E+E Elektronik EE850, Руководство пользователя

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User Manual EE850 Duct Sensor
3.5.4 Modbus Setup
Item Factory settings Selectable values (via EE-PCS)
Baud rate 9 600 9 600, 19 200, 38 400, 57 600, 76 800, 115 200
Data bits 8 8
Parity Even None, odd, even
Stop bits 1 1, 2
Slave address 67 1...247
Tab. 1 Digital interface default settings
The recommended settings for multiple devices in a Modbus RTU network are 9600, 8, even, 1.
The EE850 represents 1/10 unit load on an RS485 network.
Device address, baud rate, parity and stop bits can be set via:
1. EE-PCS Product Configuration Software and the Modbus configuration adapter HA011066.
The EE-PCS can be downloaded free of charge from www.epluse.com/configurator
2. Modbus protocol in the register 60001 (0x00) and 60002 (0x01).
See Modbus Application Note AN0103 (available on www.epluse.com/EE850 )
The serial number as ASCII code is located in the register addresses 0x00...0x07 (16 bits per address).
The firmware version is located in the register address 0x08 (bits 15...8 = major release; bits 7...0 =
minor release). The beforementioned registers can be read out with function code 0x03 or 0x04.
The measured data is saved as 32 bit floating point values (data type FLOAT) and as 16 bit signed
integer values (data type INTEGER).
FLOAT 32 bit
Parameter Unit Register number
1)
[DEC] Register address
2)
[HEX]
Read register: function code 0x03
Temperature T
° C 1003 0x3EA
° F 1005 0x3EC
Relative Humidity % 1021 0x3FC
CO
2
(average) ppm 1061 0x424
CO
2
(raw) ppm 1063 0x426
Water vapour partial pressure
mbar 1101 0x44C
psi 1103 0x44E
Dew point temperature
°C 1105 0x450
°F 1107 0x452
Absolute humidity
g/m
3
1113 0x458
gr/ft
3
1115 0x45A
Mixing ratio
g/kg 1121 0x460
gr/lb 1123 0x462
Specific enthalpy
kJ/kg 1125 0x464
ft lb/lb 1127 0x466
BTU/lb 1129 0x468
Frost point temperature
°C 1131 0x46A
°F 1133 0x46C
1) Register number starts from 1
2) Register address starts from 0