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WIKA operating instructions, model GDM-RC-100-T
EN
14499439.01 01/2022 EN/DE
If Windows
®
is used with non-Latin character sets (e.g. Chinese), the area
settings of the system control must be changed to English (USA), since
otherwise, communication problems might occur.
5.6.2.3 Data logger
The data logger is used for recording measured values over a certain time span.
After setting up COM ports, the baud rate and the min./max. address or interval, the
recording can be started. For continuous recording, it is possible to record the measured
data in the selected interval in a text file divided by tabs.
The recording is started with the green start symbol. Stop the recording using the red
stop symbol.
5.6.2.4 Modbus
®
register and functional description
The following documents (available under www.Modbus.org) are recommended for
understanding the Modbus
®
architecture which the following chapters will refer to.
■
Modbus APPLICATION PROTOCOL SPECIFICATION
■
Modbus over Serial Line Specification and Implementation Guide
The register structure is described in the following.
Communication via messages
General form of the messages
Instrument address
Function
Data
CRC check
8 bit
8 bit
n x 8 bit
16 bit
In accordance with Modbus
®
specification, separate messages must be divided by an
intermission of at least 3.5 characters.
5. Commissioning, operation