Hi,friends

In our preject, we need to connect one s7-315 2DP/PN with several s7-1215c PLCs to form a DP network.

can somebody tell us in this project how many s7-1215c PLCs(slave) can be connected to one s7-315 2DP/PN(master).

huhank

Hi,friends

In our preject, we need to connect one s7-315 2DP/PN with several s7-1215c PLCs to form a DP network.    

can somebody tell us in this project how many s7-1215c PLCs(slave) can be connected to one s7-315 2DP/PN(master).

 Hi Huhank,

According to my knowledge I think the maximum you can go upto 124 but also remember that you will require to have repeater for extending the nodes more then 32 so Profibus network with one master and 124 slaves will require at least 4 repeaters

For more details refer

Max No. of PROFIBUS DP Slaves Connected to S7-300 CPU

huhank

Hi,friends

In our preject, we need to connect one s7-315 2DP/PN with several s7-1215c PLCs to form a DP network.    

can somebody tell us in this project how many s7-1215c PLCs(slave) can be connected to one s7-315 2DP/PN(master).

 Hello huhank,

 Why Profibus? You have 315 CPU PN/DP, and S7 1200 have integrated Profinet port if you want Profibus connection with S7 300 you have to buy CM 1242-5 expansion, look the example below in Profinet, the maximum connection are 14 see Chapter 2: 

https://cache.industry.siemens.com/dl/files/214/40556214/att_9239/v1/40556214_ce-x18a_s7-com_v1d2_en.pdf

and

 http://support.automation.siemens.com/WW/view/en/40556214