We have a Modbus mapping list for a flow computer .
We have a Modbus mapping list for a flow computer .it has the data type double. How can I read data from a flow computer to software control builder ABB?
Asked 4 months ago
Answers
0
Hi,
Read each the consequent registers as INT. Convert each of them INT_TO_WORD and then use WORDS_TO_REAL,
Depends on the modbus, you can read directly 2 consequent WORD and then WORDS_TO_REAL.
You may need to play with big_endian parameter of words_to_real
Read each the consequent registers as INT. Convert each of them INT_TO_WORD and then use WORDS_TO_REAL,
Depends on the modbus, you can read directly 2 consequent WORD and then WORDS_TO_REAL.
You may need to play with big_endian parameter of words_to_real
0
Hi,
For reading the Register address for double data type, Need to read the Individual register from 400,401,402,403 and combine the all the register address values using the IEEE conversion block to get the real value of the signal.
For reading the Register address for double data type, Need to read the Individual register from 400,401,402,403 and combine the all the register address values using the IEEE conversion block to get the real value of the signal.
Answered 4 months ago
0
Read all four registers - For example, to get the value of signal "Uncorrected volume flow rate", read all four registers from 100, 101, 102 & 103.
Refer below link for the conversion of 4 dint values into real,
https://forum-controlsystems.abb.com/...
Refer below link for the conversion of 4 dint values into real,
https://forum-controlsystems.abb.com/...
Answered 4 months ago
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