ASME A17.1-CSA B44 - 2009 PDF

ASME A17.1/CSA B44  Safety Code for Elevators and Escalators
Revision / Edition: 07      Chg: ADB      Date: 12/30/09Includes:1.       ASME A17.1   - Amendment Only    Revision / Edition: 07      Chg: ADB      Date: 12/30/092.       ASME A17.1   - Amendment Only    Revision / Edition: 07      Chg: ADA      Date: 12/05/083.       ASME A17.1   - Base Document Only    Revision / Edition: 07      Chg:               Date: 04/06/07

Document Abstract:A17.1 covers the design, construction, operation, inspection, testing, maintenance, alteration, and repair of the following equipment, its associated parts, and its hoistways, where located in or adjacent to a building or structure: (a) hoisting and lowering mechanisms, equipped with a car or platform, which move between two or more landings. This equipment includes, but is not limited to, elevators; (b) power driven stairways and walkways for carrying persons between landings. This equipment includes, but is not limited to escalators and moving walks; (c) hoisting and lowering mechanisms equipped with a car which serves two or more landings and is restricted to the carrying of material by its limited size or limited access to the car. This equipment includes, but is not limited to, dumbwaiters and material lifts.
 control station is a complete computer, you can actually run without being connected with the operation of stations and offline, complete the process control strategies to ensure that plant operation. From the computer system architecture, the controller is a dedicated process control computer, the microprocessor from the 8-bit to today's 32-bit or even 64-bit. Controller as a complete computer, its main I / O devices for on-site input and output processing equipment, which process the input / output (PI / O), including signal conversion and signal conditioning, A / D, D / A conversion . In the signal conversion process using isolation techniques to prevent signal interference from the field and connected with on-site terminals, and input and output signals of the physical location for easy identification, this is essential.
 Controllers are the basis for the DCS, its reliability and safety of the most major, crash, and out of control phenomenon is absolutely not allowed, but redundant, power failure protection, anti-electromagnetic interference, and other aspects of the system constitutes a valid proof and reliable, in order to meet user requirements.