Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 6: Instrument programming
2651A-901-01 Rev. A / March 2011 6-49
TSP-Link nodes
Each instrument or enclosure (node) attached to the TSP-Link bus must be identified. Identify each
node by assigning a unique TSP-Link node number.
In test script programs, 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:
• 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 instruments (on page 7-
3)).
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].
Connections
Connections for an expanded system are shown in the following figure. As shown, one unit is
optionally connected to the computer using the GPIB, LAN, or RS-232 interface. Details about these
computer communication connections are described in Communications interfaces
(on page 2-73).
As shown, all the units in the system are connected in a sequence (daisy-chained) using LAN
crossover cables.
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