Vaisala DRYCAP DMT346 Guide de l'utilisateur Page 99
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Chapter 4 _________________________________________________________________ Operation
VAISALA________________________________________________________________________ 97
RS-485 Module Operation
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 64.
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
- List of Figures 7
- List of Tables 8
- GENERAL INFORMATION 11
- Version Information 12
- Related Manuals 12
- WARNING 13
- CAUTION 13
- ESD Protection 14
- Recycling 14
- Feedback 14
- Trademarks 15
- License Agreement 15
- Warranty 16
- PRODUCT OVERVIEW 17
- Basic Features and Options 19
- Operating Principle 19
- Parts Description 20
- Transmitter Body 20
- 0604-006 21
- Probes and Cooling Set 22
- INSTALLATION 23
- 0604-008 24
- 0604-009 25
- 0604-010 25
- 0604-011 26
- 0604-012 27
- Kit for Pole or Pipeline 28
- Mounting Rain Shield with 29
- Installation Kit 29
- Panel Mounting Frame 30
- DMT345 Probe Mounting 31
- Installation with Flange 31
- 0604-020 32
- Parts of the Cooling Set 34
- Mounting Instructions 35
- 0604-024 36
- 0604-025 37
- Cable Bushings 38
- Cable Grounding 39
- Connections to 24 VAC Power 42
- Power Supply Module 43
- Installation 44
- Warnings 45
- Alarm Relays 48
- RS-422/485 Interface 50
- 1 (not connected) RxB 51
- 2 (not connected) RxA 51
- 4 B TxB 51
- 5 A TxA 51
- RS-485 master Data DMT346 52
- 8-Pin Connector 54
- OPERATION 55
- Basic Display 56
- Graphic History 57
- Menus and Navigation 58
- Display Backlight Setting 59
- Changing Language Setting 59
- Rounding Setting 59
- Display Contrast Setting 60
- Keypad Lock (Keyguard) 60
- Menu PIN Lock 60
- Factory Settings 61
- Serial Line Communication 62
- User Port Connection 63
- Service Port Connection 63
- Terminal Program Settings 64
- DMT346/2.01 65
- List of Serial Commands 66
- Table 22 Other Commands 67
- Getting Measurement Message 68
- FTIME and FDATE 69
- Resetting the Device 71
- Keypad/Menu Locks 71
- General Settings 72
- Modifier Description 73
- Using Buttons on Motherboard 76
- User Port Serial Settings 77
- >SERI 600 N 8 1 78
- 600 N 8 1 78
- Mode Output Commands used 79
- SEND [addr] 79
- >INTV 10 min 79
- Output intrv. : 10 min 79
- OFF No filtering 80
- Device Information 81
- Data Recording 83
- Selecting Data Recording 83
- Quantities 83
- View Recorded Data 84
- Deleting Recorded Files 87
- Analog Output Settings 87
- 0503-045 88
- Analog Output Quantities 89
- AMODE/ASEL 90
- Analog Output Tests 91
- Setting 92
- Relay Operation 93
- Quantity for Relay Output 93
- Relay Setpoints 93
- Hysteresis 94
- Enabling/Disabling Relays 95
- Indication Led Operation 95
- Setting Relay Outputs 95
- 0605-040 96
- Testing Operation of Relays 98
- RS-485 Module Operation 99
- OPEN [nn] 101
- Sensor Functions 102
- AutoCal 102
- Automatic AutoCal 103
- Manual AutoCal 103
- Sensor Purge 104
- Power-Up Purge 105
- Manual Sensor Purge 105
- Interval Purge 105
- 0504-051 106
- Sensor Warming 107
- CALIBRATION AND ADJUSTMENT 109
- Adjustment Information 111
- Using Display/Keypad 112
- Using Serial Line 113
- >a01 117
- Wait for Purge data...OK 117
- Adjusting Temperature 118
- Adjusting Temperature Using 118
- Display/Keypad 118
- Adjusting Analog Outputs 120
- Serial Line 121
- MAINTENANCE 123
- Error States 124
- Error Message Action 125
- Technical Support 126
- Return Instructions 126
- Vaisala Service Centers 127
- TECHNICAL DATA 129
- 0605-043 130
- Property Description / Value 131
- Models) 132
- Options and Accessories 133
- Technical Specifications of 133
- Optional Modules 133
- Description Specification 134
- Dimensions in mm (inches) 135
- Spare Parts 136
- APPENDIX A 137
- CALCULATION FORMULAS 141
- 99.621 ⋅= 142
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