02-03-2012, 04:47 PM
Smart Sensor
[attachment=17907]
Bi-directional MODBUS page link to DCS
Analyzer returns MEASUREMENT and STATUS value for control action
DCS sends commands and key process parameters
Product TYPE Sets:
Measurement parameters
Calibration equation (model)
Process STATE Sets:
Instrument response (“Auto” cruse control)
Rapid process change = short time constant
Stead state=long time constant
DCS signal triggers raw data save when:
Routine samples pulled for lab analysis (low frequency activity)
Non-standard conditions exist
DCS initiates calibration update based on:
Lab data
Corresponding instrument data
