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Chapter 4 PROFIBUS communication
Manual VIPA System 200V
4-10
HB97E - CPU - RE_21x-2BM03 - Rev. 14/44
Commissioning and Start-up behavior
In delivery the CPU is overall reset. The PROFIBUS part is deactivated and
its LEDs are off after Power ON.
The DP master can be served with bus parameters by means of a
hardware configuration. As soon as these are transferred the DP master
goes online with his bus parameter. This is shown by the RUN LED. Now
the DP master can be contacted via PROFIBUS by means of his
PROFIBUS address. In this state the CPU can be accessed via PROFIBUS
to get configuration and DP slave project.
If the master has received valid configuration data, he switches to
Data
Exchange
with the DP Slaves. This is indicated by the DE-LED.
After PowerON respectively a receipt of a new hardware configuration the
configuration data and bus parameter were transferred to the DP master.
Dependent on the CPU state the following behavior is shown by the DP
master:
•
The global control command "Clear" is sent to the slaves by the master.
Here the DE-LED is blinking.
•
DP slaves with f
ail safe mode
were provided with output telegram length
"0".
•
DP slaves without
fail safe mode
were provided with the whole output
telegram but with output data = 0.
•
The input data of the DP slaves were further cyclically transferred to the
input area of the CPU.
•
The global control command "Operate" is sent to the slaves by the
master. Here the DE-LED is on.
•
Every connected DP slave is cyclically attended with an output telegram
containing recent output data.
•
The input data of the DP slaves were cyclically transferred to the input
area of the CPU.
Start-up on
delivery
Online with bus
parameter without
slave project
Slave
configuration
CPU state controls
DP master
Master behavior at
CPU STOP
Master behavior at
CPU RUN