Vaisala Hydromet Data Collection Platform - Manual (Page 134)

User's Guide ______________________________________________________________________
132 _________________________________________________________________ M210933EN-C
The functionality of the following devices has been tested with modem
control:
- DXM Modem for PSTN
- Siemens MC35 for GSM/GPRS
Minimum System Requirements
The following minimum software versions are required: QML logger
version 4.05 and Lizard Setup Software version 4.05.
When updating or adding new functionality to the setups made with
earlier versions, you need to remove the existing modem(s) from the
setup and reconfigure the setups using the new equipment definitions.
Hardware Configuration
To keep the fixed RS-232 line COM0 free for local service use, it is
recommended that the QML logger is equipped with an additional RS-
232 module (DSU232) for the modem connection. This module can be
added in the Optional hardware view of Lizard Setup Software.
Keep the following RS-232 line default parameters:
- Speed: 9600 bps (see note below)
- Data bits: 8
- Stop bits: 1
- Parity: None
NOTE If you are using the old Siemens M20T modem, the communication
speed must be set to 19200 bps. Siemens GSM/GPRS modems have
an autobaud feature, and you can use the 9600 bps speed.
NOTE If you are planning to transfer the log files with the AWS Client
software or with another ZModem-capable software over the modem
connection, it is highly recommended that you increase the transmit
buffer size in the QML logger. Enter 12000 to the Transmit [bytes]
field under Buffers in the Optional hardware view.