Profibus DP is a multi-master system. Would it work on RS-485
4W or not, and justify your answer
- 1 Answers
- 9017 Views
- EIT, I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
The Profibus DP specification defines the hardware transport
physical layer as 2 wire RS-485. The communications
protocol and the transport layer are both part of the
Profibus DP specification (the separate 2 wire cable for
24Vdc power supply is not involved with the communications).
Any device that passes Profibus DP certification will
conform to the Profibus DP specification.
Therefore, a 4 wire RS-485 device will not work on a
Profibus DP network because it won't be a Profibus DP
device, it does not meet the Profibus DP spec, which is 2
wire RS-485.
Attempting to operate a 4 wire RS-485 device on a Profibus
DP network will only disrupt Profibus DP communications on
the network.
Carl Ellis
Measure First
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
What types of Instrumentation Related Questions can an Interviewer ask in a Telephonic Interview ?
HOW TO SOLVE PROBLEM WITH ENRAF LEVEL TRANSMITTER 854 ATG THAT PASSWARD DO NOT Exist INTO TRANSMITTER TO ADJUST LEVEL WITH PORTABLE PET 847, WRITTEN WRONG PASSWORD , I AM SURE THAT DEFAULT PASSWARD (W2=ENRAF2) IS THIS TRANSMITTER NEED TO REPLACE SOFTWARE AND HOW?
how to measure draft pressure in transmitter pl. give its single line digram
what will the sending unit in the fuel gauge utilizes?
Hi, Is there any smart plant instrumentation design training institute in Bangalore?
Make a ladder diagram on LSL valve will close, on PSL valve will open and start the motor
What is shielding effect?
Speedtronic system .
typical loop drawing of a simple feedback control comprising of one transmitter and one control
how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?
if my flow is 20000 m3/h than which range of DPT i have to use????
What is profibus?
we are having yokogawa centum cs3000 dcs in our power plant. i need some of the operator guides NOT to appear in HIS0163 AND HIS 0162 but it shoul appear in HIS0164 HOW TO DO IT?
Instrumentation Safe Guarding test. How to determine the interval time of the test. eg:Halfyearly,Every year,Every three years etc.
what can of fault ofently come in vibration mesurement?
