System Advantages

• Safety

  The product and application of VPI system have passed independent third-party SIL4 safety certification.
  
  VPI is the hot redundant computer interlocking system with the check CPU, and it adopts programmable safety system design technologies such as “NISAL technology”, “I/O port independent different check-word dynamic test in 50ms cycle”, “independent timer”, “double channels different software”, “inherent fail-safe”, “composite fail-safe” and “reactive fail-safe” to guarantee the system safety.

• Reliability

  VPI applies redundant technologies such as “collection sharing” and “paralleled output” to improve system reliability.

• Maintainability

  With open design language in application software , VPI system has good readability.
  
  With electronic-guided diagnostic functions, the output or input failure of VPI system can be tracked back to code level.
  
  VPI is provided with the function of online version validation so as to achieve process tracking and real-time version management.
  
  VPI is equipped with on-site simulation test interface. When the system is upgraded or under daily check, one set of equipment can be upgraded and tested while the other set maintains uninterrupted working.