mechatronic_hieu

You need to have extenal profibus CP If your PLC does not support integrated one

You need to set "size of the process -image input area" in your HW configuration. Your input address should be inside the range what you put in HW conf.

hi dan Try to send your CV to Danieli company, it has a branch in your country. They need people like you http://www.danieli.com/en/_1.htm

The best way, you install it on virtual machine

You need to install a virtual PLC on your compter: PLC-sim or WINAC RTX.

Note that you can note change the address name in instance DB without open FB. The name does not get update automatically, hence you need to open FB or FC to change the synbol name inside and download to PLC

what does it mean? How was your original HW config? You mean the system is having PLC S7-300 and some devices that connecting via Profibus? And now it's only CPU?

Check the bus connection and interface modules in the distributed I/O. Try to replace also the cable that connect from PLC to IM module if it is exsing in your system. In the order hand, you try to code in OB122 to detect and store error from incoming local data.

Pls describe more information (type of humidity sensor) in order to people help you, for analog type you need ADC module. Anw, there are usually 3 pins of original humidity sensor: GND,5V and DATA, base on its data sheet, you will know how capacity and frequency of data of this sensor to handling the signals in your program

when you change the address name without download to PLC, its only affect in your offline project, the program in your PLC is nothing change. You can only download the function without PLC fault because PLC just care the physical address of DBs. In case you only change name of address, you dont need to download anything to PLC, you can go online function block but Data block is impossible. Be careful if you download DB, the actual value in DB will be lost and may the machine or sequence stop. Hope this helps

Your steps seem be correct, but you can not use runtime mode without WinCC flexible on your PC. yes, it is posssible

I think you can update the firmware with mmc card, without plc conection

Try to understand the theory of straightline with two foreseen interpolate by this link, https://support.automation.siemens.com/WW/llisapi.dll/8803015?func=ll&objId=8803015&objAction=csView&nodeid4=20229587〈=en&siteid=cseus&aktprim=4&extranet=standard&viewreg=WW&load=content&csSort=-DOCBETREFF Hope you will be clear!

How was your plc's situation now, the problem have been sloved? Firmware update maybe fix your trouble.

SMC is a best choice for you. it will be help you connecting to many kinds of PLC (Siemen, AB..)