# \#processcontrol **URL:** https://forumautomation.com/tag/processcontrol/19.md [Latest](https://forumautomation.com/latest.md) · [Categories](https://forumautomation.com/categories.md) · [Tags](https://forumautomation.com/tags.md) --- ## [Control valve symbols in P&id](https://forumautomation.com/t/control-valve-symbols-in-p-id/10897)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 0\ **Last updated:** [February 22, 2023, 6:02am UTC](https://forumautomation.com/t/control-valve-symbols-in-p-id/10897 "2023-02-22T06:02:44Z")
Control valves are used in process control systems to regulate the flow of fluid, gas or steam. These symbols are used in process flow diagrams, P&IDs (piping and instrumentation diagrams), and other engineering draw… --- ## [Fool Proof Controller, Electronic Controller in Process Control Industry](https://forumautomation.com/t/fool-proof-controller-electronic-controller-in-process-control-industry/10990)
**Author:** [@Sudha\_m](https://forumautomation.com/u/Sudha_m)\ **Replies:** 0\ **Last updated:** [March 22, 2023, 3:16pm UTC](https://forumautomation.com/t/fool-proof-controller-electronic-controller-in-process-control-industry/10990 "2023-03-22T15:16:37Z")
There are two main reasons industries automate manufacturing and fulfillment processes. Firstly, manual operations are expensive, and employee talents might be better allocated if repetitive jobs are done by machine… --- ## [What is meant by OPC & list the common ports used for OPC?](https://forumautomation.com/t/what-is-meant-by-opc-list-the-common-ports-used-for-opc/10953)
**Author:** [@Sudha\_m](https://forumautomation.com/u/Sudha_m)\ **Replies:** 0\ **Last updated:** [March 10, 2023, 11:30am UTC](https://forumautomation.com/t/what-is-meant-by-opc-list-the-common-ports-used-for-opc/10953 "2023-03-10T11:30:15Z")
What is OPC? OPC, is acronym of OLE for Process Control, is the name of a common communication interface used in automation engineering. The software objects or apps that supply their capabilities to other applicat… --- ## [PID Tuner : A free PID tuning tool](https://forumautomation.com/t/pid-tuner-a-free-pid-tuning-tool/9720)
**Author:** [@pidtuner](https://forumautomation.com/u/pidtuner)\ **Replies:** 0\ **Last updated:** [August 10, 2021, 8:52am UTC](https://forumautomation.com/t/pid-tuner-a-free-pid-tuning-tool/9720 "2021-08-10T08:52:27Z")
Take into account these tips for using it: --- ## [What is direct acting and reverse acting conroller?](https://forumautomation.com/t/what-is-direct-acting-and-reverse-acting-conroller/5972)
**Author:** [@Sajid](https://forumautomation.com/u/Sajid)\ **Replies:** 0\ **Last updated:** [February 22, 2019, 4:13am UTC](https://forumautomation.com/t/what-is-direct-acting-and-reverse-acting-conroller/5972 "2019-02-22T04:13:41Z")
The output of a proportional controller is "directly" proportional to the error. The error is the difference between the measured variable and the set point. Therefore, if the error increases, the output of the controlle… --- ## [Interview questions based Process Control Engineering](https://forumautomation.com/t/interview-questions-based-process-control-engineering/3279)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 13, 2018, 4:44pm UTC](https://forumautomation.com/t/interview-questions-based-process-control-engineering/3279 "2018-03-13T16:44:18Z")
1. Define process Any system comprised of a dynamic variable usually involved in manufacturing and production operations. It is defined as a series of operations during which some materials are placed in more useful stat… --- ## [What is Distributed Control System (DCS)?](https://forumautomation.com/t/what-is-distributed-control-system-dcs/2976)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [January 14, 2018, 7:45pm UTC](https://forumautomation.com/t/what-is-distributed-control-system-dcs/2976 "2018-01-14T19:45:38Z")
Distributed Control System DCS is the most commonly used control architecture in industrial process control. DCS can be defined as an architecture where the sub systems are geographically distributed and functionally in… --- ## [What is Loop Dynamics?](https://forumautomation.com/t/what-is-loop-dynamics/2533)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [October 29, 2017, 11:34pm UTC](https://forumautomation.com/t/what-is-loop-dynamics/2533 "2017-10-29T23:34:14Z")
Loop Dynamics Loop dynamics is the study of how the system process variable (PV) changes,as a function of time,in response to a sudden input change or upset. The upset may be caused by process disturbance,a load change… --- ## [Automating advice for a distillation machine for a research lab!](https://forumautomation.com/t/automating-advice-for-a-distillation-machine-for-a-research-lab/2063)
**Author:** [@jmcmahan](https://forumautomation.com/u/jmcmahan)\ **Replies:** 4\ **Last updated:** [June 21, 2017, 1:05pm UTC](https://forumautomation.com/t/automating-advice-for-a-distillation-machine-for-a-research-lab/2063 "2017-06-21T13:05:52Z")
Hello, I am attempting to make a distillation machine autonomous and I need some help with the electrical and programming aspect. I need to take 120V AC from a wall outlet and send it to the 115V 50/60 Hz distillation m… --- ## [What are the advantages and disadvantages of Cascade control?](https://forumautomation.com/t/what-are-the-advantages-and-disadvantages-of-cascade-control/1376)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [September 19, 2016, 4:00am UTC](https://forumautomation.com/t/what-are-the-advantages-and-disadvantages-of-cascade-control/1376 "2016-09-19T04:00:33Z")
Advantages of Cascade control Loop- -Isolating the slow outer loop from valve problems and some disturbances. Fast inner loop take care of these. Disadvantages of cascade control loop. -Additional measurement require…