Smart Factory - Simatic S7 driver

S7 CMX - Java and .NET driver

Possible applications of S7 CMX include

• Control and monitoring of assembly lines
• Production documentation
• Statistical process control (SPC)
• Visualisation

OSI via TCP/IP according to RFC1006 is used as the connection protocol. This protocol is also referred to as „ISO-on-TCP“ or CMX in the S7 environment and allows telegram-orientated communication. Telegrams can be sent from the S7 side using the „AG_SEND“ function. In each cycle, „AG_RECV“ must be called in order to receive telegrams again.

The connection is established on the Java side using the class: com.sf.s7cmx.S7Connection. A telegram can be sent here using the „send“ method. Telegrams can be received by implementing the abstract method „receive“.

The result is communication according to the ISO/OSI model. TCP/IP and Ethernet are used for the actual data transfer. Communication via telegrams enables event-driven applications, i.e. the Simatic S7 PLC can trigger actions on the part of the higher-level controller.

The realisable response times are in the region of approx. 100ms. S7 CMX supports both active and passive mode. By using 100% Pure Java, the S7 communication module is available on all common platforms. A demo version can be requested for evaluation purposes. The source code of a sample application and the documentation of the Java API are included.

Java versions 1.4, Java 6 and 7 are currently supported. The S7 CMX driver is also available as a .NET version for Windows.

Features:

• Implementation OSI via TCP/IP according to RFC1006
• Active / passive mode
• Event-driven applications
• Support for all common platforms (Windows, Linux, UNIX)
• 100% Pure Java
• Object-orientated API
• Response times of 100ms possible