ROTRONIC HygroLog HL-NT - Manual (Page 38)

IN-E-HL-NT-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroLog HL-NT data logger:
instruction manual Instruction Manual
Document Type
Page 38 of 48
Document title
© 2009-2012; Rotronic AG IN-E-HL-NT-V2_12
Docking station models with an Ethernet (TCP/IP) interface are shipped with a Device
Configuration Certificate that provides information about the factory configuration settings of both
the Ethernet module. See example below:
Setting
Value
DHCP or Static Address Static
IP Address 192.168.1.1
Subnet Mask 255.255.255.0
Default Gateway 192.168.1.0
TCP Port 2101
MAC Address 00:40:9D:28:2D:2A
Firmware Release (device) 1.4
User Name (web interface) rotronic
Password (web interface) wlan
Serial Port Configuration Profile TCP Sockets
Basic Serial Settings
Baud Rate 57600
Data Bits 8
Parity None
Stop Bits 1
Flow Control None
9.3 RS-485 multi-drop network
Most models of docking station feature a RS-485 connector. When the number of available PC
ports is limited, this connector can be used to connect together up to 64 devices in a multi-
dropped arrangement. In principle, an unlimited number of such networks can be monitored with
the HW4 software, but each RS-485 multi-drop network is limited to 64 devices. A docking station
with HygroLog HL-NT can be used either as a slave or a master, without special configuration.
The master is automatically the device that is directly connected to the PC or LAN by means of a
RS-232 port, USB port or TCP/IP port.
RS-485 Address: the RS-485 address is used to identify the individual devices that are
connected to a RS-485 multi-drop and must be unique to each device. This address is part of the
HygroLog HL-NT communications protocol. The factory default for the RS-485 address is 00. In
general, this address should not be changed manually (see note below). As far as HW4 is
concerned, all masters can share the same RS-
485 address. When the HW4 command “Search
for RS- 485 slaves” is being used, HW4 automatically changes from 00 to 01 the RS-485 address
of any master that has slaves attached. As a result, all masters end up with the same RS-485
network address (01). In addition, HW4 automatically changes the RS-485 address of the slaves
in each multi-drop from 00 (factory default) to a unique address ranging from 02 to 64. The same
address range (02 to 64) is used again when there is more than one multi-drop RS485 network.
Notes:
- We recommend using HW4 to give each HygroLog HL-NT a unique name for easier
identification.
- In the situation where an RS-485 network is to be monitored by software other than HW4,
you will have to use HW4 to give each device a unique RS-485 address prior to connecting to
the network.