Table of Contents
5
COM465IP-COM465DP_D00216_02_M_XXEN/03.2017
6.1.1 Exception code ...................................................................................................................... 39
6.1.2 Modbus requests .................................................................................................................. 39
6.1.3 Modbus responses ............................................................................................................... 40
6.1.4 Structure of the exception code ...................................................................................... 40
6.1.5 Modbus address structure for BMS devices ................................................................ 40
6.2 Modbus process image in the memory of the COM465… .................................... 41
6.2.1 Querying data ........................................................................................................................ 41
6.2.1.1 Modbus function code FC03 ...................................................................................... 41
6.2.1.2 Modbus function code FC04 ...................................................................................... 41
6.2.1.3 How are the memory areas organised? ................................................................. 41
6.2.2 Memory scheme of the process image ......................................................................... 42
6.2.2.1 Structure of the process image ................................................................................. 42
6.2.2.2 Memory scheme of an individual device ............................................................... 42
6.2.2.3 Device type ....................................................................................................................... 44
6.2.2.4 Timestamp ........................................................................................................................ 44
6.2.2.5 C = Common alarm and D = Device lost (device failure) ................................. 44
6.2.2.6 Channels 1 to 32 with analogue and/or digital values ..................................... 44
6.2.2.7 Float = Floating point value of the channels ....................................................... 45
6.2.2.8 A&T = Alarm type and test type (internal/external) .......................................... 45
6.2.2.9 R&U = Range and unit .................................................................................................. 46
6.2.2.10 Channel description ...................................................................................................... 47
6.2.2.11 Channel 33 to 64 ............................................................................................................ 48
6.2.3 Modbus examples to read out data ............................................................................... 49
6.2.4 Reference data records of the process image ............................................................ 50
6.2.4.1 Address assignment of the reference data record ............................................. 50
6.2.4.2 Reference value on channel 1 ................................................................................... 50
6.2.4.3 Reference value on channel 2 ................................................................................... 51
6.2.4.4 Explanation of how to access floating point values .......................................... 51
6.2.5 Channel descriptions for the process image .............................................................. 52
6.2.6 Modbus control commands .............................................................................................. 56
6.2.6.1 Modbus example for control commands .............................................................. 58
7. Troubleshooting ................................................................................................... 59
7.1 Malfunctions ........................................................................................................................... 59
7.1.1 What should be checked? .................................................................................................. 59
7.1.2 Frequently asked questions .............................................................................................. 59
7.2 Maintenance ........................................................................................................................... 60
7.3 Cleaning ................................................................................................................................... 60
8. Technical specifications ...................................................................................... 61
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