12713020-003-2 Revision F.01 – January 2007 SSU-2000 Technical Reference 27
Chapter 2 TL1 Reference
TL1 Command and Response Conventions
S placeholder to indicate Shelf number
x SSU-2000 main (1) or expansion shelf (2-5) number
A placeholder to separate the shelf number form the slot position
y SSU-2000 slot position (1-16)
z port number (1-20)
ALL all modules or ports to which the command applies
Specify multiple aids using the ampersand (&)
Use a single ampersand (&) to indicate aid1 and aid2
Use a double ampersand (&&) to indicate a range from aid1 to aid2
The y or z part of the aid also uses the ampersand (&)
ctag (Correlation Tag) field is a six-digit alpha-numeric message identifier code
that is received with the command and returned in the response, for correlation of
message and response within the operating system. The ctag can be any
combination of six alpha-numeric characters randomly generated by the user.
gb (General Block) is an field that is not used by the SSU-2000 but that you must
indicate by a double colon, that is, by preceding any parameters following the
ctag field with double colons (::).
other is a field that is used for commands that require other information. The
format for this field is specified in the individual command descriptions.
In-Process Acknowledgment Response Message Conventions
Each command received by the SSU-2000 with a valid tid generates a response
when the terminating semicolon is received, followed by an output response
message or the output response.
The SSU-2000 sends the in-process acknowledgment (IP) only if it is unable to
respond to the command within two seconds. The requested response is then sent
in full when the SSU-2000 data is available.
The in-process acknowledgment response always begins with a carriage return and
two line feed characters, and ends with the header line containing the source
identifier (sid), defined below, and the date^time stamp.
The format for the IP acknowledgment message is:
<cr lf lf>
^^^sid^date^time <cr lf>
IP^ctag <cr lf>
<
where:
sid (Source Identifier) is the returned ID, and is the same as the tid in the input
command message to which the IP acknowledgment is responding.
date is the current year, month, and day in the SSU-2000 in the format:
YY-MM-DD.
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