Beckhoff BC3150 User Manual Page 26
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Safety Instructions
24 Fieldbus Components
Note
In systems with more than two stations all devices are wired in parallel. It is essential that
the bus cables are terminated with resistors at the conductor ends in order to avoid
reflections and associated transmission problems.
Distances
The bus cable is specified in EN 50170. This yields the following lengths for a bus segment.
Baud rate in kbits/sec 9.6 19.2 93.75 187.5 500 1500 12000
Cable length in m 1200 1200 1200 1000 400 200 100
Stubs up to 1500 kbaud <6.6 m; at 12 Mbaud stub segments should not be used.
Bus segments
A bus segment consists of at most 32 devices. 126 devices are permitted in a Profibus network. Repeaters are
required to refresh the signal in order to achieve this number. Each repeater is counted as one device.
IP-Link is the subsidiary bus system for Fieldbus Boxes, whose topology is a ring structure. There is an IP master in
the coupler modules (IP230x-Bxxx or IP230x-Cxxx) to which up to 120 extension modules (IExxxx) may be
connected. The distance between two modules may not exceed 5 m. When planning and installing the modules,
remember that because of the ring structure the IP-Link master must be connected again to the last module.
Installation guidelines
When assembling the modules and laying the cables, observe the technical guidelines provided by the Profibus User
Organization (Profibus Nutzerorganisation e.V.) for Profibus DP/FMS (see www.profibus.com).
Checking the Profibus wiring
A Profibus cable (or a cable segment when using repeaters) can be checked with a few simple resistance
measurements. The cable should meanwhile be removed from all stations:
1. Resistance between A and B at the start of the lead: approx. 110 Ohm
2. Resistance between A and B at the end of the lead: approx. 110 Ohm
3. Resistance between A at the start and A at the end of the lead: approx. 0 Ohm
4. Resistance between B at the start and B at the end of the lead: approx. 0 Ohm
5. Resistance between screen at the start and screen at the end of the lead: approx. 0 Ohm
If these measurements are successful, the cable is okay. If, in spite of this, bus malfunctions still occur, this is usually
a result of EMC interference. Observe the installation notes from the Profibus User Organization (www.profibus.com).
- BC3150 - Bus Terminal 1
- Controller for PROFIBUS 1
- Contents 3
- 5. Programming 51 4
- 6. PROFIBUS 81 5
- 8. Appendix 97 5
- 1. Foreword 6
- Safety Rules 7
- State at Delivery 7
- Personnel Qualification 7
- Documentation Issue Status 8
- Firmware BC3150 8
- 2. Product Overview 9
- Safety Instructions 10
- 8 Fieldbus Components 10
- Fieldbus Components 9 11
- The interfaces 12
- Technical Data 13
- 12 Fieldbus Components 14
- Technical Data - PROFIBUS DP 15
- Technical Data - PLC 16
- 3. Mounting and Wiring 17
- Installation 18
- Potential groups 19
- PE power contacts 20
- Power contacts supply (Up) 21
- Power contacts 21
- KS2000-Z2 22
- M12 circular connector 23
- Nine pole D-Sub 23
- Profibus conductor colors 23
- 22 Fieldbus Components 24
- Cable-based transmission 25
- Distances 26
- Bus segments 26
- Installation guidelines 26
- Checking the Profibus wiring 26
- Fieldbus Components 25 27
- Setting the slave address 28
- Configuration 29
- Configuration types 29
- 28 Fieldbus Components 30
- Creating a BX File 31
- Selecting the target system 32
- Fieldbus Components 31 33
- Fieldbus Components 33 35
- Mapping code 36
- Data memory mapping 36
- Used code and data memory 37
- Other memory 37
- Reading AMS Net ID 38
- PROFIBUS 39
- Master Configuration 40
- DEFAULT CONFIG 41
- Opening an existing BX file 41
- 40 Fieldbus Components 42
- Fieldbus Components 41 43
- Inserting the images 44
- Inserting the GSD files 44
- BX3100 parameter data 45
- BX3100 module configuration 46
- Fieldbus Components 45 47
- 46 Fieldbus Components 48
- K-Bus variables 49
- Inserting a PLC project 50
- Measuring the PLC Cycle Time 51
- 50 Fieldbus Components 52
- 5. Programming 53
- TwinCAT PLC 54
- Online Change 54
- TwinCAT PLC error codes 55
- Error POUs 55
- Global memory error 56
- Remanent data 57
- Allocated Flags 58
- Example structure 59
- 58 Fieldbus Components 60
- Mapping of the Bus Terminals 61
- 60 Fieldbus Components 62
- Creating a boot project 63
- PLC Control 63
- Deleting a boot project 63
- 62 Fieldbus Components 64
- General Settings 65
- Downloading a program 66
- Uploading a program 67
- Password 68
- Libraries 69
- Download 69
- TcSystemBCxx50 69
- 68 Fieldbus Components 70
- TcBaseBX 71
- System task info type 72
- System Info 73
- System Info Type 74
- Local ADS Port Numbers 75
- Register port 100 76
- Start Debug Timer function 77
- Read Debug Timer function 77
- Example 77
- Program Transmission 78
- Fieldbus Components 77 79
- Transmission via PROFIBUS 80
- Fieldbus Components 79 81
- Process Image 82
- TWINCAT CONFIG 82
- 6. PROFIBUS 83
- Diagnostic functions 84
- Sync and Freeze Mode 85
- System behavior 85
- Protection mechanisms 86
- Ident number 86
- DP StartUp 87
- Cyclic data exchange 87
- States in the master 88
- PROFIBUS DPV1 89
- Cables, Plugs and Switches 90
- Fieldbus Components 89 91
- 90 Fieldbus Components 92
- Topology 93
- Diagnostics 94
- PROFIBUS state 94
- State of the K-Bus 95
- Diagnostic LEDs 96
- LEDs for K-Bus diagnostics 96
- LED bus - fieldbus diagnosis 97
- LED PLC - PLC diagnosis 98
- 8. Appendix 99
- Program description 100
- Moving from BCxx00 to BCxx50 101
- Moving from BCxx00 to BXxx00 102
- Retain data 103
- Allocated variables 103
- Task configuration 103
- Firmware Update 104
- Firmware update program 104
- Safety Instructions 105
- Fieldbus Components 103 105
- 104 Fieldbus Components 106
- General Operating Conditions 107
- Environmental conditions 107
- Component identification 108
- Standards for Device Testing 109
- Vibration / Shock resistance 109
- Bibliography 110
- German books 110
- English books 110
- PROFIBUS-DP standards 110
- Web sites 110
- List of Abbreviations 111
- Support and Service 112
- Beckhoff Support 112
- Beckhoff Service 112
- Beckhoff Headquarters 112
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