concatenate strings for caption in list selector

[mrgees100peas]

Hi,
I have a list selector which I want to display the recipe found inside a plc-5. The recipe is store in an ascii table with each character put in a different address. So A80:150 is the 1st character, A80:151 is the 2nd character for that recipe and so on.
What I've been able to do is concatenate them like this
/*S:0 {::[LineJ_Cartoner]A80:150}*//*S:0 {::[LineJ_Cartoner]A80:151}*/
all of that for just 2 characters. each recipe has at least 7 characters and there are 60 of them so you can imagine how much work it would be to do that for every entry. Is there a another way to tell the system use A80:150 thru A80:157?

 

[drbitboy]

Does PLC allow an indirect addressing syntax like A80:[offset], where offset is an integer? Then you could

• initialize the output string to an empty string and offset to 150
• concatenate A80:[offset] to the output string on each scan
• increment offset by 1 for each scan
• when offset increments to 158
  • store the concatenated string result
  • return to the initialization step

 

[Mispeld]

There are some examples in this thread that may be useful:

PLC5 and Factory talk view studio 7

 

[mrgees100peas]

The solution per the article was to add ,LX where X is th number of positions you want. like this

{[LineJ_Cartoner]A80:150,L10}

In the example above I got the data from A80:150 to A80:159. However doing something like {[LineJ_Cartoner]A80:150,L20} did not give me the data from A80:160 which I found odd but whatever. We'll cross that bridge if we ever need to.

 

[MikeyN]

It isn't really odd at all, you got the exact data you asked for. Since you asked for 20 bytes (characters) and there are 2 bytes per word, the request should return 10 words. Remember to start counting at A80:150 since it returns the first two bytes. 20 bytes later you end at A80:159. To go even deeper to the bit level, this should return 320 bits of data. Starting at A80:150/0, this will take you all the way to A80:159/15. If you need A80:160, simply amend the L20 to L22 to get the next two bytes.