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A Next Generation OCS OCS connectivity to (aka the Evil Empire) Rockwell Automation.

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Presentation on theme: "A Next Generation OCS OCS connectivity to (aka the Evil Empire) Rockwell Automation."— Presentation transcript:

1 A Next Generation OCS OCS connectivity to (aka the Evil Empire) Rockwell Automation

2 A Next Generation OCS What if I want more than an Ethernet/IP I/O Connection and its 256 Byte limit? There are several options for communicating with A-B products DF1 full duplex serial is available as a downloadable serial protocol With an affordable external device, Allen-Bradley Ethernet and Ethernet/IP are also an option A-B Connectivity

3 A Next Generation OCS PCCC & CIP are the two Protocol families supported by Rockwell What is PCCC? It is the application layer message packet of DF1 It allows you to issue poll/response messages to arrays of A-B data (register/table/file) It is the core message that moves easily between DF1, DH485, DH+, AB/Ethernet & Ethernet/IP with PCCC encapsulation What is CIP? As discussed - Common Industrial Protocol Used in ControlLogix & CompactLogix CPUs It is Object Oriented - services are sent to specific instances of objects. It is not based on accessing arrays of file data. A-B Protocol Families

4 A Next Generation OCS A summary of A-B protocols existing over a variety of media RS-232 DF1 Full Duplex. The core protocol spoken by most A-B PLCs. Is proprietary but published. DF1 Half Duplex. Very slow and rarely used. DF1 Radio. Recently added in approx. 2003. DF1 to Logix CPU. Encapsulates fragmented CIP messages within DF1. Not documented. RS-485 DH485. A proprietary (closed), token passing network allowing slaves to talk directly to one another. Does not work over Ethernet or radio due to token speed. Some 3rd parties attempt to support it in a “single master” mode - which often doesn’t work. A-B Protocols

5 A Next Generation OCS A summary of A-B protocols existing over a variety of media Ethernet AB/Ethernet. Sometimes called CSP. An older TCP port 2222 protocol from the PLC5E. Very closely related to DF1 & DH+. Only works on non-CIP messaging. A-B would like to obsolete it. Ethernet/IP. Can move CIP or even DF1 encapsulated messages. In its non- encapsulated form is object based and not register/table/file based like DF1. Others DH, DH+. Older, proprietary token bus systems. NOT RS-485 based, but requires custom hardware. A-B wants to move these users over to ControlNet. A-B Protocols

6 A Next Generation OCS Directly supported through OCS Downloadable Protocol Lowest Cost Works with virtually all A-B PLCs Good solution for MicroLogix, SLC OCS Connectivity to A-B MicroLogix XLe OCS SLC 5 NX OCS DF1 Protocol Dialog DF1 Serial

7 A Next Generation OCS ControlLogix CompactLogix Indirectly supported - requires an economical gateway solution (IAP Gateway) Connection at OCS end can be either serial OR Ethernet OCS Connectivity to A-B A-B/Ethernet LX OCS IAP Gateway SLC 5/05 PLC-5E AB/Ethernet DF1 RS-232

8 A Next Generation OCS ControlLogix CompactLogix IAP Gateway re-configures and re-routes Modbus/TCP messages to/from A-B PLC via Ethernet/IP A-B PLC responds to traffic as if it were coming from another A-B product OCS Connectivity to A-B Ethernet/IP (non CIP based) QX OCS IAP Gateway Modbus/TCP Ethernet/IP


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