Isochronous Enhanced Real-Time Ethernet Controller

www.renesas.eu 2012.01 Ethernet for isochronous, real-time communication

In recent years the trend in industrial automation has seen high performance networking of distributed drives and motion controllers becoming much more common. Technologies from the IT world are being increasingly used in industrial automation applications, one such technology is Ethernet. Some complex industrial automation tasks require hard real-time. However, conventional fast Ethernet switches are not capable of delivering data fast enough for motion control applications.

Combine isochronous real-time and IT data without compromise

Renesas Electronics’ new ERTEC devices give the opportunity to have one Ethernet switch to handle all the Ethernet traffic both conventional and real-time. In order to cover the requirements of automation to their full extent, the PROFINET standard specifies real-time features at two levels, Real-time (RT) and Isochronous Real-time (IRT). Using standard Ethernet switches RT performance can be obtained but to get reaction times well below 1 millisecond IRT must be running and this is where the ERTEC devices come into their own.

ERTEC – Enhanced Real-Time Ethernet Controller

To be able to take advantage of PROFINET with IRT running devices and still leave 50% of the bandwidth for IT communication. Renesas offer two new devices, called the ERTEC 200, which is a The performance matrix for the ERTEC real-time switches allows for 2 port switch with integrated PHY, and the ERTEC 400, a 4 port up to 150 control nodes at a cycle time of 1 millisec, with 6 MB/sec switch with Reduced Media Independent Interface (RMII) and PCI of simultaneously transferable TCP/IP data. interfaces. Based on the IEEE 802.3 transmission standard, the ERTEC hardware These devices can far outperform standard Ethernet switches and is designed to work with the PROFINET Real-time protocol. The guarantee data throughput for hard real-time critical motion control ERTEC hardware also supports the time stamping like in IEEE 1588.

2 www.renesas.eu Scalable PROFINET communication

PROFINET communication is scalable in three levels. Component Real-time (RT) communication enables cycle times in the order of based communication uses TCP/IP and enables cycle times in the order 10 ms and is well suited for use with distributed I/O. Isochronous real- of 100 ms. It is preferred for communication between controllers. time (IRT) communication enables cycle times less than 1 ms and is thus well suited for use in motion control applications.

Open TCP/IP Channel Open TCP/IP Channel Open TCP/IP Channel •• Device parameterization + Real-time channel RT + Real-time channel RT •• Reading of diagnostics data •• High performance transmission + Isochronous real-time •• Loading of interconnections •• Cyclic data channel IRT •• Negotiation of the communications •• Event controlled signals channel for user data •• High performance transfer •• Data in isochronous mode •• Jitter < 1 µsec

Target applications Key features of PROFINET PLC •• Protect previous investments-integrated proxy technology allows Motion control •• Monitoring and control •• Safety critical systems seamless integration of existing fieldbus systems, and not just •• Real-time control PROFIBUS systems. •• Sensor and actuator •• IRT communications interface •• Can simultaneously handle standard Ethernet transmissions •• Safety critical AND real-time transmissions at one millisecond speeds systems •• Hot swapping is possible so a single piece of machinery can be connected or replaced without affecting the whole system •• Works with any Ethernet TCP/IP network •• PROFINET with IRT running with a cycle time of one millisecond can control up to 150 nodes and still provide 50% bandwidth for IT communication Network switch •• Higher functional scope and performance than conventional •• Network management fieldbus systems •• RT communications •• Utilise standard industrial Ethernet connectors and software •• IRT communications Control panel •• Monitoring and control •• HMI interface

3 ERTEC 200 technical features

Key highlights of ERTEC 200 •• High-performance ARM946E-S RISC core •• 150 MHz max. clock frequency •• 4 Kbyte D-Cache, 8 Kbyte I-Cache •• 4 Kbyte D-TCM •• Integrated PLL •• Debugging capability via embedded ICE (JTAG) with real-time trace support •• Boot ROM •• 2-port switch •• 10/100 Mbit Ethernet support •• 64 Kbyte SRAM for telegram buffering •• Standard communication •• Real-time communication ERTEC 400 technical features •• Isochronous real-time data transfer •• Integrated PHYs for copper and optical cables •• Asynchronous (32-bit) interface •• SDRAM interface for 128 Mbyte external memory •• Local bus master interface •• Serial port •• SPI interface with master/slave capability •• Up to 45 I/Os •• 304-pin BGA package •• Power supply: 3.3 V and 1.5 V •• Temperature range: –40 ºC to +85 °C

