IO-Device Communication Test Between S7-1200 and S7-1200 Using TIA Portal V16

[@dj1encore]

Jimmy, Thank you for the very clean explanation on connecting 2 plc's together. Is this better than the GET/PUT method ? and can you connect 3 or more PLC's together using this method or is it limited to 2 PLC's ?

[@jimmyplc7613]

Good Question. IO Device method is easier than the GET/PUT method. but, IO Device could spent process image(I/O address area). S7-1200 has 1 kbyte capacity of input and output address area. So, if you want connect many I/O address area(e.g Digital&Analog in-output) then you could not use many IO Device address . And, You can connect 3 or more PLC's together with IO Device method and GET/PUT method can connect 8 PLC's for S7-1200. :)

[@genantamtam9364]

@Jimmy PLC can i use the exact same method with same result on serial connection like profibus aswel? Another question is why do some use PN/PN coupler if a direct ethernet cable can be connected like in your example?

[@jimmyplc7613]

@@genantamtam9364 of course you can use it with Profibus. but s7-1200 has no Profibus DP interface. so, you have to put Profibus DP card(Master and Slave). And I don’t know why they use PN/PN coupler with same network.

[@genantamtam9364]

@@jimmyplc7613 thanks for the answer. New subscriber to your channel by the way, there is a hardware called PN/MF coupler and you can use that to communicate between siemens and Allenbradley systems, its easier than CIP, can you make a video about it?

[@alejandrocarballo869]

danke jimmy PLC