TCP Driver device field delimiter

Ignition
1

Hi,

I am implemating a Bilanciai weighbridge serial 232 port using a Moxa Nport serial converter for TCP/IP.

The table bellow is the string that the divice send.

Column 1 Column 2 Column 3 Column 4
1st character $(24H) string start character
2nd – 10th character net weight with sign and decimal point (if present)
11th character (20H) space
12th – 20th character tare with sign and decimal point (if present)
21st character (20H) space
22nd – 23rd unit of measurement
24th character (20H) space
25th character scale status
26th character scale status
27th character scale status
28th character scale status
29th character (0DH)
30th character (0AH)

I have the "$" in the message delimiter and 4 field count. Now is just missing the field delimiter but look that i can´t insert a "space" in this field. Is it possible to sue a space as a field delimiter?

Regards

2

Consider using CRLF as your field message delimiter, and accept the entire string as the value. In an OPC tag linked to the message buffer, find the offset of the $ character, and use string slicing from there to extract the fields by position.

1 Like
3

Using \s for the field delimiter may work... you'll have to try it and see.

4

Is working with 20 fields and 0 kg. the data appears at field 8, 17, 18 and 19.
8 shows the net weight
17 show tare
18 unit of measurement
19 the 4 scale status
If the kg change the fields get broken.

5

Space delimiters won't work if the weight fields are padded with spaces.

Use my advice above.

2 Likes