Answer / ashish gupta

There are 3 different modes of a PLC processor.
1. Program mode - In this mode the processor will not
execute the output even if all the inputs are healthy.
2. Run Mode - Normal Operation Mode
3. Remote Run -

I don't know what happens in 3rd mode if anyone knows
please post the answer.

Answer / sushil jambhulkar

3)Remote run - PLC run as per HMI OR PC interfacing with
it.

Answer / narendra mishra

Remote run mode allow user to switch between run and program mode remotely.

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6 Answers  

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3 Answers  

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Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

0 Answers  

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0 Answers   CCIE, Samsung,

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