open file in simulation mode

2020-02-27T14:40:23.095000Z

Mikhail Shvetsov hat geschrieben:
If i understood you correctly....

Hello my friend. I've a question, i hope you can help me please, in advance apologize the inconvenience...
i try to connecting my PLC easyHMI MFD4 to a sensor with a Ethernet interface but, i'm using syslibsocket library, not possible.. can you help me to do? first i connect my plc with a java application make for me, the program java it's fine. i can do connect, but i can not write or read data from PLC. if i can to do that, i can do it between PLC and Sensor... Thank you!.

Servidor means SERVER, CONECTAR: connect, esperando conexion: waiting for connection, conexion 1 recibida de: connection 1 recieve from

open file in simulation mode

2020-02-27T14:40:22.589000Z

Originally created by: Mikhail Shvetsov

ventas3 hat geschrieben:
Muchisimas Gracias a todos!... Thank you very much for your help...!..

Да всегда пожалуйста - it means - You are always welcome!

open file in simulation mode

2020-02-27T14:40:21.185000Z

[quote= It works well [/quote]

Muchisimas Gracias a todos!... Thank you very much for your help...! I discovered that the problem I had was when the file name. Should be done according to the specified path when you enter the command files..! ie OpenFile1: = SysFileOpen ('\ disk_sys \ project \ File1', 'r ');

open file in simulation mode

2020-02-27T14:40:20.682000Z

Originally created by: Mikhail Shvetsov

ventas3 hat geschrieben:
excuse me but, if i use OPC server it's not easier? the example in russ is so good!. but, does not work...

All examples were checked out many times by a lot of peoples. Just believe me, i know it:) Theres a lot of peculiarities which isn't showed on figures but explained in text, and you probably miss them. But you can ask me about problem with it.I'll reply.

i attached very simple project (special for you from Russia with love ). This one is written for PLCWinNT. Start the program and change "Start" variable to TRUE.
It write the string WriteBuffer into file on drive "D" (you should fix it if you don't have drive D) and read it to string ReadBuffer.

It works well

WriteReadFile.pro [32.43 KiB]

open file in simulation mode

2020-02-27T14:40:20.190000Z

Hi
As usual, SysLibs do not work in Simulation mode.
There is no Hardware selected, so there are no SysLibs...

Erik

open file in simulation mode

2020-02-27T14:40:18.759000Z

Thanks for your code. I wonder if the error is due to the way I'm stating the name of the file, because I am stating this: strFileName: STRING (255): = 'c: / data / mylog.txt', the results from strDataBuffer is 0 I think it can be because I'm in simulation mode and I understand that you can have conflicts, have you any idea how to see the results? The PLC I'm using is a MFD4-5-XRC-30. If only work connected with the PC or does will lack the MMC?

strFileName: STRING (255): = 'c: / data / mylog.txt';

the results are:

open file in simulation mode

2020-02-27T14:40:18.212000Z

Try this:

FUNCTION_BLOCK WriteValueToFile_FB
VAR_INPUT
strFileName: STRING(255);
strDataBuffer: STRING(255);
END_VAR
VAR_OUTPUT
bDone: BOOL;
bError: BOOL;
wErrorID: WORD;
END_VAR
VAR
dwBytesWritten: DWORD;
dwFileWrite: DWORD := 0;
END_VAR

dwFileWrite := SysFileOpen(FileName:=strFileName, Mode:='a');

IF dwFileWrite = 0 THEN (error: file couldn't be opened )
bError := TRUE;
wErrorID := 1;
RETURN;
END_IF

dwBytesWritten := SysFileWrite(File:=dwFileWrite, Buffer:=ADR(strDataBuffer), Size:=LEN(strDataBuffer));

IF dwBytesWritten = LEN(strDataBuffer) THEN
bDone := TRUE;
SysFileClose(dwFileWrite);
dwFileWrite := 0;
ELSE
bDone := FALSE;
SysFileClose(dwFileWrite);
dwFileWrite := 0;
END_IF

open file in simulation mode

2020-02-27T14:40:17.635000Z

I really want to get the value from a global variable of codesys, then to safe that values into a .txt file; but i don't know if using OPC would be easier for that, that was my question about OPC. but, please if you can help me to make that, i will be thankful.

open file in simulation mode

2020-02-27T14:40:16.037000Z

What do you want ?
Write into a .txt, or use OPC ?
Thats 2 different things...
Writing in a file is very easy.

Erik

open file in simulation mode

2020-02-27T14:40:15.537000Z

excuse me but, if i use OPC server it's not easier? the example in russ is so good!. but, does not work...

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