{"id":2446,"count":96,"description":"

[title style=\"bold-center\" text=\"B\u1ed8 L\u1eacP TR\u00ccNH s7-400\" margin_top=\"10px\" size=\"150\"]<\/h2>\r\n[block id=\"bo-lap-trinh-s7-400\"]\r\n

T\u00d4\u0309NG QUAN V\u00ca\u0300 PLC S7-400<\/strong><\/h1>\r\n

1. T\u1ed4NG QU\u00c1T CHUNG V\u1ec0 B\u1ed8 \u0110I\u1ec0U KHI\u1ec2N PLC S7-400:<\/strong><\/h2>\r\nPLC S7-400<\/strong> l\u00e0 m\u1ed9t s\u1ea3n ph\u1ea9m PLC m\u1ea1nh, t\u1ed1 cao \u0111\u1ed9 x\u1ee9 l\u00fd cao, qu\u1ea3n l\u00fd b\u1ed9 nh\u1edb t\u1ed1t, k\u1ebft n\u1ed1i m\u1ea1ng c\u00f4ng nghi\u1ec7p. v\u1ec1 t\u00ednh n\u0103ng S7-400 c\u00f3 nhi\u1ec1u t\u00ednh n\u0103ng so v\u1edbi S7-300. \u0110\u1eb7c bi\u1ec7t v\u1ec1 t\u00ednh n\u0103ng truy\u1ec1n th\u00f4ng .\r\n\r\nT\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd<\/strong>: T\u1ed1c \u0111\u1ed9 nhanh, t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd l\u1ec7nh nhanh l\u00ean t\u1edbi 0.1 t\u1edbi 0.2\u00b5s, chu k\u1ef3 v\u00f2ng qu\u00e9t nh\u1ecf. T\u1eadp l\u00eanh m\u1ea1nh v\u00e0 ho\u00e0n ch\u1ec9nh \u0111\u00e1p \u1ee9ng c\u00e1c nhi\u1ec7m v\u1ee5 ph\u1ee9c t\u1ea1p . C\u00f3 th\u1ebb nh\u1edb (MMC- flash Eproom) \u0111\u1ebf m\u1edf r\u1ed9ng b\u1ed9 nh\u1edb ho\u1eb7c backup d\u1eef li\u1ec7u.\r\n\r\nTruy\u1ec1n th\u00f4ng<\/strong>: s\u1eed d\u1ee5ng c\u00e1c m\u1ea1ng truy\u1ec1n th\u00f4ng nh\u01b0 sau INDUSTRIAL ERTHERNET cho c\u1ea5p gi\u00e1m s\u00e1t, PROFIBUS cho c\u1ea5p tr\u01b0\u1eddng, AS-I c\u1ea3m bi\u1ebfn thi\u1ebft b\u1ecb ch\u1ea5p h\u00e0nh , MPI n\u1ed1i gi\u0169a c\u00e1c thi\u1ebft b\u1ecb CPU, PG\/PC, TD\/TO .S\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i hinh m\u1ea1ng \u0111i\u1ec3m-\u0111i\u1ec3m ho\u1eb7c bus truy\u1ec1n th\u00f4ng qua giao di\u1ec7n t\u00edch h\u1ee3p tr\u00ean bus tr\u01b0\u1eddng s\u1eed d\u1ee5ng CPU ho\u1eb7c IM ( modul giao di\u1ec7n ho\u1eb7c FM, CP )\r\n\r\nGiao di\u1ec7n MPI<\/strong>: MPI l\u00e0 giao di\u1ec7n \u0111\u1ec3 t\u00edch h\u1ee3p c\u00e1c h\u1ec7 th\u1ed1ng PG\/PC, HMI v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng SIMATIC S7\/C7\/WinAC, c\u00f3 th\u1ec3 n\u1ed1i t\u1ed1i \u0111a t\u1edbi 125 \u0111i\u1ec3m MPI v\u1edbi t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1edbi 187.5Kbit\/s.Th\u00f4ng qua MPI m\u00e0 ta c\u00f3 th\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u gi\u1eefa c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n v\u1edbi nhau, c\u00f3 ngh\u0129a l\u00e0 1 CPU c\u00f3 th\u1ec3 truy c\u1eadp t\u1edbi nhi\u1ec1u c\u00e1c \u0111\u1ea7u v\u00e0o ra kh\u00e1c nhau c\u1ee7a c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n kh\u00e1c.\r\n\r\nGiao di\u1ec7n PROFIBUS \u2013 DP<\/strong>: S7-400 c\u00f3 th\u1ec3 n\u1ed1i v\u00e0o bus tr\u01b0\u1eddng PROFIBUS c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u1ea1o ra ch\u01b0\u01a1ng tr\u00ecnh ph\u00e2n t\u00e1n gi\u00fap truy\u1ec1n th\u00f4ng v\u1edbi c\u00e1c thi\u1ebft b\u1ecb tr\u01b0\u1eddng. C\u00e1c modul vao ra ph\u00e2n t\u00e1n \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1eb1ng STEP7 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c modul v\u00e0o ra t\u1eadp chung, do v\u1eady S7-400 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m c\u00e1c tr\u1ea1m master hay slave.\r\n\r\nT\u00ednh n\u0103ng chia s\u1ebb<\/strong>: C\u00f3 th\u1ec3 \u0111i\u1ec1u khi\u1ec3n gi\u00e1m s\u00e1t v\u00e0 l\u1eadp tr\u00ecnh th\u00f4ng qua c\u1ea3 2 giao di\u1ec7n (MPI v\u00e0 PD ) v\u00ed d\u1ee5 nh\u01b0 cho 1 thi\u1ebft b\u1ecb PG c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh v\u00e0 v\u1eadn h\u00e0nh cho nhi\u1ec1u CPU ho\u1eb7c nhi\u1ec1u thi\u1ebft b\u1ecb PG c\u00f3 th\u1ec3 truy c\u1eadp 1 CPU.\r\n\r\nGiao di\u1ec7n ph\u1ee5: Ngo\u00e0i giao di\u1ec7n MPI,DP, S7-400 c\u00f2n c\u00f3 them 1 s\u1ed1 c\u1ed5ng serial(PtP-Point to Point), n\u1ed1i c\u00e1c m\u00e1y qu\u00e9t . \u0110\u00e2y l\u00e0 giao di\u1ec7n RS422\/RS485 co ph\u00e9p t\u1ed1c \u0111\u1ed9 truy\u1ec1n 38.4Kbit\/s.\r\n\r\nM\u1ed9t s\u1ed1 CPU c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ea7u v\u00e0o ra \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 \u0111\u1ebfm ho\u1eb7c \u0111o l\u01b0\u1eddng c\u00e1c m\u00e1y ph\u00e1t xung, ho\u1eb7c c\u00f3 c\u00e1c ch\u1ee9c n\u0103ng t\u00edch h\u1ee3p \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n v\u1ecb tr\u00ed v\u1edbi nh\u1eefng \u0111\u1ea7u v\u00e0o ra \u0111\u1eb7c bi\u1ec7t.\r\n

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2. \u01afU \u0110I\u00ca\u0309M :<\/strong><\/h2>\r\n\u01afu \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i h\u01a1n so v\u1edbi c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n logic kh\u1ea3 tr\u00ecnh tr\u01b0\u1edbc n\u00f3 v\u1ec1 c\u1ea3 ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m. \u0110\u00f3 l\u00e0:\r\n