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Communications Setup and Operation Teledyne API T801 NDIR CO2 Analyzer Operation Manual
106
6.2.1. 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 num
bers 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
MODE
1
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
CHECKING
2
128
Fixes certain types of parity errors at certain Hessen protocol installations.
XON/XOFF
HANDSHAKE
2
256
Disables XON/XOFF data flow control also known as software handshaking.
HARDWARE
HANDSHAKE
8
Enables CTS/RTS style hardwired transmission handshaking. 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 mode.
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.
07274B DCN6418