Interested to Buy Any Domain ? << Click Here >> for more details...
Im working in a shopping center, it is also hotel and office building, two towers exactly and someone is proposing a PLC control for the HVAC system, but Im thinking of a DDC control system. in this case what is the difference between PLC and DDC control?
- 1 Answers
- 2724 Views
- I also Faced
- E-Mail Answers
Answer Posted / prateek pathak
DDC stands for Direct Digital Controller. It can be called a PLC based system and it is recommended for HVAC systems. DDC keeps a centralized approach and all digital and analog controllers are placed under it.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
how to tune siemens sipart electro pneumatic positioner..plz tel me..
1)How many tpes of vibration probe and how many tpyes of vibration. 2)how we can calibrate a vibration probe with tk3 3)what is RMS value in vibration measuring application and how we calculate it.
How to Calibrate Temperature Switch in field
How to calibrate Magnetic flow Transmitter in Field
what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ?
What are the maximum packet size of: a) HART b) Profibus DP c)Profibus PA d) DeviceNet e) Foundation Fieldbus
give me all the details about the interview and which type of question being asked
If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?
What is difference between radial vibration and axial vibration explain in detail .
we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.
which type of zones used for boiler? & why ?
what is gas metering system? gas chromatograph? and gas compressors?
i want formula for flow control.am doing project in flow control using orifice . i know value of the flow level(Q) . upstream(p1) pressure, orifice diameter(Do) , pipe diameter(Di) and oil viscosity(Vi) how can i calculate downstream pressure
Senior engineer's please help me, what is Loop Checking and Loop test? and write difference also? soon urgent
We are using Rosemount 5400 series Radar Level Transmitters in all types of Sump Applications having oily water hdrocarbon petrochemical nature. What we are facing the problem frequently is that always getting reading frezzed at some value. If we do power recycling , sometimes it is working . then making same freezing problem. If anybody faced before such type of problem and also having solution , Please give the answer.
