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  

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what is maximum vaccume?

4 Answers  

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we are having yokogawa centum cs3000 dcs in our power plant. i need some of the operator guides NOT to appear in HIS0163 AND HIS 0162 but it shoul appear in HIS0164 HOW TO DO IT?

0 Answers   Yokogawa,

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How flow control valve is working with pnuematic positioner and I/P convreter from command is given from remote

1 Answers   Ecil, GAIL,

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selection criteria of control valve? and selection criteria of actuator explain in brief?

0 Answers  

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what is the difference between DELTA-V & FOUNDATION FIELD BUS

4 Answers  

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what's the criteria of using over range protector when installing Pressure Gauge

1 Answers  

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can anyone can let me know in Eurotron Micro cal 2+ calibrator in milli amps source mode we are not able to get 20 milli amps output it only produces 1.52 milli amps out, but display shows increase in milli amps , and err6 displays, let me know how to remove the err 6.

0 Answers  

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how can we caliberate interface level troll

2 Answers   Grasim, IOCL, KOC, Sankyu,

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send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com

0 Answers   HPCL,

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how can i calibrate the temperatuture gauge used by temperature bath(dry block) i mean step by step procedure?

0 Answers   Texas,

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Explain about signal isolator

1 Answers   TCS,

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