Siemens SITRANS LR 300 Instruction Manual Page 75
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7ML19985CL02 SITRANS LR 300 – INSTRUCTION MANUAL Page 73
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Parameters
P771 Bus Address (for Modbus) (F = 1)
Allocates the unique identifier of the SITRANS LR 300 on the network for the RS-485 port.
For devices connected with a serial Modbus slave protocol, this parameter is a number
from 1-247. The network administrator must ensure that all devices on the network have
unique addresses. Do not use the value 0 (zero) for Modbus communications because
this is the broadcast address and is inappropriate for a slave device.
P772 Baud Rate (F = 9.6)
Sets the communication rate with the master device.
This specifies the rate of communication in Kbaud. Any value may be entered, but only
the values shown are supported. The baud rate should reflect the speed of the connected
hardware and protocol used. For updating software, you must use 9600 baud.
P773 Parity (F = 0)
Sets the serial port parity for the RS-485 port.
P774 Data Bits and Stop Bits
There are eight data bits and one stop bit.
Values
Range: 0 to 99999
Pre-set: 1
Values
4.8 4800 baud
9.6 9600 baud
19.2 19,200 baud
38.4 38,400 baud
Values
0 No Parity (default)
1 Odd Parity
2 Even Parity
Notes:
• Ensure that the communications parameters are identical between the
SITRANS LR 300 and all connected devices.
• If 7 data bits are chosen for Modbus ASCII, then parity must be set to either 1 (odd)
or 2 (even), and not to 0 (no parity).
•
SITRANS LR 300.book Page 73 Monday, June 10, 2002 7:18 PM
- SITRANS LR 300 1
- Disclaimer of Liability 2
- Table of Contents 3
- General Information 7
- Performance 10
- Mechanical 10
- Approvals on page 10 11
- Specifications 12
- Programmer (remote keypad) 13
- Installation 15
- Beam Spreading 16
- Polarization Effect 16
- False Reflections 16
- Dimensions: Threaded Rod 19
- Dimensions: Shielded Rod 20
- Dimensions: Horn 21
- Dimensions: Waveguide 22
- Dimensions: Sanitary Horn 25
- Dimensions: Sanitary Rod 26
- Dimensions: Flanges 27
- Mounting 29
- Rod Assembly 30
- Rod Extension Requirements 30
- Mounting: Rod Assembly 30
- Mounting: Manhole Covers 31
- Mounting: Waveguide Antenna 32
- Smoothness 33
- Interconnection 35
- SITRANS LR 300 Wiring 36
- Communications Installation 37
- PC Connection 38
- Port Configuration 38
- Start Up 39
- Programming 40
- Hand Programmer 41
- Local Programming 41
- Key Programming Mode Run Mode 42
- Accessing PROGRAM Mode 43
- Accessing a Parameter 43
- Modifying a Parameter Value 44
- Accessing RUN Mode 45
- Quick Start Programming 45
- Operation 47
- Loss of Echo (LOE) 48
- Analog Output 49
- RUN/PROGRAM 50
- Application Examples 51
- Applications 52
- Parameter Enter 52
- Horn Antenna 53
- Digesters 54
- Parameter Descriptions 57
- P001 Operation (F = 3) 58
- P002 Material 58
- P004 Antenna (F = 240) 59
- P005 Units (F = 1) 59
- P006 Empty (F = 10m) 59
- P007 Span (F = 10m) 59
- P050 Tank Shape (F = 0) 60
- (F = – – – –) 63
- P060 Decimal Position (F = 2) 64
- Material Level 65
- Parameters 67
- Related Parameters 67
- P219 mA Output Fail-Safe 68
- P341 Run Time 68
- P342 Power-On Resets 68
- P343 Internal Temperature 69
- P346 Serial Number 69
- P700 Maximum Fill Rate 71
- P701 Maximum Empty Rate 71
- P709 Damping Filter 72
- P711 Echo Lock (F = 2) 72
- P712 Echo Lock Sampling 73
- P770 Serial Protocol (F = 1) 74
- P772 Baud Rate (F = 9.6) 75
- P773 Parity (F = 0) 75
- P774 Data Bits and Stop Bits 75
- P801 Range Extension (F = 5%) 77
- P805 Echo Confidence 77
- P806 Echo Strength 77
- P807 Noise 77
- Algorithm Parameter (P820) 78
- (P830 to P841) 78
- To change a breakpoint: 79
- (or when P837 = 0) 80
- Values (view only) 82
- 0.0000 to 99999 83
- P999 Master Reset 84
- Product ID (R40,064) 85
- Input/Output 86
- Format Word (R43,997) 87
- (R43,998) 88
- Communications: Data Types 89
- Text Messages 90
- Error Handling 91
- Communications 92
- Troubleshooting 93
- Operation Troubleshooting 94
- Maintenance 95
- Appendix I 97
- Appendix II 100
- Number Parameter Name Value 101
- Appendix III 103
- Appendix IV 104
- Appendix V 109
- Appendix VI 110
- HART Communicator 275: 111
- Supported HART Commands: 115
- Appendix VII: Profibus PA 116
- Bus Termination 117
- Power Demands 117
- Cyclic versus Acyclic Data 117
- Cyclic Data 117
- Appendix VII 118
- Status Word 119
- Diagnostics 120
- Acyclic Data 120
- Configuration Example: 120
- Profibus Level Device Design 121
- Transducer Block - Level 122
- Parameter Structure 123
- Linear conversion: 124
- Analog Input Function Block 124
- Device Management 125
- Physical Block 1 126
- Transducer Block 1 127
- Function Block 1 - Level 131
- Function Block 2 - Space 132
- Function Block 3 - Distance 133
- Function Block 4 - Volume 133
- Annex II, 1/0/6) 134
- Appendix VIII 136
- *7ml19985cl02* 140
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