p v\u1eadt l\u00fd n\u00e0o so v\u1edbi c\u00e1c b\u1ed9 d\u00e2y n\u1ed1i hay r\u1edd-le.<\/p>\n<p><a href=\"http:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2747\" src=\"http:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-1.jpg\" alt=\"Nh\u00e0 th\u1ea7u M&amp;E \u0111\u1ecbnh ngh\u0129 PLC l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o?\" width=\"640\" height=\"480\" srcset=\"https:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-1.jpg 640w, https:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-1-300x225.jpg 300w, https:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-1-624x468.jpg 624w, https:\/\/codienlanh.com\/wp-content\/uploads\/2015\/07\/nha-thau-me-1-600x450.jpg 600w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<ul>\n<li>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a m\u1ed9t PLC.<\/li>\n<\/ul>\n<p>T\u1ea5t c\u1ea3 c\u00e1c PLC \u0111\u1ec1u c\u00f3 th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0: m\u1ed9t b\u1ed9 nh\u1edb ch\u01b0\u01a1ng tr\u00ecnh RAM b\u00ean trong (c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng th\u00eam m\u1ed9t s\u1ed1 b\u1ed9 nh\u1edb ngo\u00e0i EPROM ), m\u1ed9t b\u1ed9 vi x\u1eed l\u00fd c\u00f3 c\u1ed5ng giao ti\u1ebfp d\u00f9ng cho vi\u1ec7c gh\u00e9p n\u1ed1i v\u1edbi PLC v\u00e0 c\u00e1c modem v\u00e0o\/ra.<\/p>\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, m\u1ed9t b\u1ed9 PLC ho\u00e0n ch\u1ec9nh c\u00f2n \u0111i k\u00e8m th\u00eam m\u1ed9t \u0111\u01a1n v\u1ecb l\u1eadp tr\u00ecnh b\u1eb1ng tay hay b\u1eb1ng m\u00e1y t\u00ednh. H\u1ea7u h\u1ebft c\u00e1c \u0111\u01a1n v\u1ecb l\u1eadp tr\u00ecnh \u0111\u01a1n gi\u1ea3n \u0111\u1ec1u c\u00f3 \u0111\u1ee7 RAM \u0111\u1ec3 ch\u1ee9a \u0111\u1ef1ng ch\u01b0\u01a1ng tr\u00ecnh d\u01b0\u1edbi d\u1ea1ng ho\u00e0n thi\u1ec7n hay b\u1ed5 sung. N\u1ebfu \u0111\u01a1n v\u1ecb l\u1eadp tr\u00ecnh l\u00e0 \u0111\u01a1n v\u1ecb x\u00e1ch tay, RAM th\u01b0\u1eddng l\u00e0 lo\u1ea1i CMOS c\u00f3 pin d\u1ef1 ph\u00f2ng, ch\u1ec9 khi n\u00e0o ch\u01b0\u01a1ng tr\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u00e0 s\u1eb3n s\u00e0ng s\u1eed d\u1ee5ng th\u00ec n\u00f3 m\u1edbi truy\u1ec1n sang b\u1ed9 nh\u1edb PLC. \u0110\u1ed1i v\u1edbi c\u00e1c PLC l\u1edbn th\u01b0\u1eddng l\u1eadp tr\u00ecnh tr\u00ean m\u00e1y t\u00ednh nh\u1eb1m h\u1ed5 tr\u1ee3 cho vi\u1ec7c vi\u1ebft, \u0111\u1ecdc v\u00e0 ki\u1ec3m tra ch\u01b0\u01a1ng tr\u00ecnh. C\u00e1c \u0111\u01a1n v\u1ecb l\u1eadp tr\u00ecnh n\u1ed1i v\u1edbi PLC qua c\u1ed5ng RS232, RS422, RS458, \u2026<\/p>\n<ul>\n<li>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a PLC<\/li>\n<\/ul>\n<p>CPU \u0111i\u1ec1u khi\u1ec3n c\u00e1c ho\u1ea1t \u0111\u1ed9ng b\u00ean trong PLC. B\u1ed9 x\u1eed l\u00fd s\u1ebd \u0111\u1ecdc v\u00e0 ki\u1ec3m tra ch\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1ee3c ch\u1ee9a trong b\u1ed9 nh\u1edb, sau \u0111\u00f3 s\u1ebd th\u1ef1c hi\u1ec7n th\u1ee9 t\u1ef1 t\u1eebng l\u1ec7nh trong ch\u01b0\u01a1ng tr\u00ecnh , s\u1ebd \u0111\u00f3ng hay ng\u1eaft c\u00e1c \u0111\u1ea7u ra. C\u00e1c tr\u1ea1ng th\u00e1i ng\u00f5 ra \u1ea5y \u0111\u01b0\u1ee3c ph\u00e1t t\u1edbi c\u00e1c thi\u1ebft b\u1ecb li\u00ean k\u1ebft \u0111\u1ec3 th\u1ef1c thi. V\u00e0 to\u00e0n b\u1ed9 c\u00e1c ho\u1ea1t \u0111\u1ed9ng th\u1ef1c thi \u0111\u00f3 \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o ch\u01b0\u01a1ng tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c gi\u1eef trong b\u1ed9 nh\u1edb.