Modicon M251 Plc Page 9 Modicon M251 logic controllers

9 Presentation (continued) Modicon M251 logic controllers Embedded communication Embedded connection (continued) Control architecture for modular machines on CANopen bus Ethernet CANopen TM251 MESC ATV 312 Lexium 32 Modicon OTB Modicon TM7 TM251MESC controllers have an embedded CANopen Master port. v The link can be configured between 20 Kbps and 1 Mbps and supports up to 63 slaves with 252 TPDO (1,008 words) and 252 RPDO (1,008 words). v CANopen-based architectures can be used to distribute I/O modules as close to the sensors and actuators as possible, thus reducing wiring costs and times, and to communicate with different devices such as variable speed drives, servo drives, etc. v The CANopen configurator is integrated in the SoMachine software and can also be used to import standard description files in EDS format. For CANopen connection cables and accessories, see page 16. Communication over SAE J1939 The SAE J1939 protocol is available on the CANopen port on TM251MESC logic controllers. The SAE J1939 protocol is primarily used in commercial vehicles to communicate with the various electronic control units embedded in a vehicle, such as the engine, transmission, braking system, retarder, and dashboard. Serial link Each M251 controller has an embedded serial link that can be configured as RS 232 or RS 485. In addition, a 5 V/200 mA power supply is available on the RJ45 connector that allows the use of a Magelis XBTN or XBTRT HMI, the Bluetooth TCSWAAC13FB communication adapter, or other devices. This link incorporates the two main market protocols: v Modbus ASCII/RTU Master or Slave v ASCII character string For serial link connection cables and accessories, see page 14. Programming port with power off charging function Every M251 controller has an embedded programming port, equipped with a USB mini-B connector, dedicated to communication with a PC equipped with SoMachine for: v programming v debugging v maintenance In addition, it offers the ability to upload an application program or update the irmware without the controller being powered by another source. 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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