Vaisala HUMICAP HMT330 SERIES Uživatelská příručka Strana 141
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Hodnocené. / 5. Na základě hodnocení zákazníků
Chapter 5 ________________________________________________________________ MODBUS
VAISALA ______________________________________________________________________ 139
CHAPTER 5
MODBUS
This chapter contains information that is needed when operating the
transmitter using the MODBUS protocol.
Overview of MODBUS Protocol Support
The HMT330 transmitter can be accessed using the MODBUS serial
communication protocol. Support for MODBUS protocol is available on
all HMT330 transmitters as a standard feature from software version 5.10
onward. The supported MODBUS variants and the connections they use
are listed in Table 31 below.
Table 31 Supported MODBUS Variants
Supported MODBUS Variant Connections
MODBUS RTU (Serial MODBUS) RS-232 (standard User Port)
RS-422/428 Interface (optional module)
MODBUS TCP (Ethernet MODBUS) LAN Interface (optional module)
WLAN Interface (optional module)
The supported MODBUS functions, registers, configuration options, and
diagnostics are described in Appendix C, MODBUS Reference, on page
195.
Note the following limitations of the MODBUS implementation:
- MODBUS TCP mode accepts only one TCP connection at a time.
Design the system so that only one MODBUS TCP client accesses the
transmitter.
- MODBUS TCP can process reliably only one MODBUS transaction
at a time. Reduce the polling rate of the client to avoid nested
transactions.
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 4 4
- CHAPTER 6 7
- CHAPTER 7 7
- CHAPTER 8 7
- List of Figures 9
- List of Tables 11
- GENERAL INFORMATION 13
- Version Information 14
- Documentation Conventions 14
- ESD Protection 15
- Recycling 16
- Regulatory Compliances 16
- DNV Type Approval 17
- Patent Notice 18
- Trademarks 18
- PRODUCT OVERVIEW 21
- Basic Features and Options 22
- Structure of the Transmitter 23
- 0508-010 24
- 0911-066 26
- INSTALLATION 29
- 0804-065 30
- 0503-004 30
- Pole or Pipeline 32
- 0503-007 33
- 0503-041 33
- Panel Mounting Frame 35
- Cable Bushings 36
- Grounding the Cables 37
- WARNING 39
- CAUTION 40
- 0703-041 41
- 0507-024 43
- Applications 45
- 0506-029 46
- 0503-034 46
- Temperature Probe (Optional) 48
- Standard 178 mm 120 mm 49
- Optional 400 mm 340 mm 49
- Tightening the Clasp Nut 50
- Optional Modules 51
- Installation 52
- Warnings 53
- Third Analog Output 56
- Installation and Wiring 57
- RS-422/485 Interface 59
- 1 (not connected) Rx D0 61
- 2 (not connected) Rx D1+ 61
- 3 Common Common 61
- 4 D0- Tx D0 61
- 5 D1+ Tx D1+ 61
- Figure 37 4-Wire RS-485 Bus 62
- RS-485 master Data HMT330 63
- D1+ ↔ D1+ 63
- D0- ↔ D0 63
- LAN Interface 64
- WLAN Interface 65
- Attaching the WLAN Antenna 66
- Data Logger Module 67
- 0706-068 68
- OPERATION 71
- Graphic History 72
- 0706-030 73
- Changing the Language 75
- Rounding Setting 75
- Display Backlight Setting 75
- Display Contrast Setting 76
- Keypad Lock (Key guard) 76
- Menu PIN Lock 76
- Display Alarms 77
- Configuring a Display Alarm 78
- 0802-069 79
- 0802-070 79
- Serial Line Communication 81
- User Port Connection 82
- Service Port Connection 83
- LAN Communication 84
- IP Configuration 85
- Wireless LAN Configuration 88
- Communication Protocol 91
- Terminal Program Settings 92
- 0810-070 93
- List of Serial Commands 95
- Outputting Reading Once 98
- FTIME and FDATE 100
- General Settings 102
- Using Serial Line 103
- Examples: 104
- Using Display/Keypad 106
- Date and Time 107
- Data Filtering 108
- Device Information 109
- Serial Output Settings 112
- Data Recording 117
- View Recorded Data 118
- Deleting the Recorded Files 120
- Analog Output Settings 121
- 0503-045 122
- AMODE/ASEL 124
- Analog Output Tests 125
- Operation of Relays 127
- 1102-007 128
- 1102-040 130
- 0706-003 132
- Testing Operation of Relays 134
- Sensor Functions 135
- Manual Chemical Purge 136
- Chemical Purge in Power Up 136
- Using Buttons on Motherboard 137
- Sensor Heating 139
- CHAPTER 5 141
- Taking MODBUS into Use 142
- Enabling Serial MODBUS 143
- Enabling Ethernet MODBUS 145
- Diagnostic MODBUS Counters 148
- Disabling MODBUS 149
- MAINTENANCE 151
- Changing the Sensor 152
- Error States 153
- Table 32 Error Messages 154
- Technical Support 155
- Product Returns 155
- CALIBRATION AND ADJUSTMENT 157
- 0508-013 158
- 0706-007 158
- Temperature Adjustment 163
- Analog Output Adjustment 165
- TECHNICAL DATA 167
- Optional Temperature Probe 168
- Calculated Variables 169
- 1013 mbar) 169
- Probe Option) 171
- Operating Environment 171
- Inputs and Outputs 172
- Mechanics 172
- Modules 173
- Relay Module 174
- RS-485 Module 174
- LAN Interface Module 174
- WLAN Interface Module 174
- Options and Accessories 175
- Dimensions (mm/inch) 177
- 0804-035 178
- 0804-060 180
- 0804-059 180
- Temperature Probe 182
- PROBE INSTALLATION KITS AND 183
- INSTALLATION EXAMPLES 183
- HMT337) 184
- Cable Gland 186
- 0508-015 187
- 0508-022 187
- 0507-015 189
- 0507-043 190
- 0804-063 192
- MODBUS REFERENCE 197
- Register Map 198
- 16-Bit Integer Format 199
- Measurement Data (Read-Only) 200
- Status Registers (Read-Only) 201
- Configuration Registers 201
- Exception Status Outputs 202
- Diagnostic Sub-Functions 203
- Exception Responses 204
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