E+E Elektronik EE160, User Manual, Page: 9 / 13

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User Manual EE160 Humidity and Temperature Sensor for HVAC Applications
4.3 BACnet Setup
BACnet PICS is available for download at www.epluse.com/EE160 .
4.4 Digital Interface RS485 with Modbus RTU Protocol
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 245 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 EE160 represents 1 unit load on an RS485 network.
Device address, baud rate, parity and stop bits can be set via:
1. EE-PCS Product Configuration Software, the USB 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 at www.epluse.com/EE160 )
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 sensor name is located in register address 0x09. The beforementioned registers can
be read out with function code 0x03 or 0x04.
Please note: When reading the serial number or the sensor name, it is always necessary to read all 8
registers, even if the desired information requires less.
Please note: For obtaining the correct floating point values, both registers have to be read within
the same reading cycle. The measured value can change between two Modbus requests, therefore,
exponent and mantissa may get inconsistent.
Communication settings (INTEGER 16 bit)
Parameter
Register number
1)
[DEC] Protocol address
2)
[HEX]
Write register: function code 0x06
Slave ID (Modbus address) 1 0x00
Modbus protocol settings 3) 2 0x01
1) Register number starts from 1.
2) Protocol address starts from 0.
3) For Modbus protocol settings see Application Note Modbus AN0103 (available at www.epluse.com/EE160).
INFO (read register)
Parameter
Register number
1)
[DEC] Protocol address
2)
[HEX]
Read register: function code 0x03 / 0x04
Serial number (as ASCII) 1 0x00
Firmware version 9 0x08
Sensor Name 10 0x09
1) Register number starts from 1.
2) Protocol address starts from 0.