Communications Setup and Operation Teledyne API – Model T300/T300M CO Analyzer
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6.2.1. COMMUNICATION MODES Either of the analyzer’s serial ports (RS232 or COM2 on rear panel) can be configured
to operate in a number of different modes, which are described 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 Multidrop-Enabled mode (32) are selected, the analyzer would display a
combined MODE ID of 35.
Table 6-1: COMM 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 mod e 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. TAPI P/N
02252 contains more information on this protocol.
E, 8, 1 8192 When turned on this mode switches the COMM 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
5.5). If not logged on, the only active command is the '?' request for the help screen.
MULTIDROP
PROTOCOL 32 Multidrop protoc ol 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 kno wn as software handshaking.
HARDWARE
HANDSHAKE 8 Enables CTS/RTS style hard wired 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
FIFO2 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 pr ompt when in terminal mode.
1 Modes are listed in the order in which they appear in the
SETUP MORE COMM COM[1 OR 2] MODE menu
2 The default setting for this feature is ON. Do not disable unless instructed to by Teledyne API’s Customer Service
personnel.
06864B DCN6314