CPE Study Guide 2026
Everything you need to pass the CPE exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CPE Exam Format at a Glance
📚 CPE Topics to Study (37)
✍️ Sample CPE Questions & Answers
1. What is the maximum segment length for PROFIBUS DP at 12 Mbit/s using Type A cable?
At the maximum 12 Mbit/s baud rate, the segment length is limited to 100 meters due to signal propagation and timing constraints.
2. In PROFIBUS DP, what happens when two masters have the same station address configured?
Duplicate master addresses cause token ring initialization failures and can disrupt all communication on the bus segment.
3. What is the maximum number of nodes (including masters and slaves) on a single PROFIBUS segment without repeaters?
A single PROFIBUS segment can have up to 32 nodes; repeaters are required to extend beyond this limit.
4. What device acts as a master in Profibus?
In a Profibus network, a master controller, such as a PLC (Programmable Logic Controller) or a DCS (Distributed Control System), initiates communication and controls the data exchange with slave devices. The master polls the slave devices for data and sends commands, orchestrating the entire communication process. Slave devices, like sensors and actuators, only respond when addressed by the master.
5. When a PROFIBUS GSD file specifies 'Freeze_Mode_supp = 1', what commissioning capability does this enable?
Freeze_Mode allows the master to issue a global freeze command, causing multiple slaves to simultaneously latch their input data for synchronized acquisition.
6. How does the CPE body of knowledge relate to daily professional practice?
The body of knowledge provides the framework guiding daily decision-making and practices.