2606B System SourceMeter® Instrument Reference Manual
Section 3: Functions and features
2606B-901-01 Rev. B / May 2018
3-83
TSP-Link trigger lines
The 2606B has three trigger lines that you can use for triggering, digital I/O, and to synchronize
multiple instruments on a TSP-Link
®
network.
The TSP-Link
®
trigger lines are built into the TSP-Link connection. Use the TSP-Link connectors on
the front of the 2606B. If you are using a TSP-Link network, you do not have to modify any
connections. See
TSP-Link system expansion interface
(on page 6-46) for detailed information about
connecting to the TSP-Link system.
Each trigger line is an open-drain signal. When using the TSP-Link trigger lines for digital I/O, any
node that sets the programmed line state to zero (0) causes all nodes to read 0 from the line state.
This occurs regardless of the programmed line state of any other node. Refer to the table in the
(on page 3-80) topic for digital bit weight values.
Remote TSP-Link trigger line commands
Commands that control and access the TSP-Link
®
trigger line port are summarized in the following
table. See the
(on page 7-1) for complete details on these commands. See
the table in
(on page 3-80) for the decimal and hexadecimal values used to
control and access the digital I/O port and individual lines.
Use the commands in following table to perform basic steady-state digital I/O operations; for example,
you can program the 2606B to read and write to a specific TSP-Link trigger line or to the entire port.
The TSP-Link trigger lines can be used for both input and output. You must write a 1 to all TSP-Link
trigger lines that are used as inputs.
Remote trigger line commands
Command
Description
tsplink.readbit(
bit
)
Reads one digital I/O input line.
tsplink.readport()
Reads the digital I/O port.
tsplink.writebit(
bit, data
)
Writes data to one digital I/O line.
tsplink.writeport(
data
)
Writes data to the digital I/O port.
tsplink.writeprotect =
mask
Sets write-protect mask of the digital I/O port.
Programming example
The programming example below illustrates how to set bit B1 of the TSP-Link digital I/O port high,
and then read the entire port value:
tsplink.trigger[1].mode = tsplink.TRIG_BYPASS
-- Set bit B1 high.
tsplink.writebit(1, 1)
-- Read I/O port.
data = tsplink.readport()
