Problem with Array of Array

[Blackriv3r 0]

Hello i'm new in Omron plc programming and not very good in english! I have write this code in ST language but have 1 error in compiling it. This is the code: PLC CJ2M Data Types Prova [struct] Members of Prova Dog Bool [10] array of ten boolean bit Presente Bool Symbols Prova [3] Array of 3 elements. I create a new program Max:=3; (uint) Max2:= 10; (uint) FOR i :=1 TO Max BY 1 DO; Prova.Presente := TRUE; FOR j:= 1 TO Max2 BY 1 DO; Prova.Dog[j]= Prova.Presente AND j<10; END_FOR; END_FOR; I get this error Matrix Index not valid. Need some help, maybe indirect addressing?

[lostcontrol 23]

You may need to declare the pointers (i,j) as integers. From memory, you cannot use un-declared variables in ST in Omron

[ParaffinPower 13]

I think it's a limitation of cj2 in st. Pp

[lostcontrol 23]

Hmm, yep is looking like it, or perhaps even structures...?? Looks like you cannot indirectly access a sub-element of an array within a structure. A constant index does work into the sub-element though, but I suspect that will defeat the purpose. Without suggesting how to re-work your structures, not sure what you can do. I wonder if this can be clarified by Omron? My suspicion is that it is because it is a structure... Looks like it cannot even be done in ladder I have a way of doing this in ladder using IR/DR if you want an example?

[Blackriv3r 0]

I have a way of doing this in ladder using IR/DR if you want an example? Yeah can you post it? Thank you I wonder if this can be clarified by Omron? They post in this forum?

[lostcontrol 23]

There are members who work for Omron, they are more application specific, not the actual code writers, but can provide information sometimes that the rest of us cannot get...

[chelton 66]

This is on CX-Programmer help

[Blackriv3r 0]

Yes in this example the 2 condictions are "Prova.Presente := TRUE" and "Prova.Dog[j]= Prova.Presente AND j<10"; In real program the condiction Prova.Presente := TRUE and j<10 doesn't exists. Both are variable (int) from HMI. The cycle "for" must check if i have Prova [1] and then check if i have the Dogs in Prova [1]. Then check if i have Prova [2] and then Dogs. Example If i don't have Prova [2] the Dogs in Prova[2] are all False! Edited 2 Nov 2012 by Blackriv3r

[lostcontrol 23]

Example attached. I have used D1001-D1003 as 'Prova', with bits D100x.00/09 as Dogs & D100x.15 as Presente. If you need Presente to not be part of the same word let me know & I can change it. This way was nice & easy.. Arraytest.cxp

[Blackriv3r 0]

Thank you so much!!!!!!! Edited 5 Nov 2012 by Blackriv3r

[lostcontrol 23]

No problem, once you get the hang or IR/DR can do almost anything...

[Sleepy Wombat 27]

great work "lost control"..