[RS-485 modbus rtu]

What does Write-IW , Write-IB mean?

[RS-485 modbus rtu]

I can't write a value to register 36401, although I can read it perfectly. I don't understand what I'm doing wrong. (function code for writing is 0x06)
What does Write-IW , Write-IB mean?

rs485.bmp

[SCADA control via phone]

I'm using the chrome web browser.

 

[SCADA control via phone]

Hello.  I can't change data via phone.  When I change the values on the computer, everything changes.  Help me solve the problem please.

[PLC state passive problem. PLC MAC 00:25:FC:01:5D:12 PASSIVE]

I connected the CPU and the SCADA computer to a router that has Internet access. Everything is working.

But unfortunately the server periodically goes into a passive state for a short time, then it works again.

Is it related only to the speed of the Internet or can there be other reasons?

Please help solve this problem, because sometimes when the server is in a passive state, the program stops and the current state of the PLC is reset (for example, if the output is on, it turns off, if the counter is running, it is reset to 0.

[PLC state passive problem. PLC MAC 00:25:FC:01:5D:12 PASSIVE]

I speak Turkish very poorly. But I hope for your help. I cannot connect the SCADA system to the GLC-496R PLC. After compiling the project, a message appears that PLC MAC 00:25:FC:01:5D:12 PASSIVE .