Communications Teledyne API T703/T703U Calibrator Operation Manual
104
General Message Format 5.1.7.5.
All messages from the instrument (including those in response to a command line
request) are in the format:
X DDD:HH:MM [Id] MESSAGE<CRLF>
Where:
X is a command type designator, a single character indicating the
message type, as shown in the Table 6-27.
DDD:HH:MM is the time stamp, the date and time when the message was
issued. It consists of the Day-of-year (DDD) as a number from 1
to 366, the hour of the day (HH) as a number from 00 to 23, and
the minute (MM) as a number from 00 to 59.
[ID] is the calibrator ID, a number with 1 to 4 digits.
MESSAGE is the message content that may contain warning messages, Test
Functions, variable values, etc.
<CRLF> is a carriage return / line feed pair, which terminates the message.
The uniform nature of the output messages makes it easy for a host computer to
parse them into an easy structure. Keep in mind that the front panel display does
not give any information on the time a message was issued, hence it is useful to
log such messages for trouble-shooting and reference purposes. Terminal
emulation programs such as HyperTerminal can capture these messages to text
files for later review.
COM Port Password Security
5.1.7.6.
In order to provide security for remote access of the T703, a LOGON feature can
be enabled to require a password before the instrument will accept commands.
This is done by turning on the SECURITY MODE (Mode 4, Section 5.1.4).
Once the SECURITY MODE is enabled, the following items apply.
A password is required before the port will respond or pass on commands.
If the port is inactive for one hour, it will automatically logoff, which can also
be achieved with the LOGOFF command.
Three unsuccessful attempts to log on with an incorrect password will cause
subsequent logins to be disabled for 1 hour, even if the correct password is
used.
If not logged on, the only active command is the '?' request for the help
screen.
The following messages will be returned at logon:
LOGON SUCCESSFUL - Correct password given
LOGON FAILED - Password not given or incorrect
LOGOFF SUCCESSFUL - Connection terminated successfully
To log on to your calibrator with SECURITY MODE feature enabled, type:
LOGON 940331
940331 is the default password. To change the default password, use the variable
RS232_PASS issued as follows:
V RS232_PASS=NNNNNN
Where N is any numeral between 0 and 9.
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