Section II Operating Instructions Teledyne API T802 Paramagnetic O2 Analyzer Operation Manual
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6.2.1. COM PORT COMMUNICATION MODES
Each of the analyzer’s serial ports can be configured to operate in a number of
different modes, listed in Table 6-1. As modes are selected, the analyzer sums
the mode ID numbers and displays this combined number on the front panel
display. For example, if Quiet mode (01), computer mode (02) and Multi-Drop-
Enabled mode (32) are selected, the analyzer would display a combined MODE
ID of 35.
Table 6-1: COM Port Communication Modes
MODE1 ID DESCRIPTION
QUIET 1
Quiet mode suppresses any feedback from the analyzer (such as warning messages) to
the remote device and is typically used when the port is communicating with a computer
program where such intermittent messages might cause communication problems.
Such feedback is still available but a command must be issued to receive them.
COMPUTER 2 Computer mode inhibits echoing of typed characters and is used when the port is
communicating with a computer operated control program.
HESSEN
PROTOCOL 16 The Hessen communications protocol is used in some European countries. TELEDYNE
API PN 02252 contains more information on this protocol.
E, 8, 1 8192 When turned on this mode switches the COM port settings from
● NO PARITY; 8 data bits; 1 stop bit to EVEN PARITY; 8 data bits; 1 stop bit.
E, 7, 1 2048 When turned on this mode switches the COM port settings from
● NO PARITY; 8 DATA BITS; 1 stop bit to EVEN PARITY; 7 DATA BITS; 1 stop bit.
RS-485 1024 Configures the COM2 Port for RS-485 communication. RS-485 mode has precedence
over multidrop mode if both are enabled.
SECURITY 4 When enabled, the serial port requires a password before it will respond (see Section
8.4). The only command that is active is the help screen (? CR).
MULTIDROP
PROTOCOL 32 Multidrop protocol allows a multi-instrument configuration on a single communications
channel. Multidrop requires the use of instrument IDs.
ENABLE
MODEM 64 Enables to send a modem initialization string at power-up. Asserts certain lines in the
RS-232 port to enable the modem to communicate.
ERROR
CHECKING2 128 Fixes certain types of parity errors at certain Hessen protocol installations.
XON/XOFF
HANDSHAKE2 256 Disables XON/XOFF data flow control also known as software handshaking.
HARDWARE
HANDSHAKE 8 Enables CTS/RTS style hardwired transmission han dshaking. This style of data
transmission handshaking is commonly used with modems or terminal emulation
protocols as well as by Teledyne Instrument’s APICOM software.
HARDWARE
FIFO 512 Disables the HARDWARE FIFO (First In – First Out), When FIFO is enabled it improves
data transfer rate for that COM port.
COMMAND
PROMPT 4096 Enables a command prompt when in terminal mod e.
1 Modes are listed in the order in which they appear in the
SETUP MORE COM COM[1 OR 2] MODE menu
2 The default setting for this feature is ON. Do not disable unless instructed to by Teledyne API Technical Support
personnel.
Note Communication Modes for each COM port must be configured
independently.
07275B DCN6418