I would like to ask about the forward and reverse actions of the Fisher positioner DVC6O3O
Thread Content
This post was last edited by zheng.nj on 2017-2-8 at 15:52. I would like to ask about the direct and reverse operation modes of the Fisher locator DVC6O3O, as well as how to adjust them via HART. I want to change a locator that operates in direct mode to reverse mode; I tried selecting option B “Reverse” under “Amplifier Type” in the HART setup wizard, and the entire setup process was completed successfully! Yet the mode still hasn’t been changed to reverse!
The forward and reverse operation of the valve is usually determined at the ordering stage. If you want to make changes through a HART communicator, I suggest setting the forward and reverse output of the controller within the DCS
The forward and reverse action of the positioner must match those of the actuator of the control valve; it cannot be chosen arbitrarily.
During debugging, make sure that the output of the actuator and the connections to the cylinder are properly connected in accordance with the instructions; the connections for direct-acting and reverse-acting types are generally different. Furthermore, the initial position of the valve switch must be correct; it should be set to a reactive mode with the valve in its closed position initially.