Operating Instructions
Model 300E Carbon Monoxide Analyzer
Instruction Manual
102
P/N 04288 REV: A
6.9.6.
Serial Port Password Security Feature
In order to provide security for applications where the model 300E is being
remotely accessed via a modem or a public telephone line, the LOGON feature can
be set to require a password to before the instrument will accept commands. This
is done by turning on the
SECURITY MODE
(see Section 6.8.4).
Once the
SECURITY MODE
feature is implemented, the COM port has the following
attributes:
13. A password is required before the port will operate.
14. If the port is inactive for 1 hour, it will automatically LOGOFF.
15. Repeated attempts at logging on with incorrect passwords will cause
subsequent logins (even with the correct password) to be disabled for 1 hour.
16. If not logged on, the only command that is active is the '?'.
17. The following messages will be given at logon.
LOG ON SUCCESSFUL - Correct password given
LOG ON FAILED - Password not given or incorrect
LOG OFF SUCCESSFUL - Logged off
To logon to the model 300E analyzer with
SECURITY MODE
feature ON type:
LOGON 940331
940331 is the default password. This password can be changed to any number
from 0 to 999999 by the variable RS232_PASS. To change the password enter the
command:
V RS232_PASS=NNNNNN
Where N is any numeral between 0 and 9.