What is the logic a Transmitter control a Control Valve?
How the signal going to the Control valve?
What are systems/Panels/cables/signal used to control valve
from Transmitter?

Answer Posted / satish

TRANSMITTER WILL GIVEN OUTPUT TO THE CONTROLLER THROUGH
MARSHLLING PANEL THATS CALL PROCESS VALUE,CONTROLLER WILL
GET PROCESS VALUE AS PER CONTROLLER SET POINT THAN FROM
MARSHALLING PANEL THERE IS TWO WIRE/FOUR WIRE SYSTEM AS PER
MARSHALLING CONNECTION OUTPUT WILL GO TO THE CONTROLL VALVE
THAT CALL MANIPLATED VALUE (MV)

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