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Modicon M251 logic controllers - Modicon M251 Plc Page 9




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 TPDO (1008 words) and 252 RPDO (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 integrated in the SoMachine software and can also be used to import standard description files in EDS format. CANopen connection cables and accessories: please consult our website www.schneider-electric.com. Communication on SAE J1939 network The SAE J1939 protocol is available on the CANopen port of the TM251MESC logic controller. The SAE J1939 protocol is mainly used in the commercial vehicles sector to communicate with the various electronic control units embedded in the same vehicle such as the engine, transmission, braking system, retarder and dashboard, etc. Serial link Every M251 controller has an embedded serial link that can be configured as RS 232 or RS 485. In addition, a 5 V/200 mA voltage is available on the RJ 45 connector, which can therefore power a Magelis XBTN or XBTRT HMI or the TCSWAAC13FB Bluetooth communication adapter, or other devices. This link incorporates the two most commonly used protocols on the market: v Master or Slave Modbus ASCII/RTU v Character string (ASCII) Connection cables and accessories for serial link: please consult our website www.schneider-electric.com. Programming port with power off charging function The programming port, equipped with a USB mini-B connector, is embedded in every 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 firmware without the controller being powered by another source.

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