3/29/2010 6:36 PM | |
Joined: 3/25/2008 Last visit: 1/28/2022 Posts: 232 Rating: (20) |
Hello dear colleagues. I'm comissioning a new profibus network in wich we have to use a CP324-5as DP master; in this new network we have several devices each one are using8 bytes of inputs and8 bytes of outputs; however we have to have separated I/O addresess because of future or sparedevices; for example the device #1 will be asigned to PIW1000 to PIW1009/PQW1000 to PQW1009; device #2 will be asigned to PIW1100 to PIW1109/PQW1100 to PQW1109; device #3 will be asigned to PIW1120 to PIW1129/PQW1120 to PQW1129... and so on. For get the data in the PLC we will create a DB1 for inputs and DB2 for outputs, and we will use FC1 "DP_Send" and FC2 "DP_Recv". The question is, how do we have to structure the DB1 and 2 if we have those "empty" spaces in I/O memory areas? Please find attached picture in wich the HW Config is showed. Any advise or tip will be very helpfull; thanks all you for your help and have a nice day. AttachmentActual_HW_Config.pdf (150 Downloads) |
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3/30/2010 3:01 AM | |
Joined: 10/7/2005 Last visit: 9/23/2024 Posts: 3021 Rating: (1054)
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HelloTEBANCH below is an FAQ which quite nicely explains what to look out forin your case. Have especially a good look at section 5 which details the I/O area and DB usage and will hopefully answer your questions (you configuration will be workablethough as long as you do NOT exceed I/O address 2160). What should you watch out for when configuring a CP342-5 as DP master? For completeness, you may find these related FAQ's useful too: What are the differences between an integrated DP interface of my CPU (e.g. CPU 315-2 DP) and the DP interface of the CP 342-5? CP 342-5 -- Why does my CP 342-5, operating as a DP master or DP slave, not switch to data transfer, even though the CPU is in RUN mode? CP 342-5 -- Why does the SF LED blink on the CP 342-5 as DP master when you have configured an S7 slave (e.g. IM 153-2) as DP slave? CP 342-5 -- In STATUS, why do I get the return value 8090h (module with this address not available) from my FCs for DP? CP 342-5 -- How do you recognize the failure of a DP slave operating on CP342-5? I hope this helps |
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