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Read SN or MAC address from PLC program

Created by: Kragic at: 9/5/2012 1:44 PM (19 Replies)

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9/12/2012 6:51 PM	Rate (0)
Kragic Posts: 18 Rating: (1)	In consultation with colleagues who are working on the project, we came to the following conclusion: Initially (through manual entry) will be entered the PLC MAC address in the database. Server over the network collects records from a data-log and along with MAC address formunique entries. When replacing the PLC (which is also only possible to perform by hand), we will register new MAC address in the data-base through manual entry. At the end, you always get a unique and unrepeatable records, which is the most important thing. Sometimes it is not necessary to raise the level of automation in order to obtain favorable results ...
Kragic Posts: 18 Rating: (1)
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4/30/2013 12:22 PM	Rate (1)
Jorsal Posts: 74 Rating: (31)	Hi hbrianjr, Thanks a lot for sharing this functionality with us! This was exatly what I wanted. I have been searching for af way to read out the Serial number of the CPU on a S7-1200 for so long, without any luck. I used to do it with SFC51 (RDSYSST) on S7-300/400, but all the SFCs is apparently gone on the new platform. Everyone I have asked at Siemens said that it wasn't possible to read out the serial number of the CPU from the user code, but this proves that it is! I have tested it myself and i works. How did you find the INDEX value 45040? And do you know of any other INDEX values that can read out something else? Do any of you for instance know how to read out the serial number of the memory card? I can see the ID=50 in System Constant under PLC tags, but can I rely on, that it always will be 50, no matter what hard ware config? I have tested with the different versions of S7-12xx CPUs and it seems to stay on ID=50 no matter what CPU i substitute with. Is this value user changeable?
Jorsal Posts: 74 Rating: (31)
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5/1/2013 10:02 PM	Rate (2)
Jorsal Posts: 74 Rating: (31)	Okay I found the answer by myself today by trial-and-error, so I thought I would share it with all of you in case any of you need to extract any of the information as well. Everything below is related to data from the RDREC (SFB52) To read the CPU Serial: ID=50, INDEX=45040, RECORD byte 28-44 To read the Memory card Serial: ID=51, INDEX=45040, RECORD byte 28-44 To read the MAC Address: ID=64, INDEX=45040, RECORD byte 20-25 I made a little routine, that checked for all combinations of INDEX codes, and only returned the ones that gave a result >0 in LEN. The results with the actual length are here: Name ID Index Len Readout (pseudo) PLC_1 50 45040 60 Order,CPU Serial, Firmware PLC_1 50 45041 60 00!00801 PLC_1 50 45042 22 00''00120100 PLC_1 50 45043 60 00#0080100 PLC_1 50 45044 60 00$00801 ? 51 45040 OrderMMC, 'SMC_422f62f304 ', version ? 51 45041-44 Like ID=50 ? 52 45040 45040-45044 is like ID=50 PN 64 32896 40 plcxb1d0ed...MAC-addr: byte 20-25 Port1 65 32810 44 01800108port_001 Port2 66 none found 1-65767 OB_Main 1 none found 1-65767 ? 0 none found 1-65767 So well, I found the answer for the original question (how to read the MAC address) in this thread as well as my own question during those tests. I found the different ID numbers under PLC Tags, System Constants. If you have additional modules attached, you will have additional ID numbers available. I figured out, that you could use quite a lot of the information for migration to S7-1200 in the S7-1500 section, even though it says it is only for 1500 (which obviously is misleading). Those links below documents quite a bit of the diffences and what to do with missing features (even though it doesn't have the exact answer I seeked regarding RDREC). The S7-1500 Migration section in the online help inside TIA is a quite good source as well. PLC migration to S7-1500 with STEP 7 (TIA Portal) V12 http://support.automation.siemens.com/WW/view/en/67858106 How in STEP 7 (TIA Portal) V12 do you migrate the call of the instruction "RDSYSST" (SFC51) from S7-300/400 to S7-1500? http://support.automation.siemens.com/WW/view/en/68397488
Jorsal Posts: 74 Rating: (31)
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This contribution was helpful to 5 thankful Users kbouwman Frederik 0_Einstein Gwawl Mootaz

5/15/2013 12:58 AM	Rate (0)
Jorsal Posts: 74 Rating: (31)	Regarding the I&M data, I just found this S7-1500 System manual, which describes the structure of the I&M data on the S7-1500 and how to read them out. They seem to be identical on S7-1200. http://support.automation.siemens.com/WW/view/en/59191792 See page 111 to 113
Jorsal Posts: 74 Rating: (31)
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10/24/2013 3:44 PM	Rate (0)
User! Experienced Member Joined: 7/11/2012 Last visit: 3/15/2023 Posts: 1 Rating: (0)	Hbrianjr, I reviewed the Profibus I&M document that you referenced. How did you determine that 45040 is the correct Index for the RDREC instruction? Anyone else able to determine this? Thank for your response.

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10/25/2013 7:34 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/24/2023 Posts: 13205 Rating: (2147)	User! Hbrianjr, I reviewed the Profibus I&M document that you referenced. How did you determine that 45040 is the correct Index for the RDREC instruction? Anyone else able to determine this? Thank for your response. 45040 = 0xAFF0 With that nugget of numeric wisdom, I think if you search for AFF0 in the 110 page range of the referenced downloadable PDF, you will see the index value pop out at you.
	science guy
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11/22/2013 8:54 PM	Rate (0)
Frederik Posts: 23 Rating: (1)	This does not seem to always work on S7-1500, see this thread for information on usingGet_IM_Data which is a new addition with V12 SP1 : /tf/WW/en/Posts/91820#501216 Fred
Frederik Posts: 23 Rating: (1)
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11/22/2013 10:01 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/24/2023 Posts: 13205 Rating: (2147)	Frederik This does not seem to always work on S7-1500, see this thread for information on usingGet_IM_Data which is a new addition with V12 SP1 : /tf/WW/en/Posts/91820#501216 Fred Good to know, but this is the s7-1200 conference, so I think for now, my post still seems accurate. I hope s7-1200 gets that Get_IM_Data instruction in a future firmware update.
	science guy
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5/23/2014 10:10 AM	Rate (0)
O_Moderator Diamond Member Joined: 4/24/2009 Last visit: 2/23/2023 Posts: 2685 Rating: (135)	New question splitted to Do you know some documentation with all value for parameter Index in function RDREC()? Best regards O_Moderator
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10/8/2014 3:52 PM	Rate (0)
Rossvik Advanced Member Joined: 12/2/2013 Last visit: 1/3/2021 Posts: 10 Rating: (3)	I know this is an old thread, but I had success when I changed INDEX:=W#16#8080 to INDEX:=32896 It turns out that INDEX is a DINT, and assigning a WORD did not work out well for me. (Note that INDEX:=W#16#8080 came from a Siemens example project for S7-1500) ID:=64 which is the "PROFINET_interface_1"

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