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Supported data types include BOOL, SINT/BYTE, INT, DINT, DWORD, REAL and Arrays. Read/Write Global Tags in ControlLogix PLC including arrays ControlLogix PLC systems are products developed and distributed by Rockwell Automation USA. Siemens S7 PLC systems are products developed and distributed by Siemens AG Germany. Sigma is a Licensed Vendor and Member of ODVA. The common interest of ODVA’s Members is the development and promotion of open and interoperable information and communication technologies for these applications. ODVA is an international trade and standards development organization whose 300+ corporate members comprise the world’s leading suppliers of products and systems for industrial automation applications. No further programming is required as the S7 PLC becomes a native EtherNet/IP TM communicator with the Sigma S7 EtherNet/IP TM driver. The only requirement to read existing tags in the Rockwell ControlLogix PLC is to know its IP Address, the slot number of the CPU and the names of the Global Tags you would like to read and write. Prepare the Data Table Read or Data Table Write Functions as desiredĬall the Sigma S7 EtherNet/IP TM Co-ordinator Function Block in the user program

There are just three simple steps to achieve communications,Ĭreate a TCP Connection to the Rockwell ControlLogix PLC The Function Blocks utilise the S7 PLC compatible CPU’s integrated Ethernet port or a dedicated Siemens Communications Processor module. Sigma has developed Function Blocks for the current Siemens S7 PLC range of controller to allow the S7 PLC’s to natively communicate with EtherNet/IP TM protocol. Siemens S7 PLC EtherNet/IP TM CIP Connected Message Class 3įunction Blocks for CompactLogix/ControlLogix PLC Peer-to-Peer Communication