Answer / d das

A programmable logic controller (PLC) or programmable
controller is a digital computer used for automation of
electromechanical processes, such as control of machinery
on factory assembly lines, amusement rides, or light
fixtures. PLCs are used in many industries and machines.
Unlike general-purpose computers, the PLC is designed for
multiple inputs and output arrangements, extended
temperature ranges, immunity to electrical noise, and
resistance to vibration and impact. Programs to control
machine operation are typically stored in battery-backed-up
or non-volatile memory. A PLC is an example of a hard real
time system since output results must be produced in
response to input conditions within a limited time,
otherwise unintended operation will result.

Pls can anybody tell me how much memory plc's has?in byte or in Kb

2 Answers  

---

what is the best method to measuring level in high pressure and temperture thank?

4 Answers  

---

what is PM/CM/RCM?

2 Answers   Emco,

---

why we use by pas on a positioner? When can a by pass be not used on a positioner ?

2 Answers  

---

What is the solution if rotork motorised control valve showing pink Colour in dcs.

3 Answers   Bhushan Power Steel,

---

---

what is absolute pressure and where use in process?

3 Answers  

---

Is there any temperature compenasation for the air flow from FD fan & SA fans which supplies air to the Boiler?

2 Answers  

---

Can anyone explain about ELectropneumatics principle?

1 Answers   Forbes Marshall, Step,

---

what is difference between HART communication and BRAIN communication?

1 Answers   Delta Controls,

---

1.In which princeple DP transmeter works? 2.Why UPS system is use for DCS? 3.How drum lvel controller works? 4.What is the difference between glob valve and gate valve? 5.How axial shift probe work & in which princeple it works?

1 Answers   Luberef, Qatar Gas, Reliance,

---

how do u calibrate the vacuum transmitter if it shows more reading

0 Answers  

---

hi vishok this is noor plz tell me what type problems will occured i use T/C in the place of RTD in (FEED WATER TANK),plz send ur e-mail address to my ID (mail2noor.hyd@gmail.com)

6 Answers  

---