tomrobot11
Member
Hi
I am trying to setup a PROFIBUS DP connection between a Siemens S7-314C-2DP plc and a Siemens Multipanel MP270B. The PLC and touch panel are the only two things on the profibus DP network so i got a profibus cable made up with the terminating ends (with looping resistor or something like that)
I´m using SIMATIC Manager to create the project, i have configured the Hardware, and the Network using Netpro, in the SIMATIC Manager. I´m connected the CPU with the PC using an MPI interface and it works good,there is no problem with that. The problem is with my PROFIBUS DP Subnet, i have configured it and when i save and compile it, the SIMATIC doesn´t show me any errors. Then i load all the project to the PLC,but when i try to send data to the PLC using a button in the MP270B there is no change in the output.
I have configured the DP port of the PLC using the PLC as a Master and i have unchecked the option "Only master in the bus" in the WinCC connection configuration, so i suppose in that way i am using MP270B as slave.
I was wondering if also to to this, i need to load the SFC´s Function Blocks corresponding to DP Profibus (SFC12,SFC13,SFC58-59,etc) in my S7-300 program. Is this necessary when i am tryng to establish connection with a MP270B using Profibus DP?...or Are the functions only used in Profibus DP communication between PLC´s?
I have never done a profibus connection before and i am wondering, If i am right or what settings do i need to set in order for the two devices to communicate over profibus DP ?
Thanks for any help, and i am sorry for my profibus "newbie" type question.
Tom Van der Krotmann
I am trying to setup a PROFIBUS DP connection between a Siemens S7-314C-2DP plc and a Siemens Multipanel MP270B. The PLC and touch panel are the only two things on the profibus DP network so i got a profibus cable made up with the terminating ends (with looping resistor or something like that)
I´m using SIMATIC Manager to create the project, i have configured the Hardware, and the Network using Netpro, in the SIMATIC Manager. I´m connected the CPU with the PC using an MPI interface and it works good,there is no problem with that. The problem is with my PROFIBUS DP Subnet, i have configured it and when i save and compile it, the SIMATIC doesn´t show me any errors. Then i load all the project to the PLC,but when i try to send data to the PLC using a button in the MP270B there is no change in the output.
I have configured the DP port of the PLC using the PLC as a Master and i have unchecked the option "Only master in the bus" in the WinCC connection configuration, so i suppose in that way i am using MP270B as slave.
I was wondering if also to to this, i need to load the SFC´s Function Blocks corresponding to DP Profibus (SFC12,SFC13,SFC58-59,etc) in my S7-300 program. Is this necessary when i am tryng to establish connection with a MP270B using Profibus DP?...or Are the functions only used in Profibus DP communication between PLC´s?
I have never done a profibus connection before and i am wondering, If i am right or what settings do i need to set in order for the two devices to communicate over profibus DP ?
Thanks for any help, and i am sorry for my profibus "newbie" type question.
Tom Van der Krotmann