Profibus Network Architecture & Design Flashcards
7 cards from real CPE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Profibus Network Architecture & Design flashcards as text
What is the maximum number of stations (including repeaters) allowed on a single Profibus DP segment?
Answer: 32
A single Profibus DP segment supports a maximum of 32 stations, including the repeater if used.
Which Profibus DP topology supports the longest cable runs at 9.6 kbps?
Answer: Bus (line) topology
Profibus DP uses a bus (line) topology as its standard configuration, and at 9.6 kbps allows cable segments up to 1200 meters.
In a Profibus DP network, what role does the Class 2 master (DPM2) serve?
Answer: Provides engineering and diagnostic functions
The Class 2 master (DPM2) is used for configuration, commissioning, and diagnostic purposes rather than cyclic I/O control.
When cascading Profibus DP repeaters, what is the maximum number of repeaters that can be connected in series?
Answer: 9
Up to 9 repeaters can be cascaded in series on a Profibus DP network, allowing extension of both distance and station count.
Which Profibus DP GSD file parameter defines the maximum permissible response time for a slave device?
Answer: MaxTsdr
MaxTsdr (Maximum Slave Data Response time) in the GSD file specifies the maximum time a slave may take to respond to a master request.
What happens on a Profibus DP network if a slave does not respond within the watchdog timeout period?
Answer: The slave is marked as failed and outputs go to a safe state
If a slave's watchdog timer expires (no valid master communication received), the slave transitions to a safe state and sets its outputs accordingly.
In Profibus DP, which transmission medium is used in the RS-485 physical layer standard?
Answer: Twisted pair shielded cable
Profibus RS-485 uses a shielded twisted pair cable (STP) as its standard transmission medium to reduce electromagnetic interference.