This article shows how to commission PROFIBUS DP communication with the Revolution Pi.

Hardware

RevPi Core 3+
Gateway module for PROFIBUS
PROCENTEC ProfiCore Ultra PROFIBUS Master

Instructions

We want to configure the PROFIBUS network as follows:

Item	Master	Slave

Item	Master	Slave
Node-ID	1	5
Module Configuration		2 Bytes input/output

Hardware setup

Connect the Revolution Pi Module and the Modular Gateway PROFIBUS Module with the PiBridge adapter.

Switch the DIP switches of the Modular Gateway PROFIBUS Module to node address 5.

Connect the PROFIBUS cable between the master and the slave module

Revolution Pi Configuration

Perform the PiCtory configuration

Reset the PiControl driver “piTest -x”

Check that the configuration has been applied and shows the two devices:

pi@RevPi35745:~ $ piTest  -d
Found 2 devices:

Address: 0 module type: 95 (0x5f) RevPi Core V1.2
Module is present
     input offset: 1024 length: 6
    output offset: 1030 length: 5

Address: 31 module type: 77 (0x4d) Gateway Profibus V1.0
Module is present
     input offset: 0 length: 244
    output offset: 512 length: 244

Check the power LEDs are lighting green. If not, check the PiBridge adapter and the power supply.

Perform a constant change of the first two bytes of the output data, i.e., like so:

pi@RevPi35745:~ $ O1=3 O2=4; while true; do let "O1=$O1+1"; let "O2=$O2+1"; piTest -w Output_1,$O1; piTest -w Output_2,$O2; sleep 1; done

ProfiCore

Download the GSD file for the Modular Gateway PROFIBUS

Import this GSD file in the PROFIBUS Master

Configure the PROFIBUS Network. You may use “Load Project” with this configuration

Switch the PROFIBUS Master Operational

PROFIBUS cyclic data exchange

Perform a constant change of the first two bytes of the output data, i.e., like so on the RevPi:

pi@RevPi35745:~ $ O1=3 O2=4; while true; do let "O1=$O1+1"; let "O2=$O2+1"; piTest -w Output_1,$O1; piTest -w Output_2,$O2; sleep 1; done

Let the first two output bytes of the PROFIBUS Master perform some changes using the watch I/O dialog, i.e., decrease and increase.

Monitor the cyclic data exchange via the ProfiCore software

Check

Modular Gateway PROFIBUS Module

LED	Status

LED	Status
Power	GrEEN
Online	Green
Offline	off
Fault	off

Revolution Pi Module

LED	Status

LED	Status
Power	GrEEN
A1	don't care
A2	don't care

Knowledge Base Support

Commissioning RevPi PROFIBUS