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I have an assignment at work, to get information from Jenbacher generator and show values in new SCADA system. It has a B&R CP260 PLC with RS232 port and RS232 to RS485 converter. Currently it’s connected to old Winows XP PC via COM port. From hardware settings on PC I can see that it uses 9600 baud 8N1. It sends data packets every 5 seconds (without request). There is about 30 different variables that are shown in the old SCADA system (a lot of BOOLs and about 8 analog values. The whole system is 15 years old. I used RealTerm to read 10 packages in HEX and I got some data.

I wrote down active power from screen with every packet received and I have some variables that are not changing so often (didn’t change while reading packets) :

Operating hours – 81521

Total active power – 80578,3

Total reactive power – 1053,5

Active power from screen whit each packet received:

1) 852 kW

2) 853 kW

3) 843 kW

4) 840 kW

5) 851 kW

6) 856 kW

7) 848 kW

8) 841 kW

9) 848 kW

10) 852 kW

Active power is changing on screen with every packet received, so it must be sending power updates with every packet, but I can’t find it in the packet. I found Op hours, total active, reactive power in some packets, but it is not consistent.

Update:

Discovered values in bold :

13E71 - OP hours

C4B97 - Tot. active power

2927 - Tot. reactive power

Data:


1)
FF01020810408000000001040820400000000104082040000000010000010408A060AA15B8010208
10408000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204040AA03490308DB405360010428
3052000004420102081040BF2101F404F0056B0A10406024023F09C3265891608D022D09534D5869
6021024A024E09034D5869601B0248091B4DD89A602460A3024E016268D239800029270D8A0D5060
16020850630C20400000000114CC1440800000000114AC2040000000010408204000000A7100CC00
C80154018D055B2A58D440D6FF8C0391234CAB2022C1F600860024012A03A105B60D2040000006A1
01040820400000000104082040000000010408204000000001040820400000000104082040000000
01040820400000000104082040000000010408204000000001040820400000000104082040000000
0104082040000000010408204000000001040820400000000104082040000000ED

2)

FF01020810408000000001040820400000000104082040000000010000010408A060AA15B8010208
10408000000001040820400000000104082040000000010408204000000001F40104082040000000
01040820400000000104082040000000010408204000000001040820400000000104082040000000
010408204000000001040820400000000104082040000000FD0134A8A540A900D003BD0AEC010428
3052000004420102081040BF2201F404D1056B0A104060D202400239097324183360170248094B4D
984860D2024E09FB24589A602360D202430250093B499834602700182DBA0E1040CA270341022898
16020850630C20400000000114CC14408000000001142C3040000000010408204000000A75016400
CA00CA018D055B2A58D440D5FF880DFA899859811304DB00430091012A03E8014B0000000003E800
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000FB

3)

FF00000000000000000000000000000000000000000080010000000001148CB53157000000010408
20400000000104082040000000010408204000000001040820400000FE0104082040000000010408
20400000000104082040000000010408204000000001040820400000000104082040000000010408
204000000001040820400000000104082040000000FD013468D2406A006703BD0AEC010428305200
0004420102081040BF2001F404CD018E010248586960900239097324582360170247094B4D984860
D2024E09FB24589A602360D20243024F024709334D981240834B970000A57634503580C03E710102
28EC0C20400000000114AC1440800000000104880104082040000000010408A020F700E600CA00CA
018E05632E98D440D2FF990DEA8D98AC818704BF008401042A3065407401320000010468205D0000
00010408204000000001040820400000000104082040000000010408204000000001040820400000
00010408204000000001040820400000000104082040000000010408204000000001040820400000
00010408204000000001040820400000000104082040000000010408204087

4)

FF01020810408000000001040820400000000104082040000000010000010408A060AA15B8010208
10408000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204000000001040820400000000104
0820400000000104082040000000010408204000000001040820404024034903E8DB405B60010428
3052000004420102081040BF2101F404F3056B0A104060D2024209CB24D899608D022E092B4D5869
6021024A024E09FB24589A608D02490243024E093B499834602700182DBA0E1040CA270341022898
16020850630C20400000000114AC1440800000000104A8000001040820400000000154A80B203E80
F900E5018D055B2A58D44096FF8D0D3A234C5E208382D3008401E42A306540740143000001046820
5D000000010408204000000001040820400000000104082040000000010408204000000001040820
40000000010408204000000001040820400000000104082040000000010408204000000001040820
40000000010408204000000001040820400000000104083040000000000000007DFF

5)
FF00000000000000000000000000000000000000000080010000000000015415B800000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000010408204000034D1A480DA0B640B701FF0102281852800002420102081040BF2201F404
EC018D010248586960688139098324982360170244094B4D984860A5024E09FB24589A608D024A02
43024D093B49D824602700182DBA0E1040CA27034102289816020850630C204000000001148C1C40
8000000001140C1840800000000104082040000575016400CA00CA018D055B2A58D440D7FF8903A1
23ECAB206482E8011A0D1052C02A03A10596020810408003E8010208104080000000010408204000
00000104082040000000010408204000000001040820400000000104082040000000010408204000
00000104082040000000010408204000000001040820400000000104082040000000010408204000
000001040820400000000104082040000090

