Inability to write without errors

[alpovo]

Hello Everyone
I have a problem that I've never had before but I've had recently. How can we solve it?
My problem is that I have a bool variable in DB100 at address 0.0, but I need to send true or false to this variable 3 times in order for it to be written to the PLC. This doesn't just happen with bool variables. It happens with all variables.

previously=

public Plc plc = new Plc(CpuType.S71200, "192.168.0.10", 0, 1);
bool tf=true;

public void Btn_Click()
{
    plc.Open();
    if(plc.IsConnected)
    {
         plc.Write("DB100.DBX0.0",tf);
    }
   plc.Close();
}

Now=

public Plc plc = new Plc(CpuType.S71200, "192.168.0.10", 0, 1);
bool tf=true;
public void Btn_Click()
{
    plc.Open();
    if(plc.IsConnected)
    {
         for ( int i=0;i<3;i++)
             plc.Write("DB100.DBX0.0",tf);
    }
   plc.Close();
}

What I'm trying to explain is that when I write expression #1 this way, it works fine. Recently, I had to write expression #2 at least three times to send the full value.

[ynioba]

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[gfoidl]

Please write in english, so "everyone" can read it w/o the need of a translator.

[alpovo]

Please write in english, so "everyone" can read it w/o the need of a translator.

Hello dear Tia portal DB100.DBX0.0 => Start

Other articles in English

[slenet]

I faced a rather similar issue. When writing several data fields to the plc, not all will be written.
The connection in general is ok, but plc.WriteBytes randomly fails sometimes.
I think it is a good idea to check the plc.LastErrorCode after each communication. And just repeat, when it failed. This never happens in my test-environment, only with the customers environment.