Elevator Controllers and Microprocessor Controls
How elevator controllers decide when and how a car moves, and how a mechanic reads, tests and troubleshoots them, followed through Northcrest Elevator's Seattle jobs: relay logic and the safety circuit, relay prints and run sequences, microprocessor controller architecture, inputs, outputs and serial links, certified safety boards, landing systems and encoders, speed profiles and leveling, group and destination dispatch, fire service and emergency power operation, fault logs and remote monitoring, and a capstone diagnosis of an intermittent controller fault, with ASME A17.1 and Washington L&I requirements throughout.
ELV-310 12 lessons · 4 h 23 min ▶ Video lessons coming soon
Offered by HSM University · Elevators
This is the American version of this course. See the Canadian version.
What you'll learn
- Describe the jobs every elevator controller performs, compare relay and microprocessor controllers, and explain collective selective operation and where controllers are located
- Explain relay logic and the safety circuit, list the electrical protective devices of a traction car, explain redundancy and checking, control jumpers, and locate an open device efficiently
- Read relay controller prints and cross-references, follow the sequence of a run step by step, use a sequence record to find a changed step, and handle differences between prints and wiring
- Describe the building blocks of a microprocessor controller, explain scans, watchdogs, software versions and parameters, and diagnose power supply, grounding and noise problems
- Wire and test inputs and outputs of the correct type, explain serial links, addressing, termination and message checking, and work with car top stations and load weighing devices
- Explain how certified programmable electronic systems perform safety functions under IEC 61508 and ISO 22201-1, how two-channel safety boards work, and what a mechanic may and may not do with them
- Explain mechanical selectors, vanes, tapes, encoders and absolute positioning, carry out and check a learn run, and diagnose stopping and position errors from their patterns
- Calculate jerk-limited speed profiles and flight times, explain distance-to-go control, analyze stopping accuracy and ride quality, and describe terminal stopping devices
- Explain how group controllers assign calls, how destination dispatch groups passengers, how accessibility is provided, and calculate round trip time, interval and handling capacity
- Explain and test firefighters' emergency operation Phase I and Phase II, emergency power operation, independent service, seismic operation and other special operations
- Use service tools, meters, scopes, data loggers, fault logs and remote monitoring to diagnose faults and plan maintenance, and secure remote access
- Diagnose an intermittent controller fault by gathering history, defining the fault, testing hypotheses, fixing the root cause, verifying the repair and writing a complete report
Course content
12 lessons · 4 h 23 min total · final exam
- 1 What an elevator controller does 23 min · quiz
- 2 Relay logic and the safety circuit 24 min · quiz
- 3 Reading relay controller prints and sequences 22 min · quiz
- 4 Microprocessor controllers and their architecture 21 min · quiz
- 5 Inputs, outputs, serial links and car-top stations 20 min · quiz
- 6 Safety PLCs and programmable electronic safety systems 22 min · quiz
- 7 Landing systems, encoders and absolute positioning 21 min · quiz
- 8 Motion control: speed profiles, jerk and leveling 21 min · quiz
- 9 Group dispatching and destination dispatch 22 min · quiz
- 10 Special operations: fire service, emergency power and independent service 23 min · quiz
- 11 Diagnostic tools, fault logs and remote monitoring 21 min · quiz
- 12 Capstone: diagnosing a controller fault 23 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
How elevator controllers decide when and how a car moves, and how a mechanic reads, tests and troubleshoots them, followed through Northcrest Elevator's Seattle jobs: relay logic and the safety circuit, relay prints and run sequences, microprocessor controller architecture, inputs, outputs and serial links, certified safety boards, landing systems and encoders, speed profiles and leveling, group and destination dispatch, fire service and emergency power operation, fault logs and remote monitoring, and a capstone diagnosis of an intermittent controller fault, with ASME A17.1 and Washington L&I requirements throughout.