GE 5136-PFB-VME

Description

The 5136-PFB-VME card can:•act as a DP slave•act as a DP master•send and receive FDL (layer 2) messagesThe card supports simultaneous operation in all these modes.The card supports the standard ProfiBus baud rates of 9.6K, 19.2K, 93.75K,187.5K, 500K, 750K, 1.5M, 3M, 6M and 12M baud.The card has an onboard Intel i960 processor with 512 Kbytes of local RAM.,that handles the communication protocol and data formatting into the sharedRAM.The 5136-PFB-VME consists of:a VMEbus interface, with capabilities as outlined in the Specifications sectionof this manualfive registers in VME short address space for control of the cardThe card has an additional 256 Kbytes of RAM which is shared with the hostas either a single block of 256 Kbytes (linear addressing mode) or as one ofsixteen, 16 Kbyte pages (paged mode). In paged mode, the host determineswhich page of this shared RAM is mapped into the host memory by writing toa register on the card. This block of memory contains all the tables andbuffers that are used to pass information between the interface card and theapplication software running in the host computer. This approach ensures afast and simple connection between the host computer and the card software.In addition, the card has 512 Kbytes of sectored flash memory, for storage ofprograms and configuration data. ProfiBus configuration information mayalso be stored in flash.
For information on ProfiBus, refer to one of the following:•ProfiBus standard DIN 19 245 parts 1, 2 and 3. Part 1 describes thelow level protocol and electrical characteristics, part 2 describesFMS, part 3 describes DP•European standard EN 50170•ET 200 Distributed I/O System Manual, 6ES5 998-3ES22Refer to the IEEE Standard for a Versitile Backplane Bus: VMEbus, ANSI/IEEE Std. 1014-1987 for explanations of VMEbus Terminology.