PROFIBUS MODULE (CB15/CB155)
English
Operating Instructions
5
During installation of the network you can configure on the master which PPO type is used to address the inverter
from the PROFIBUS-DP master. The choice of PPO type depends on the task of the drive within the automation
network. The process data is always transmitted. It is processed with the highest priority in the shortest time slices.
The process data is used for open-loop control of the drive in the automation network, e.g. switching on/off,
specifying setpoints, etc.
The parameter area provides the user with free access on the network to all the parameters located on the inverter,
e.g. for reading out detailed diagnostics information, fault messages, etc. This enables further information to be
called up on a higher-level system, such as a PC, for visualisation of the drive, without affecting the performance
capabilities of process data communication.
Control and operation of the CB15/CB155 via PROFIBUS-DP
All information required for the open-loop control of a variable speed drive in the network environment of an
industrial process is transmitted in the process data area
(see Figure 1)
. Control information (control words) and
setpoints are transmitted from the PROFIBUS-DP master to the inverter. Information on the status of the inverter
(status words) and actual values is transmitted in the opposite direction.
Figure 1: User Data Structure in the PROFIBUS-DP Message Frame
P a r a m e t e r s
Parameters (PKW)
Process Data (PZD)
Protocol Frame
(Header)
Protocol Frame
(Trailer)
The communication component of the interface board stores the received process data in the order in which it was
transmitted in the message frame. Each word in the frame is assigned a fixed function.
The CB15/CB155 supports the PROFIBUS-DP control commands FREEZE and SYNC.
A diagnostics parameter can be used to read detailed diagnostics information straight from the diagnostics memory
of the CB15/CB155.
