This document introduces the frequently asked questions about SIPART PS2 valve positioner in terms of functionality, selection, and application. SIPART PS2 intelligent valve positioner by Siemens is widely recognized and widely used in the market due to its powerful features, stable control accuracy, long service life, and low energy consumption.
The Siemens SIPART PS2 intelligent valve positioner is designed with a microprocessor-based control unit that utilizes a piezo-valve for precise valve positioning. Unlike traditional mechanical nozzle-flapper controllers, the PS2 offers higher accuracy, lower energy consumption, and advanced diagnostic capabilities. It supports various communication protocols including HART, PROFIBUS PA, and FOUNDATION Fieldbus (FF).
The guide addresses common inquiries divided into three main sections: functional principles, pre-sales selection questions, and after-sales troubleshooting. Topics include the initialization process, the five-step switching program, non-contact sensor (NCS) applications, wiring configurations for two-wire systems, and specific parameter settings for feedback axes and valve characteristics. This manual is written in Chinese.
| Supported Communication Protocols | HART, PROFIBUS PA, FOUNDATION Fieldbus (FF) |
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The PS2 uses a microprocessor and piezo-valve for higher control accuracy and lower energy consumption, whereas mechanical controllers consume significantly more air regardless of adjustment actions.
Initialization is necessary to configure default parameters, determine valve direction of action, set zero and range points, define switching times, and optimize transient response based on the actuator type.
An NCS (Non-Contacting Position Sensor) is required when the operating environment's temperature, humidity, or vibration exceeds the limits that the positioner can withstand.
In the event of an air loss, the output pressures for Y1 and Y2 are locked inside the cylinder, causing the valve to maintain its current position.