Answer / himanshu apte

As i understand the question, If 'D' value in PID is
changed, the process responds to the rate of change of
error between the PV & SP. In operation, controller first
compares current PV with the last PV value. If there is a
change in slope of PV, controller determines the output at
a future point in time. This future point in time
represents the derivative setting. Derivative mode
increases the output by that amount.
Advantage: Rapid o/p reduces time required to bring PV to
SP.
Disadvantage: Dramatically amplifies noise signals & can
cause cycling in fast process.

Answer / swatihendre

If D increased then output response will be fast and if D
decreased then output response will slow

can we control operation of PLC from operator station?

3 Answers  

---

The performance of a pump is monitored by measuring the ________ and _________ pressures

1 Answers  

---

What are the key components of control loop?

1 Answers  

---

what is difference between 3 wire and 4 wire RTD sensor?

12 Answers   HTA Instrumentation,

---

How hart protocol can be connected with control valves?

0 Answers  

---

How we are blocking 40 kg or more pressure through only 6 kg instrument air in control valve 

3 Answers  

---

WHAT IS TSI? HOW ITS WORK

2 Answers  

---

How to O2 analyzer works?

1 Answers  

---

Why mmwc unit is used?

0 Answers  

---

why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

19 Answers   Honeywell, TCS, TN,

---

In s7-200 we use HMI TD-200C , what that C stands for........ plz reply

2 Answers  

---

Can we place a Control Panel in Hazardous area Group IIC ? If 'yes' then is there any approval required? If 'yes' then there is any specific IP rating or any standard required? If 'Yes' What is MOC of control panel?

2 Answers  

---