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Section 9: EPI2 DVP1 Power-Up
August 2022
Consistent is an attribute that specify the capability of the module to maintains data
consistency over the entire data length. In this way, the data will not change during
the reading by the Profibus DP-Master. For example, if module 2 is selected, the output
telegram consists in 4 bytes, and the input telegram in 6 bytes.
When parameters and configuration are correct, the module enters in "data exchange
mode" and starts with normal operation. The master cyclically sends commands to the
slave and read its status. Figure 38 shows the power-up flow diagram of a DP slave.
Figure 38
24
Power on
Wait
parameterization
Configuration
Wait
not OK
configuration
Slave fault
Data Exchange
code
Installation, Operation and Maintenance Manual
Set slave
address
Check
parameters
Parameterization
correct
Check
configuration
Configuration
correct
Cyclic data
exchange
VCIOM-17121-EN Rev. 0
EPI2 DVP1 Power-Up
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