Originally created by: tw0face

hello

im a new into all this kind of stuff so ill try to explain my problem the best i can. we have a few wago modules so far. and we are developing our own application to work with it.

our goal is to be able to read anything from the wago itself. i managed to get working the jamod library, so now i can read/write digital/analog registers. this is very good, but what is more, i need to be able to also read (somehow, anyhow) the variables of program running in wago. meaning, that i made a program in codesys, that's measuring temperature for example. i put this value into some retain variable, but dont put it on some register.

my question is, how can i read the variable in retain memory, i think its a different type of memory then the one u can address like %IX2.0 etc..

as well as any other type of memory thats included in wago modules..

im sure there is a way how u can do this, because codesys itself reads the variable for example from retain memory when u open the program, connect to wago and run it..

well..i hope i made sense

please i really need your help!

thanx in advance!

Hello tw0face,

i don’t know the jamod library but i think you use modbus TCP.

With modbus you have access for some memory areas.

If you want to get a variable from the plc then you have to place this variable at

a defined memory address.

Example

VAR

speed AT%MW0 : INT;

temp AT%MW1 : INT:

END_VAR

Note :

You have to administrate the used addresses by yourself and

you have to pay attention for the wordalignment.

With your jamod library you have access to the %M area from address 12288 (0x3000) up to

16383 (0x3FFF) means %MW0 …%MW4095

For more information see the follow link

http://www.wago.com/wagoweb/documentation/app_note/a3000/a300003e.pdf

Uwe

Originally created by: tw0face

awsome thanx for ur reply it helped alot, now i can define variable in that memory, put anything i need there and read it with jamod

u made my day

thanx again!