Hello all,

I am facing issues with using SysCom library. With SysCom23 library things were simple but since we are migrating to 64bit systems, I am writing a Porting program.

With SysCom23, opening the comport was as simple as providing the ComPort no. which returns the Handle as a DWORD.

dwHandle:=SysComOpen(Port);

But the new library is a bit different. It is asking for 2 input parameters to open the Com Port - Port Number and POINTER to RTS_IEC_RESULT

IF hCom = 0 THEN
                hCom := SysComOpen(ComSettings.sPort, ADR(pResult));

How should I use the RTS_IEC_Result? I can find RTS_IEC-REUSLT under SysType2Interfaces of SysCom library.

Also, can someone give me a general understanding of this RTS_IEC_REULT and RTS_IEC_HANDLE, etc.?

Link to library: https://content.helpme-codesys.com/en/libs/SysCom/Current/index.html

Update:

I was able to successfully use the SysCom.lib. I had to install SysTypes2Interface library as well and wrote following code.

Declaration

hCom : RTS_IEC_HANDLE; 
pResult : POINTER TO RTS_IEC_RESULT;

Implementation

hCom := SysComOpen(ComSettings.sPort, ADR(pResult));