6)

FF01020810408000000001040820400000000104082040000000010000010408A060AA15B8010208
10408000000001040820400000000104082040000000010408204000000001F40104082040000000
01040820400000000104082040000000010408204000000001040820400000000104082040000000
010408204000000001040820400000000104082040000000FD0134086D206A006803B90BCC000005
060A204081420102081040BF2201F404D4056B0A104060D202430238023009B32498916068814902
4209534DD89A6024589A608D024A0243024C0247093B49981240834B970000A57634102580C03E71
010228EC0C204000000001148C1C408000000001140C1840800000000104082040000575016400CA
00CA018D055B2A58D440DA2135E835B0579020C11640480091012A03A105D60D2040000006A10104
08204000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204000000009FD

7)

FF01020810408000000001040820400000000104082040000080010000010608F060FF15B8000000
000000000000000000000000000000000000000000000000000000FF000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000FF00035003520067036D01FF000001900000024200000000FC2201F404
CC018E0000024902430238022F0235022E024202490241024A024F023F0249023502490242024B02
470247024E000C4B9700002927035000023E71010228EC0C20400000000114AC1440800000000114
8C3040000000010408204000000A75016400CA00CA018E05632E98D440492937881AB0F0810A04D1
0112091052C02A03A105B6061020800003A101040820400000000104082040000000010408204000
00000104082040000000010408204000000001040820400000000104082040000000010408204000
00000104082040000000010408204000000001040820400000000104082040000000010408204000
000001040820400000006DFF

8)

FF01020810408000000001040820400000000104082040000000010000010408A060AA15B8010208
10408000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204040D2035200D003B5130C104080
0190010248984880000000F181168C3F30F8C08D000009964D30488138022E09AB24989160488149
024109534DD89A6024589A602360D2024209534DD8246024602700182DBA0E1040CA270341022898
16020850630C20400000000114CC1440800000000104A8000001040820400000000154880F203E80
F900E5018E055B2A58D44094FF950DDA8D182BC1FF04C60112099054606540740139010208104040
74000001040820400000000104082040000000010408204000000001040820400000000104082040
00000001040820400000000104082040000000010408204000000001040820400000000104082040
0000000104082040000000010408204000000001040820400000000104082040003B

9)

FF01020810408000000001040820400000000104082040000000010000010408A060AA15B8010208
10408000000001040820400000000104082040000000010408204000000001040820400000000104
08204000000001040820400000000104082040000000010408204000000001040830408000000000
0000000000000000000000000000000000000000000000035003520067036D020000000190000002
4200000000FC2101F404F3018D0000024902420239022E0234022D024102490241024A024F023F02
490236024A0241024902460247024E000C4B9700002927034F00013E710000191F00000000000001
8D00000000000000FC0000000000000000000005DB00E600E500E5018D018B018D035BFF8D036704
C3050D04D500430090012A03E8015C0000000003A101040820400000000104082040000000010408
20400000000104082040000000010408204000000001040820400000000104082040000000010408
20400000000104082040000000010408204000000001040820400000000104082040000000010408
2040000000010408204000000091FF

10)

FF01020810408000000001040820400000000104082040000000010000010408A060AA15B8010208
10408000000001040820400000000104082040000000010408204000000001F40104082040000000
01040820400000000104082040000000010408204000000001040820400000000104082040000000
010408204000000001040820400000000104082040000000FD013488B540A900CE03B50BEC010428
3052000004420102081040BF2101F404E1056B0A104060D2024109CB24589160CD022D090B495869
6090024A024F023F094B4D982360A50241094B4D98346024602700182DBA0E1040CA270341022898
16020850630C204000000001148C1C40800000000114EC3040000000010408204000000A7D00CC00
CA00CA018D055B2A58D440A531374889305A811C04E5008401142E3065407401610000010468205D
00000001040820400000000104082040000000010408204000000001040820400000000104082040
00000001040820400000000104082040000000010408204000000001040820400000000104082040
000000010408204000000001040820400000000104082040000000010408204069

Improve this question
2
  • It might be useful if you annotated the fields you already decoded in the packet dumps.
    – user22967
    Apr 20, 2018 at 20:30
  • Done! As i mentioned, it's not consistent. I can see values in some packets, but maybe it is coincidence and i'm reading it wrong.
    – coddr
    Apr 20, 2018 at 20:49

1 Answer 1

Reset to default
-1

So I got it working, turns out I used wrong parity, din't know you can override davice manager port settings from VB. Thanks.

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