Separate S7 RS485 string

[DLMUK]

Hi all,

I have an ASCII RS485 string going into a CP340 and into an S7314.

I have the string going into the PLC ok... what I want to do is separate out data from within the string.

Can anyone point me to a good starting point? I have had a scout online but cannot find anything relevant.

An example is:

T+12.55A-15.55

I need to separate out the +12.55 and the -15.55 into separate data areas.

But my string coming in (when looking at the online view in TIA portal) doesn't seem to deal with LF very well. So sometimes it would be

T+12.55A-15.55[][]T+12.55A-15.55[][]T+12.55A-15.55[][]

then another time

12.55A-15.55[][]T+12.55A-15.55[][]T+12.55A-15.55[][]

this is during constant operation, not me starting and stopping the input.

So I will also need to identify the characters T and A (coincidental combination of letters!!) and then take the data which appears after these characters occur.

Many thanks,

Thanks,

 

[DLMUK]

FYI for people who may wish to do this, I got it running in the end using the following SCL

This looks at the raw RS485 data in...

e.g. P+012.55R-015.99

and assigns the value after the P to the variable #Inc_St



#P_Pos := FIND(IN1 := #RS485, IN2 := #Inc_Char); //Assigns the value (#Inc_Char) from the RS485 string to the tag #P_Pos

#Inc_Temp := MID(IN := #RS485, L := 7, P := #P_Pos); //Assigns the data for a length of 7, starting at #P_Pos to the tag Inc_Temp

#Inc_St := DELETE(IN := #Inc_Temp, L := 2, P := 1); //Deletes the first charcter of #Inc_temp and assigns the remainder to #Inc