Power Electronics ProfiPower SD700 Type 1, Руководство пользователя

Страница: 23 / 45

POWER ELECTRONICS SD700
–
PROFIBUS
TRIAL RUN
21
E
N
G
L
I
S
H
4. TRIAL RUN
4.1. Introduction
Profibus board is a Profibus-DP slave with the following
characteristics:

Modular station with 4 modules.
 Diagnosis with status message.
Before beginning the information exchange between the slave and the
Profibus network, the slave should be configured by the master. There
are several main services that are described below.
4.1.1. Diagnosis
Between the standard continuous cycles of communication and in
the beginning stage of the network, the master sends continuous
diagnosis messages. These messages allow the master to know if a
new slave has been configured by reading the status in the network
of the drive.
The master supplies the required parameters and configurations that
still have not been installed.
Once the slave is into the network, diagnosis data exchange is only
used by the slave to notify the master a change in the operation
status. The use of these messages is extensive to notify errors in the
communication board.
4.1.2. Set up
The set up messages are frames (up to 244 bytes of length) that
contain all of the configuration parameters of the Profibus board.
The board uses this information to configure the Modbus
communication before entering in data exchange mode.