Vaisala DMP248, Operating Manual

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C
HAPTER
4 _____________________________________________________________
COMMISSIONING
V
AISALA
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When the serial bus has been connected between the PC and the
transmitter, the PC is switched on. When using a PC, a terminal
emulation programme (e.g. HyperTerminal, Procomm Plus, Datastorm
or Windows terminal) is started.
The factory settings for data transfer are:
•
4800 baud
•
even parity
•
7 data bits
•
1 stop bit
•
full duplex
NOTE When the serial bus settings are changed, the transmitter has to be
reset before the new settings become effective.
The processor does not allow the following combinations:
•
no parity, 7 data bits, 1 stop bit: if this combination is given the
DMP248 programme will change the number of stop bits to 2.
•
even or odd parity, 8 data bits, 2 stop bits: if this combination is
given the programme changes the number of stop bits to 1.
Refer to the manuals of the PC and the terminal emulation programme
when giving serial settings.
The RS 232C screw terminal cannot be used if an RS 485/422 serial
module or a current loop module is used. See Appendices 3 and 4 on
how to install and operate these modules.
In calibrating or changing the settings of the transmitter, it can be
more convenient to use the connector X17, if connector X6 is already
in use. This connector, however, transfers only RS 232C signals. If a
RS 485/422 serial port module or a current loop module has been
installed, it has to be removed before communicating through the X17
connector.
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