Answer / carl_ellis

It is very likely that the original question has not
correctly copied the error code.

"wran sensor 2" is most likely "WARN SENSOR 2"

It is impossible to search electronic pdf documents if the
error message is spelled incorrectly.

This is why employers look for things like misspellings in
documents submitted by job candidates, it shows whether the
candidate pays attention to details.

Here is what the 3144P manual says about the WARN error
message:

"The transmitter is still operating, but something is not
correct. Possible causes of this condition
include, but are not limited to, an out-of-range sensor, a
fixed loop, or an open sensor condition. In the
case of a Sensor 2 failure with Hot Backup enabled, the
Process Variable line displays “WARN,” and the
Process Variable Unit line alternates between “SNSR 2”
and “RANGE.” "

Carl Ellis
Measure First

Answer / parkash

we want to check the rtd or thermocouple connections which is connected to the transmitter.

Answer / marut.tripathi

no have answer.

For a diafhram 1.5 d =kn(p-p0) D4 Where d in deflection in inch k=constant n=no of capdule (P-P0)=Applied pressure in psi D In active dia at capsule. -1.5 d=k to p d being constant -1.5

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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.

0 Answers   MNC,

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What are the key components of control loop?

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