Your communications software will most likely have a setup routine to set
the parameters listed below. These are the values the growth chamber is
using, so the computer parameters must match accordingly. Also, you will
probably have to select the “COM” serial port you chose when you
connected the cable from your computer to the growth chamber. The
software may ask what format the data is in. You should choose “ASCII”.
Parameter
Settings
Baud Rate:
Baud Rate value selected earlier in Step 1.
Parity:
None (0)
Data Bits:
Eight (8)
Stop Bits:
One (1)
COM Port:
Selected by user
Format:
ASCII
The growth chamber transmits information on its RS232 port as long as
the status update time interval is not “0.0.”
If you start your communication software with the growth chamber on,
most likely you will see the error(s) messages as follows:
ERR
? VALUE IS READ ONLY
? ILLEGAL COMMAND
Wait for the Status Update Time duration you selected to complete, and
the communications will correct itself.
Besides having the growth chamber transmit information in one of the
three formats, the user can monitor other values or even change some of
these from their computer.
Plant Growth Chamber
6-5
Thermo Scientific
Section 6
Factory Options
Setting up the Computer
for Communication
Using the Communication
