12.1.4 RS 232 / 485-Interface
The measured pressure dew point values are cyclically passed out over the serial interface.
The documentation on interface protocol is available in the appendix.
The signals are given out both as per RS 232 and RS 485 standard. The interface is not
potentially isolated. The signal is cyclically passed out as ASCII-string without external
request.
The RS 232 interface is compatible to commercial PCs. A matching interface cable as well
as an USB adapter are available as accessories. The data format is compatible with the soft-
ware PCLOG.
12.1.5 Software PCLOG
T h e s o f t w a r e i s
u s e d
f o r
v i s u a l i s a t i o n o f
measured dew point
values in the plant
and is an efficient
tool for installation
o f
l a r g e
compressors and
c o m p r e s s e d a i r
systems.
Besides storing data
o f
m e a s u r e d
humidity values on
h a r d d i s k , t h e
software offers a very important feature of graphical representation of all measured and
recorded channels in the form of temperature Vs time chart (online scriber function). By
means of Drag & Click, the window section can be enlarged and the time or temperature axis
can be scaled as desired. Besides the graphic view, representation is also possible in the
form of a table. The in-between space is used for capturing measured data series into a
spreadsheet program (for example EXCELTM) or for word processing. All tables and graphic
representations can be printed out in colour. In addition, simple monitoring and regulation
functions are also integrated in the software. Limits can be set for each channel. An acoustic
signal is given out when the values are exceeded. Control of external alarm units is possible
by a relay card, which is to be attached at the USB port.
