Manual

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

37 of 48

Document title

9. Operation on a network

9.1 Baud rate and communications protocol compatibility

requirements

Depending on the model, devices from ROTRONIC use one of the following Baud rates as the

factory default:

57600 bps: HygroLog HL-NT data logger and docking stations

19200 bps: HygroPalm and HygroLab indicators, HygroFlex and M33 transmitters,

HygroClip Alarm programmable alarm card, HygroClip DI interface, HygroStat MB Thermo-

Hygrostat

IMPORTANT:

All devices connected to the same RS-485 multi-drop network (master and slaves) must

use the same Baud rate and the same communications protocol.

The communications protocol used by the HygroLog HL-NT is compatible with previous

versions of the HygroLog NT and with legacy products such as the HygroFlex 2 or 3. The

HygroLog HL-NT cannot be used in the same RS-485 multi-drop network as a HF4 or HF5

transmitter and similar products that rely on the RO-ASCII communications protocol..

In the case of a docking station with an internal Ethernet (TCP/IP) module, the Baud rate of

the Ethernet module must be the same as the Baud rate of the HygroLog HL-NT used with

the docking station.

Devices and internal Ethernet modules with mismatched Baud rate will not communicate

together.

The Baud rate configuration of a ROTRONIC device can be changed with the Device

Manager function (Digital Interface tab) available from within the HW4 software.

The Baud rate of a Digi internal Ethernet module can be changed only from the module

web interface. See separate document IN-E-TCPIP-Conf_11 (available in PDF format).

9.2 Ethernet local area network

ROTRONIC devices with an Ethernet (TCP/IP) interface presently use an internal module

manufactured by Digi International (Digi Connect ME for a wired connection, Digi Connect WI-ME

for a wireless connection). Both types of module feature a web interface that is used to configure

the module.

IMPORTANT: The TCP/IP settings of any docking station with Ethernet interface should be

configured to be compatible with the local area network. Detailed instructions are provided

separately in document IN-E-TCPIP-Conf_11 (available in PDF format).