
Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 65
0506-033
Figure 36 Connection Example Between PC Serial Port and
User Port
Connections to pins 4,6,7 and 8 on PC serial port are required only if
you are using software requiring hardware handshaking.
NOTE
User port cannot be used when RS-485 module is connected.
Service Port Connection
Table 13 Fixed Communication Settings for Service Port
Parameter Value
Bauds 19200
Parity No
Data bits 8
Stop bits 1
Flow control None
1. Connect the serial interface cable (optional accessory, order
code: 19446ZZ) between the serial port of your PC and the
service port connector on the motherboard, see Figure 39 on
page 67.
2. Open a terminal program and set the communication settings
(see the following section for more detailed instructions).
3. Power-up the PTU300.
After power-up the transmitter (in STOP-mode) outputs the software
version and the command prompt.
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