Solve
Thread Content
This post was last edited by Autumn Morning on 2018-1-15 at 20:20. I hope experts can explain what it means in English
I’m not sure what the problem is; it’s not clear to me This diagram includes the display signals of DCS and SIS. In the first diagram, U1006 is the on/off valve; UY1006 is the solenoid valve for this on/off valve, which is controlled by the SIS logic, and the DCS displays the on/off status of U1006
In this diagram, the switch status of UV1009 is displayed on the SIS, and UV1009 is controlled by a DCS switch as well as the button HS1017.
For the SIS circuit, refer to the interlock logic diagram for details
This is a schematic diagram in a PID diagram showing the valve signals that are involved in the interlock system; the interlock number is IS107. The valves involved include the on/off valve UV1009 and the solenoid valve UY1009, as well as the signal indicating when the ZSC valve is closed and the signal indicating when the ZSO valve is opened. There is also a manual switch on-site and a switch on the control panel in the remote control room. Such valves are often used in interlocks related to the isolation of tank pumps, and the specific logic depends on the conditions and outcomes specified by the design interlock IS107. Hope to communicate more!
The first diagram is rather blurry; it is also a schematic of valve interlocking. The difference from the second diagram is that valve feedback should not be part of the interlocking mechanism. Generally, markings with IS indicate circuits that are involved in interlocking logic, while those in the DCS system should be marked as I, without an S.
Check the explanation on the fifth floor; it’s very detailed there
The trigger conditions are the on-site switch and DCS soft switch, while the actuator is a shut-off valve with valve position feedback.
IA refers to instrument air, which is short for Instrument air; AV stands for exhaust gas