Rs-232 Port - Teledyne 2010A Operating Instructions Manual

Thermal Conductivity Analyzer

3.3.8 Rs-232 Port

The digital signal output is a standard RS-232 serial communications
port used to connect the analyzer to a computer, terminal, or other digital
device. It requires a standard 9-pin D connector.
Output: The data output is status information, in digital form, up-
dated every two seconds. Status is reported in the following order:
•
•
•
•
•
Each status output is followed by a carriage return and line feed.
Input: The input functions using RS-232 that have been implemented
to date are described in Table 3-3.
Command
as<enter>
az<enter>
rp<enter>
st<enter>
rm1<enter>
rm2<enter>
rm3<enter>
rm4<enter>
ra<enter>
Implementation: The RS-232 protocol allows some flexibility in its
implementation. Table 3-4 lists certain RS-232 values that are required by
the Model 2010A implementation.
The concentration in ppm or percent
The range in use (01 = Range 1, 02 = Range 2, 03 = Range 3,
CAL = Range 4)
The scale of the range (0-100 %, etc)
Which alarms—if any—are disabled (AL–x DISABLED)
Which alarms—if any—are tripped (AL–x ON).
Table 3-3: Commands via Rs-232 Input
Description
Immediately starts an autospan.
Immediately starts an autozero.
Allows reprogramming of the APPLICATION (gas use) and
ALGORITHM (linearization) System functions.
Toggling input. Stops/Starts any status message output
from the RS-232, until st<enter> is sent again.
Range manual 1
Range manual 2
Range manual 3
Range manual CAL
Range auto
Teledyne Analytical Instruments
Part I: Control Unit
Part I 3-9