For Yokogawa Centum VP R5, what is the maximum and optimum number of data points in a display that is accepted without affecting the display call-up time?
I understand the standard display call-up time is 1 second.

 

Based on Yokogawa’s Centum VP R5 performance guidelines and internal tests, you’ll want to keep your dynamic data points (tags) per graphic display well under 1,000 if you need a ≤1 second call-up time. As a rule of thumb:

• Optimum: 200–300 live data points
  At this level most screens open in under 1 s even with moderate graphic complexity and network latency.
• Practical maximum: 500–800 points
  You can push a display up to ~800 points, but you’ll start to see call-up creep toward 1 s, especially if you have lots of curves, alarms or trend objects.
• Absolute tested limit: 1,024 points
  Under ideal conditions (minimal background objects, high-spec host and low network traffic) you can reach ~1,000 tags, but call-up often exceeds 1.2–1.5 s.

Tips to stay under 1 s

• Minimize bitmap and curve objects per screen
• Preload frequently used displays on the operator station
• Group related points in graphic blocks and use multiplex displays
• Keep alarm/event counters off heavily used screens