Teledyne API – Model T300/T300M CO Analyzer
Communications Setup and Operation
137
6.2.3.
COM PORT TESTING
The serial ports can be tested for correct connection and output in the
COMM
menu.
This test sends a string of 256 ‘w’ characters to the selected COM port. While the test is
running, the red LED labeled TX for that COM port on the instrument’s rear panel
analyzer should flicker.
To initiate the test, access the COMMUNICATIONS Menu (SETUP>MORE>COMM),
then press:
Select which
COMM port to
test.
SETUP X.X
COMMUNICATIONS MENU
ID INET
COM1
COM2
EXIT
SETUP X.X
COM1 : TEST PORT
<SET
TEST
EXIT
SETUP X.X
TRANSMITTING TO COM1
<SET
TEST
EXIT
SETUP X.X
COM1 MODE:0
SET>
EDIT
EXIT
SETUP X.X COM1 BAUD RATE:19200
<SET
SET>
EDIT
EXIT
EXIT returns to
COMM menu
Test runs
automatically
Figure 6-3:
COMM – COM1 Test Port
6.3.
RS-232
The RS232 and COM2 communications (COMM) ports operate on the RS-232 protocol
(default configuration). Possible configurations for these two COMM ports are
summarized as follows:
•
RS232 port can also be configured to operate in single or RS-232 Multidrop mode
(Option 62); refer to Sections 3.3.1.8 and 5.7.1.
•
COM2 port can be left in its default configuration for standard RS-232 operation
including multidrop, or it can be reconfigured for half-duplex RS-485 operation
(please contact the factory for this configuration).
Note that when the rear panel
COM2
port is in use, except for multidrop
communication, the rear panel USB port cannot be used. (Alternatively, when the USB
port is enabled,
COM2
port cannot be used except for multidrop).
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