Answer / bm

Modbus is a communication protocol.
Soft signals are taken through a link which maybe
RS232/RS485/Ethernet/Fibre Optic.

Answer / pradeebhap

mobdus is a simple, flexible and publicly available transmission protocol that allows exchange of analog and digital data between devices.

Explain the key components of control loop?

0 Answers  

---

what is reset windup in integral control?

6 Answers   Honeywell,

---

what is diffrance between FF & SMART, explain with difination

0 Answers   Bapco Bahrain Petroleum Company,

---

WHAT IS THE MASS FLOW FLOW METER

4 Answers   Reliance,

---

How DP Transmitter can be calibrated for crud application in floating roof tank?

2 Answers  

---

Briefly describe instrumentation job

1 Answers  

---

What is possitive and negative feedback?

3 Answers   KNPC,

---

What is first echo & echo window in radar type level transmitter?

0 Answers  

---

How does electro magnetic pump works ?

1 Answers   IGCAR,

---

A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

0 Answers   MNC,

---

SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.

0 Answers  

---

what is difference between HOT permit and cold permit

0 Answers   Petro Rabigh,

---