Michell Instruments WM281, Руководство пользователя

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WM281/291 User’s Manual
16 97463 Issue 1, July 2014
appendix B
Appendix B Modbus Holding Register Map
B.1 Current Mapping of Modbus Holding Registers
Address Parameter
Access
Type
Min
Value
Max
Value
Default
Decimal
Points
Unit Description
0 Temperature Reading R - - - 2 °C/°F
Returns present value of
temperature channel
1 Humidity Reading R 0.0 100.0 - 1 %
Returns present value of
humidity channel
2 RESERVED R - - 0 0 - -
3 Model Type R - - - 0 - Returns device model type value
4 RESERVED R - - 0 0 - -
5
Calculated Variable
Reading
R - - - 1 -
Returns present value of
calculated channel
6-7
Current input
Reading
R 96 480 - 2 mV
Returns the voltage measured
across the main connector
pin which corresponds to the
current input supplied
8– 9 RESERVED R - - 0 0 - -
10
Actual Low
Temperature Scale
R - - -30.0 1 °C Returns fixed value -30°C
11
Actual High
Temperature Scale
R - - 140.0 1 °C Returns fixed value 140°C
14 Board Type R - -
0x0430
or
0x0C08
0 -
Returns board type identifier
Read 0x0430 on MS430 board &
Read 0x0C08 on HC08 board
15 – 22 RESERVED R - - 0 0 - -
23
Temperature Offset
Correction (Single
Point Calibration)
R/W -999 999 0 2 °C
get/Set Single Point Calibration
offset for Temperature input
24
Digital Temperature
Filter
R/W 0.0 20.0 0.8 1 Seconds
get/Set Digital Filter value for
Temperature input
40 – 44 RESERVED R - - 0 0 - -
45 Baud rate R/W 0 4 4 0 -
get/Set COM Baud rate setting
0 = 1200, 1 = 2400, 2 = 4800,
3 = 9600, 4 = 19200
46 ModBus Slave ID R 0 247 - 0 -
Returns ModBus Slave ID of
device
47 Parity R/W 0 2 0 0 -
get/Set COM Parity setting
0 = None, 1 = Odd, 2 = Even
48 – 49 RESERVED R - - 0 0 - -
50
Temperature Open/
Under range Counter
value
R 0 65535 0 0 -
Returns count value for number
of times the device has gone
below Temperature under limit
51
Temperature
Saturate/Over range
Counter value
R 0 65535 0 0 -
Returns count value for number
of times the device has gone
above Temperature over limit
52
Humidity Open/
Under range Counter
value
R 0 65535 0 0 -
Returns count value for number
of times the device has gone
below Humidity under limit
53
Humidity Saturate/
Over range Counter
value
R 0 65535 0 0 -
Returns count value for number
of times the device has gone
above Humidity over limit
57 – 59 RESERVED R - - 0 0 - -
64 RESERVED R - - 0 0 - -
69 – 119 RESERVED R - - 0 0 - -
120 Trademark R - - 5000 0 -
Reads Michell identifier in
ModBus
121 Device Type identifier R - - 129 0 - Reads type of device