Teledyne 300M instruction manual 7 RS-232COMMUNICATIONS, 1 RS-232Port Setup - Front Panel

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A

7 RS-232 COMMUNICATIONS

The Model 300M features a powerful RS-232 interface that is used both for reporting test results and for controlling the analyzer from a host computer. Because of the dual nature of the RS-232 interface, the message format has been carefully designed to accommodate both printers and host computers.

Setup from the Front Panel

There are 2 additional RS-232 setups that can be done via the front panel.

1.Set the Instrument ID number by SETUP-MORE-COMM-ID, and enter a 4 digit number from 0000-9999. This ID number is part of every message transmitted from the port.

2.Set the RS-232 mode bit field in the VARS menu. To get to the variable press, SETUP- MORE-VARS-ENTR and scroll to RS232_MODE, then press EDIT. The possible values are:

Table 7-1: RS-232 Port Setup - Front Panel

Decimal Value	Description
1	Turns on quiet mode (messages suppressed)
2	Places analyzer in computer mode (no echo of chars)
4	Enables Security Features (Logon, Logoff)
8	Enables RS-232 menus display on M300M front panel display
16	Enables alternate protocol and setup menu
32	Enables multi-drop support for RTS

NOTE

To enter the correct value, add the decimal values of the features you want to enable. For example if logon and front panel RS-232 menus were desired the value entered would be 4 + 8 = 12.

All message outputs from the Model 300M have the following format:

X DDD:HH:MM IIII MESSAGE<CRLF>

The "X" is a character indicating the message type (see Table 7-2).

7-1