Introduction
ASCII | 3964R | RK512
2
Introduction
The SPI 3 (SERIAL-PROFIBUS-INTERFACE 3) allows a PROFIBUS-DP master to com-
municate with a fieldbus device with a serial interface. This allows the fieldbus device to
function as a real PROFIBUS station, whereby the SPI 3 converts the data to be ex-
changed between the PROFIBUS-DP master and the fieldbus device into a format which
is compatible with the other device.
Data is exchanged between the DP master and the SPI 3 in the form of telegrams or tele-
gram fragments through a data channel, the size of which can be configured to adapt it
to the telegram length and the size of the PLC I/O area. The data channel consists of a
send channel and a receive channel.
The SPI 3 is easy to install and configure and a separate program for configuration or pa-
rameter setting is not necessary. Configuration is done using the respective PROFIBUS-
DP master.
Features of the SPI 3:
· DP slave at up to 12 Mbit/s
· Serial baud rates up to 57.6 kbit/s
· Versions available for RS232, RS422 or RS485 serial interface
· Function blocks for SIMATIC S5/S7 (Included in Documentation & Media-Kit)
· Does not require special configuration software
· Simple and fast Integration in PROFIBUS-DP networks
· I/O range configurable from 2 to 64 data words
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Example for SPI 3 interface module overview
