CPE Profibus Network Architecture & Design 3

Question 1

What is the purpose of the Profibus DP 'Freeze' command issued by a master to a group of slaves?

Accepted Answer

Freezes slave input data until a subsequent Freeze or Unfreeze command

Answer

The Freeze command causes a group of slaves to capture and hold their current input data until the master issues another Freeze or Unfreeze command.

Question 2

On a Profibus DP network operating at 1.5 Mbps, what is the maximum recommended cable segment length?

Accepted Answer

400 m

Answer

At 1.5 Mbps, the maximum recommended segment length for Profibus DP RS-485 cabling is 400 meters.

Question 3

Which Profibus DP diagnostic type is reported by a slave when a hardware fault is detected within the slave itself?

Accepted Answer

Station diagnostics

Answer

Station diagnostics (Stat_Diag) are provided by the slave to report general hardware faults or conditions that apply to the entire slave station.

Question 4

In Profibus network design, what is the primary function of a bus terminator?

Accepted Answer

Prevents signal reflections at the cable ends

Answer

Bus terminators absorb the signal at each end of the Profibus cable segment to prevent reflections that could corrupt data transmission.

Question 5

What Profibus DP mechanism allows a master to synchronize the outputs of multiple slaves simultaneously?

Accepted Answer

Sync command

Answer

The Sync command instructs a group of slaves to simultaneously apply their last received output data, enabling synchronized output updates across multiple slaves.

(CPE) Certified Profibus Engineer Practice Test

(CPE) Certified Profibus Engineer Practice Test

CPE Profibus Network Architecture & Design 3