Modicon M251 Plc Page 9 Modicon M251 logic controllers

9 Presentation (continued) Modicon M251 logic controllers Embedded communication Embedded communication (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 master CANopen port. v The link can be configured between 20 Kbps and 1 Mbps and supports up to 63 slaves with 252 TPDOs (1008 words) and 252 RPDOs (1008 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 embedded in the SoMachine software and can also be used to import standard description files in EDS format. Cordsets and connection accessories for CANopen (see page 16). 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 RJ 45 connector, allowing use of a Magelis XBTN or XBTRT HMI or the Bluetooth TCSWAAC13FB communication adapter, or other devices. This link incorporates the two most commonly used protocols on the market: v Modbus ASCII/RTU Master or Slave v ASCII character string Connection cables and accessories for serial link (see page 14). Programming port with power off charging function The programming port, equipped with a USB mini-B connector, is embedded in each M251 controller; it is dedicated to communication with a PC equipped with SoMachine for: v programming v debugging v maintenance In addition, it offers the ability to load 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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