Hi friends, from Aug 4th onwards iam getting spikes for
analog inputs in our DCS for a period of 800ms. I throughly
checked every thing, finally i found that the DI, DO's from
MCC panels shields are terminated in the Signal Earth where
Analog Input signals shields are terminated. Is there any
problem with this type of termination?. i checked the
induction voltage from MCC and getting around 25VAC, please
suggest me in this concern. Our plant is 8months old only.
DCS is Siemens Make Simatic PCS7, and the transmitters are
Yokogawa make.
Answer / sankarithi
Hi Friends only problem is due to earth pit. I throughly
checked every thing, finally i found that the Earth pit
totally became dry. I serviced the pit,Now there is no
spikes.
Is This Answer Correct ? | 4 Yes | 1 No |
what is the safety integrity levels (SIL)
why ultra sonic level transmitter is installed in 90 degree?
How can corrosion alter the accuracy and precision of a C- Bourdon tube pressure gauge?
what is different between modbus and serial link? please could anybody give right answer.
How to check range of DP Transmitter
Please explain about FAT? What is the difference between FAT and SAT?
How to measure density of oil in your kitchen. i.e indirectly to verify the quality of oil using min. gadgets available in the kitchen/house.
modbus and profibus communication difference?
What is the relationship between GAIN and PROPORTIONAL BAND.
1 Answers Kharafi National, Sabic,
How flow control valve is working with pnuematic positioner and I/P convreter from command is given from remote
how to measure the output of RTD given the general formula of rtd.
What is the difference between radar and ultrasonic level transmitter? Which method is best and more accurate?