Series 2600 System SourceMeters Reference Manual Instrument Control Library 12-5
Return to Section 12 topics 2600S-901-01 Rev. A / May 2006
TSP-Link nodes
Each instrument or enclosure attached to the TSP-Link bus must be uniquely
identified. This identification is called a TSP-Link node number and the enclosures
are called nodes. Each node must be assigned a unique node number.
From a TSP point of view, nodes look like tables. There is one global table named
node that contains all the actual nodes that are themselves tables. An individual
node is accessed as
node[N] where N is the node number assigned to the node.
Each node has certain attributes that can be accessed as elements of its
associated table. These are listed as follows:
id The node number assigned to the node.
model The product model number string of the node.
revision The product revision string of the node.
serialno The product serial number string of the node.
There is also an entry for each logical instrument on the node (see “Logical instru-
ments”).
It is not necessary to know the node number of the node running a script. The
variable
localnode is an alias for the node entry the script is running on. For
example, if a script is running on node 5, the global variable
localnode will be an
alias for
node[5].
Logical instruments
You would normally refer to all instrumentation within one enclosure or node as a
single instrument. From an TSP/ICL point of view, it is useful to think of individual
SMUs as instruments. To avoid confusion, SMUs and other subdivisions of the
instrumentation within an enclosure will be referred to as “logical instruments.”
Each logical instrument is given a unique identifier in a system. These identifiers
are used as part of all ICL function calls that control a given logical instrument. A
Series 2600 SMU has the following logical instruments per enclosure:
beeper errorqueue smua status
digio gpib smub tsplink
display serial timer
Logical instruments also look like TSP tables. In addition to the logical-instrument-
specific attributes and the commands to which they respond, there are a few
attributes that provide information about the logical instrument. These attributes
are listed below:
name A string that represents the logical instrument’s name. For example,
smua.
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