what is the difference between RS 232,RS 485,RS 422, how
they different from each other
Answer Posted / dattatray naikwade
Differential signal voltage level is 0.2V for RS 485 where
as it is +/-3V for RS232.
Is This Answer Correct ? | 25 Yes | 21 No |
Post New Answer View All Answers
A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.
Reason for capillary type dp level transmitter fluctuation
What are different types of orifice plates? State their uses.
hii my name is sujith...i am preparing for HPVL GET 2010... so ,,,pls help me by send any previous questions or material to my site.....(Msujith_12@in.com) thank q
How process line mpm calculation is done?
what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.
how the arrangement of equipments done in control room
what is temperature compensation?
Difference between dcs and plc including date processing and architecture.
what is output of FOUNDATION FIELD BUS transmitter
what is a vortex flow meter,mass flow meter and electromagnetic flow meter.particular use of this.means in which condition particular meter is used.
How is work 5/2 sov?
What are the charcterstics of a P&ID controller block for Governor speed raise or lower for a load sharing functionality between 4 Gas turbines in droop mode.
my data card only does run in my mobile so how can change it that it run other mobile & computer and i can stor data in my data card
why we use 3 wire rtd direct wiring for temperature measurement instead of temperature transmitter like bearing temperature