Vaisala DRYCAP DMT345 Betriebsanweisung Seite 119
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Chapter 4 ________________________________________________________________ Operation
VAISALA ______________________________________________________________________ 119
Operation of the RS-485 Module
RS-485 interface enables communication between RS-485 network and
DMT346 transmitter. The RS-485 interface is isolated and offers a
maximum communications rate of 115 200 bits/s. (For maximum bus
length of 1 km, use bit rate 19200 b/s or less.)
When selecting an RS-232-RS-485 converters for the network, avoid self
powered converters as they don't necessarily support the needed power
consumption.
Echo function shall be always disabled (OFF) when using the 2-wire
connection. When using the 4-wire connection you can disable/enable the
echo setting.
NOTE
User port on DMT346 main board cannot be used and connected when
RS-485 module is connected. Service port is operating normally.
Networking Commands
Set the RS-422/485 interface by using the following commands. The
other serial line commands are presented in section List of Serial
Commands on page 85.
RS-485 configuration commands SERI, ECHO, SMODE, INTV, and
ADDR may be issued by using either the service port or RS-422/485
port. Also the optional display/keypad can be used.
SERI
Use the SERI [b p d s] command to input RS-485 bus settings.
Syntax: SERI [b p d s]
where
b = baud rate (300, 600, 1200, 2400, 4800, 9600,19200, 38400,
57600, 115200)
p = parity (n = none, e = even, o = odd)
d = data bits (7 or 8)
s = stop bits (1 or 2)
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 4 4
- CHAPTER 5 6
- CHAPTER 6 6
- CHAPTER 7 7
- APPENDIX B 7
- List of Figures 9
- List of Tables 11
- GENERAL INFORMATION 13
- Version Information 14
- Related Manuals 14
- Feedback 14
- ESD Protection 15
- Recycling 16
- Regulatory Compliances 16
- Patent Notice 17
- Trademarks 18
- License Agreement 18
- Warranty 18
- PRODUCT OVERVIEW 19
- Basic Features and Options 20
- Operating Principle 21
- Structure of the Transmitter 22
- 0604-006 23
- Probes and Cooling Set 24
- INSTALLATION 25
- 0804-066 26
- 0604-009 26
- 0804-065 27
- 0604-011 27
- 0604-012 28
- Pole or Pipeline 29
- 0604-015 30
- 0604-016 30
- Panel Mounting Frame 31
- DMT345 Probe Mounting 32
- 0604-019 33
- 0604-020 33
- Parts of the Cooling Set 35
- Instructions 36
- 0604-024 37
- 0604-025 37
- Running 38
- Cable Bushings 39
- Cable Grounding 40
- 0605-028 41
- WARNING 42
- CAUTION 43
- 0703-041 44
- Optional Modules 45
- Warnings 46
- 2006/95/EEC) 49
- Third Analog Output 50
- Alarm Relays 51
- RS-422/485 Interface 53
- 0605-034 55
- LAN Interface 56
- WLAN Interface 57
- 0706-068 59
- 8-Pin Connector 60
- OPERATION 63
- Graphic History 64
- 0706-030 65
- Menus and Navigation 66
- Changing the Language 67
- Rounding Setting 67
- Display Backlight Setting 68
- Display Contrast Setting 68
- Keypad Lock (Keyguard) 68
- Menu PIN Lock 68
- Factory Settings 69
- Display Alarms 69
- Configuring a Display Alarm 70
- 0802-070 71
- Serial Line Communication 72
- Service Port Connection 73
- Using the Service Port 74
- LAN Communication 75
- Wireless LAN Configuration 78
- Telnet Settings 81
- Terminal Program Settings 82
- 0810-070 83
- 0810-071 84
- List of Serial Commands 85
- FTIME and FDATE 88
- General Settings 89
- Using Buttons on Motherboard 93
- Date and Time 94
- User Port Serial Settings 95
- >SERI 600 N 8 1 96
- 600 N 8 1 96
- Data Filtering 98
- Device Information 98
- 0706-012 99
- Resetting the Device 101
- Data Recording 102
- View Recorded Data 103
- Deleting Recorded Files 105
- Analog Output Settings 106
- 0503-045 107
- Analog Output Quantities 108
- AMODE/ASEL 109
- Analog Output Tests 110
- Operation of Relays 112
- Hysteresis 113
- Enabling/Disabling Relays 115
- Indication Led Operation 115
- Setting Relay Outputs 116
- Testing Operation of Relays 118
- Networking Commands 119
- OPEN [nn] 121
- Sensor Functions 122
- Automatic AutoCal 123
- Manual AutoCal 123
- Sensor Purge 124
- Interval Purge 125
- Power-Up Purge 125
- Sensor Warming 126
- MAINTENANCE 127
- 0706-017 128
- Technical Support 129
- Return Instructions 129
- Vaisala Service Centers 130
- CALIBRATION AND ADJUSTMENT 131
- Adjustment Information 132
- Using Display/Keypad 133
- Using Serial Line 134
- Display/Keypad 136
- Serial Line 137
- Adjusting Temperature 138
- Adjusting Analog Outputs 140
- TECHNICAL DATA 142
- 0605-043 143
- 0604-022 144
- Modules 146
- RS-485 Module 147
- LAN Interface Module 147
- WLAN Interface Module 147
- Data Logger Module 147
- Options and Accessories 148
- Dimensions (mm/inch) 149
- 0804-035 150
- APPENDIX A 151
- CALCULATION FORMULAS 153
- 68.216 154
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