<\/p>\n<p>C\u00e1c d\u00f2ng PLC th\u00f4ng d\u1ee5ng \u1edf Vi\u1ec7t Nam: OMRON (Nh\u1eadt B\u1ea3n), Siemens (CHLB \u0110\u1ee9c), Delta (\u0110\u00e0i Loan), Mitsubishi (Nh\u1eadt B\u1ea3n), Keyence (Nh\u1eadt B\u1ea3n)\u2026<\/p>\n<p>Xem th\u00eam: <a href=\"http:\/\/codienlanh.com\/thi-cong-he-thong-dien-lap-dat-luoi-dien-ha-the\/\">Thi c\u00f4ng h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, l\u1eafp \u0111\u1eb7t l\u01b0\u1edbi \u0111i\u1ec7n h\u1ea1 th\u1ebf<\/a><\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <a href=\"http:\/\/codienlanh.com\/lap-dat-tram-hop-bo-trong-he-thong-co-dien\/\">L\u1eafp \u0111\u1eb7t tr\u1ea1m h\u1ee3p b\u1ed9 trong h\u1ec7 th\u1ed1ng c\u01a1 \u0111i\u1ec7n<\/a><\/p>\n<p>\u00a0<\/p>\n<p>H\u00e3y li\u00ean h\u1ec7 v\u1edbi YOCO M&amp;E qua th\u00f4ng tin:<\/p>\n<h4><strong>C\u00d4NG TY C\u01a0 \u0110I\u1ec6N L\u1ea0NH TU\u1ed4I TR\u1eba (YOCO M&amp;E)<\/strong><\/h4>\n<p>Website: www.codienlanh.com<\/p>\n<p>E-Mail: info@yoco.vn<\/p>\n<p>\u0110i\u1ec7n tho\u1ea1i: 08 3894 1921 \u2013 (Hotline: 0909 169 059 \u2013 Mr.Trung)<\/p>\n<p>\u0110\u1ecba ch\u1ec9: 636 Phan V\u0103n Tr\u1ecb, P.10, Q.G\u00f2 V\u1ea5p \u2013 Tp. H\u1ed3 Ch\u00ed Minh<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ecbnh ngh\u0129a PLC Theo c\u00e1c nh\u00e0 th\u1ea7u m&amp;e, PLC vi\u1ebft t\u1eaft c\u1ee7a Programmable Logic Controller, l\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c (kh\u1ea3 tr\u00ecnh) cho ph\u00e9p th\u1ef1c hi\u1ec7n linh ho\u1ea1t c\u00e1c gi\u1ea3i ph\u00e1p \u0111i\u1ec1u khi\u1ec3n logic th\u00f4ng qua m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh. Ng\u01b0\u1eddi s\u1eed d\u1ee5ng c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t<\/p>\n","protected":false},"author":1,"featured_media":2748,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,20,21],"tags":[613],"class_list":["post-2745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-ky-thuat","category-tin-tuc","tag-nha-thau-me"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Nh\u00e0 th\u1ea7u M&amp;E \u0111\u1ecbnh ngh\u0129a PLC l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o?Nh\u00e0 th\u1ea7u M&amp;E \u0111\u1ecbnh ngh\u0129 PLC l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o? - C\u00f4ng ty C\u01a1 \u0110i\u1ec7n L\u1ea1nh Tu\u1ed5i Tr\u1ebb (YOCO M&amp;E)<\/title>\n<meta name=\"description\" content=\"Nh\u00e0 th\u1ea7u m&amp;e cho bi\u1ebft, trong PLC, ph\u1ea7n c\u1ee9ng CPU v\u00e0 ch\u01b0\u01a1ng tr\u00ecnh l\u00e0 \u0111\u01a1n v\u1ecb c\u01a1 b\u1ea3n cho qu\u00e1 tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c x\u1eed l\u00fd h\u1ec7 th\u1ed1ng ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/codienlanh.com\/nha-thau-me-dinh-nghia-plc-la-gi-va-duoc-su-dung-nhu-the-nao\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nh\u00e0 th\u1ea7u M&amp;E \u0111\u1ecbnh ngh\u0129a PLC l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o?Nh\u00e0 th\u1ea7u M&amp;E \u0111\u1ecbnh ngh\u0129 PLC l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o? 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