purpose of a signalling system

Voltage Scaling on Oscilloscope

Time scaling

Picture is required here from oscilloscope

Triggering Function

Picture is required here from oscilloscope

Cursor function

Picture is required here from oscilloscope

Time Scaling on Oscilloscope

and function generator to triangular wave

Explain with suitable diagram how n-type semiconductor can be obtained from intrinsic silicon

Discuss the advantages and disadvantages of IC assembly-based wirebond interconnections versus flip chip interconnections.

Define/explain intrinsic semiconductor. What are its characteristics

The inner and outer diameter of a single core cable are 3 cm and 8.5 cm The insulated with two materials having relative permittivity of 5 and 3.5 respectively with corresponding maximum electric stresses of 35 kV/cm and 25 kV/cm. Draw the configuration and calculate:
a) the radial thickness of each insulating layer.
b) the safe working voltage of the cable.
c) draw the voltage and electric stress as a function of radial distance from center to metal sheath.

arduino firmware coding for bidirectional closed loop buck boost converter pwm signal

Describe the information/data exchanges for Fieldbus Systems on device and control level as well as examples of network/communication protocols used.

Describe the main approaches that was followed in designing the SCADA software system and the new approach for current systems

Plot the radiation pattern of loop antenna with the circumference approximately equals to ?, operating at 1 GHz frequency.

Question: How to delay this code from 1 second delay to 0.5 second delay?

org 0000h;

ljmp main;

org 0050h;

main:

     mov dptr,#SMG_DUAN ;

    mov r0,#00h;

    mov r1,#0ah;

lin1:mov a,r0;

    movc a,@a+dptr; get first indexed data in rom to accumolator a

    mov p1,a; move data in a to port 1

    lcall delay; subroutine call for the delay

    inc r0; increase r0 by one to get to the next index

    djnz r1,lin1; repeat the above instructions till we get all the data

    sjmp main;

delay:

mov r3,#0fh; move 0fh to regester 3

lin2: mov r4,#0ffh; mov 0ff to reginster 4

lin3: mov r5,#0ffh; move 0ff to register 5

djnz r5,$; decrease r5 till it equal to 0

djnz r4,lin3; decrease r4 till it equal to 0

djnz r3,lin2; decrease r3 till it equal to 0

ret

org 0200h

SMG_DUAN: ; rom memeory

   db 0c0h,0f9h,0a4h,0b0h,99h,92H,82h,0f8h;

   db 80h,90h,88h,7ch,39h,5eh,79h,71h;

   end

 

Consider the following inputs and outputs associated with a DCS system. It is interesting to note that EXACTLY the same could be applicable to a SCADA system (although the SCADA system could use either a dedicated RTU or else a PLC).

Break the following signals up (either going to, or away from the RTU-type devices) and indicate which are:

i) digital inputs, ii) digital outputs, iii) analog inputs and iv) analog outputs:

18.1 ( 1 mark) START signal

18.2 ( 1 mark)

Speed control signal of a VSD (going to the VSD – Please think in terms of a SPEED UP button and a SLOW DOWN button).

18.3( 1 mark) An I/P (current to pressure) transducer for a butterfly valve (going to the valve).

18.4( 1 mark) Solenoid Valve (operating something in the field).

18.5( 1 mark) A light.

18.6( 1 mark) An electric motor’s contactor (which will be used to start a motor in the field)

18.7( 1 mark) An RTD temperature probe.

Note – This question is mandatory. It should be answered and students are expected to get this question completely right to be assessed as competent with a score for this module.

List nine general firewall policies?

 

Describe the purposes within the organization for data collection by the SCADA historian