The PC fieldbus cards from the FC312x series for Profibus enable connection via the PCI Express interface. In contrast to PCI, PCI Express accommodates a considerably higher quantity of data, so the complete transfer defined by the Profibus specification can be exploited. The fieldbus cards can be used as single-channel (FC3131) or dual-channel (FC3122) Profibus masters or slaves, in dual-channel mode the two channels act independently of each other.
The fcards can also be equipped with the FC600x Novram modules. Secure data can be transmitted to another fieldbus card with this memory module, ensuring high availability of the machine or plant controller. Novram cards with memory capacities of 128, 256 or 512 KB, are available.
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The purpose of this particular article is to try and give those unfortunate enough to have to use SWAG (scientific wild ass guess) tuning a bit of an idea of how to go about it, and even more importantly some understanding of a couple of basic principles.
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