Technical data

Network configuration
3.3 Frame transmission time
PROFIBUS Network Manual
62 System Manual, Edition 04/2009, C79000-G8976-C124-03
Checking the bus parameters
Based on the entries made, the configuration tool can check whether the slot time is feasible
in the selected communication profile. If the additional delays of OLM and FO cables mean
that the system would exceed the value, the parameters are adapted. The newly calculated
bus parameters are displayed in the "Bus Parameters" dialog.
Figure 3-6 Bus parameters adapted to the system
3.3.3 Configuring redundant optical rings with OLMs
Configuring redundant optical rings with OLMs
The following configuration conditions must be satisfied in redundant optical rings:
● An unused address lower than the HSA (Highest Station Address)
● Increased retry value to at least the value 3
● Checked and adapted slot time
To set the parameters in 2. and 3., use the user-specific profile of the configuration tool.
There is an example of applying the bus parameters in STEP 7 at the end of this section.