IC-Module for EtherNet/IP
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3 Overview
3.1 Introduction
With the KUNBUS-IC you can make a sensor or actuator fieldbus-
capable. To do this, simply insert the module into your application
and connect it to the fieldbus.
Illustration 1:
Module components
The KUNBUS-IC serves as a bridge between your application and
the fieldbus. On the application side there are 3 possibilities to
transfer the data to the module:
1. SSC - Serial Shift Chain
Very simple shift register modules are connected to the SPI interface of
the module. The KUNBUS-IC is the SPI master and reads or writes up
to 32 bytes of data from the blocks cyclically into its internal memory.
This is realized on our evaluation board with 2 input modules with DIP
switches and 4 output modules with LEDs.
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2. SPI - Serial Peripheral Interface
The KUNBUS-IC acts as an SPI slave. The SPI master can write or
read any data into the KUNBUS-IC However, in addition to the standard
SPI, a ready line must also be considered. This makes it somewhat
more difficult to connect the KUNBUS-IC to a master.
The max. Data rate is 20MBit/s.
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3. SDI - Serial Data Interface
Modbus RTU commands can be sent to the KUNBUS-IC via a UART
interface. Here, too, the master can read or write any data from the
KUNBUS-IC. Only two Modbus commands have to be implemented in
the master. This is the easiest way to implement the interface.
The maximum data rate is 115kBaud.
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Overview
