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12-20-2002
Figure Sheet 1-851-A
Page 3
PROTOCOL AND SUPPORTED FEATURES
Fieldbus Type
PROFIBUS-DP EN 50 170 (DIN 19245)
Protocol Version
Version 1.10
Protocol Stack Supplier
Siemens
Auto Baud Rate Detection Supported
Baud Rate Range: 9.6 kbit to 12Mbit
PHYSICAL INTERFACE
Transmission Media
Profibus Bus Line, Type A or B Specified in EN 50170
Topology Master-Slave
Communication
Fieldbus Connector
9-Pin Female DSUB
Cable
Shielded Copper Cable, Twisted Pair
Isolation
The bus is galvanically separated from the other electronics with an on-board DC/DC
converter. Bus signals (A-line and B-line) are isolated via optocouplers.
Profibus DP Ccommunication IC
SPC3 Chip from Siemens
Producer/Consumer Model
The Producer/Consumer Model allows the exchange of information between a sending device
(“producer”) and many receiving devices (“consumer”) without requiring the same data to be sent
multiple times to different destinations. The producer sends the data once and each consumer on the
network receives the data at the same time. The data can be used (“consumed”) or ignored by each
receiving device independently. FifeNet uses the Producer/Consumer Model.
FifeNet
FifeNet’s deployment of the Producer/Consumer Model allows data sent by a single device to be
received simultaneously by multiple devices on the same network. Each receiving device can choose
to use (“consume”) the information or ignore it as its needs dictate. FifeNet is based on a fixed time
slicing architecture where transmitting devices send data in fixed, predetermined time intervals.