Differences between ERTEC 200 and ERTEC 400

ERTEC 200 ERTEC 400 Key benefits of ERTEC technology Switching - Integrated switch for 2-port 4-port •• Cost savings due to switch integration in the device 10/100 Mbit Ethernet •• PCI interface (ERTEC 400 only) for optimal - SRAM on chip for 64 Kbytes 192 Kbytes integration into PC-based environments message buffering •• Highest degree of intelligence in the smallest space Integrated PCI interface (V2.2) •• Less external CPU power needed due to integrated 32 bit wide, max. 66 MHz ARM946E-S core PCI Interface No 5 V tolerant inputs •• Easy connection of devices to switched 10/100 Mbit PCI master/target capability Ethernet Power management support •• Open communication through compatibility to Integrated PHYs Yes No IEEE 802.3 On board DMA controller Yes No •• Support for redundant transmission features Parametrizable I/Os 45 32 Typical power consumption 0.99 W 0.72 W I/O devices and I/O controllers and PC based Applications field devices communications processors

4 www.renesas.eu ERTEC development tools

Using the ERTEC development kits, PROFINET hardware and software applications can be developed and tested using either the ERTEC 200 or 400 Ethernet Controller. Developers can set up a network with PROFINET Industrial Ethernet support straight out of the box and at low overall cost and effort. The ERTEC development environment consists of a set of hardware and software components to considerably reduce development costs for producing a PROFINET IO device such as an IO controller. Included in each of the kits are executable example applications and simulation software to kick start developing a PROFINET solution. The IRT-capable PROFINET IO device stack, that is included in source code, saves manyears of development work. Only customer-specific application software needs to be added on top of the OS.

ERTEC 200 Starter Kit ERTEC 200 and ERTEC 400 Development Kit

This entry level system allows developers to begin investigating The EB 200 (400) development board is designed to be operated as a PROFINET. Included with the kit is an evaluation version of the PC PROFINET IO device outside a PC; it helps you to try out various based Softnet IO Controller software. This kit is ideal for an initial memory configurations and boot options and is extendable with external evaluation. For more in-depth development work Renesas supplies the hardware. The kits are provided with the leading-edge open source ERTEC 200 and ERTEC 400 full development kits. RTOS eCos.

Hardware included Hardware included

EB 200 evaluation board EB 200 (400) evaluation board Evaluation board with ERTEC 200 as an evaluation environment for Evaluation board with ERTEC 200 or ERTEC 400 as an evaluation customized industrial applications. environment for customized industrial applications.

Hardware debug tool CP 1616 PC module for operation as IRT-capable PROFINET IO controller. Low-cost, JTAG-based hardware debug tool for download and test of customer application. Hardware debug tool Low-cost, JTAG-based hardware debug tool for download and test of Software included customer application. eCos operating system ERTEC 200 (400) samples Open source, royalty-free system. Fully functional version of Eclipse For developing customized hardware, 10 ERTEC 200 (400) components integrated development environment. are already included in the package.

Softnet PROFINET IO controller Software included PROFINET emulation software for PCs. Allows PROFINET communication between EB 200 board and PC via standard Ethernet I/F. eCos operating system Open source, royalty-free system. Fully functional version of Eclipse PROFINET IO device software example integrated development environment for download. Sample program for PROFINET IO device based on the ERTEC 200. PROFINET IO device software example PROFINET IO device stack software Sample program for PROFINET IO device based on the ERTEC 200 (400). The IRT-capable PROFINET IO device stack software is provided in PROFINET IO device stack software source code. The IRT-capable PROFINET IO device stack software is provided in source code.

5 Isochronous Enhanced Real-Time Ethernet Controller

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