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I got the Siemens protocol: FB1 (internal MODBUS), FB2(internal receive RS232), FB3(internal send RS232), DB13(internal MODBUS), DB17(bolc MODBUS used), DB18(bolc MODBUS receive), DB19 (bolc MODBUS send).
This protocol is running for one application wrote on C++. I need to rewrite this application under VB5. But first, I tried to write a simple source (VB5) using the control MScomm, but nothing work : I don't send/I don't receieve.
Do I need to use a special function or convertion to be able to set up the protocol MODBUS through VB5 ?
Anybody is welcome to give me some suggestions or maybe some sources (VB5).
Any information concerning the set up of the SIEMENS Modbus blocs FB, DB, will be so helpfull.
Thanks in advance.
Balou
This protocol is running for one application wrote on C++. I need to rewrite this application under VB5. But first, I tried to write a simple source (VB5) using the control MScomm, but nothing work : I don't send/I don't receieve.
Do I need to use a special function or convertion to be able to set up the protocol MODBUS through VB5 ?
Anybody is welcome to give me some suggestions or maybe some sources (VB5).
Any information concerning the set up of the SIEMENS Modbus blocs FB, DB, will be so helpfull.
Thanks in advance.
Balou