TAMS 1800 Series, Руководство по установке и эксплуатации, Страница: 14 / 28

These A-Common pins are all connected to a ground plane that runs beneath all the
signal paths on the circuit board. This ground plan is also connected to the rear “Analog
Bus” A-Common connections.
This A-Common signal is completely isolated from the PC/USB ground.
Writing test programs
There are a number of ways to write a test program to control the TAMS 1800 Series
Switches. They provide trade-offs in throughput, features, and integration into your
existing test programming environment.
Direct IO
Direct IO is the fastest method of controlling the switch, and it allows the most flexible
access to all features of the switch. Direct IO requires using an IO library such as VISA
or SICL, available from NI or Agilent. Applications like NI LabVIEW and Agilent VEE
also support Direct IO.
The SCPI (Standard Commands for Programmable Instruments) and IEEE 448.2
commands are used to control the switch, providing some compatibility and familiarity if
you have experience with other switch products.
The basic commands are OPEN, CLOSE, and OPEN ALL. For example,
OPEN (@1) -- open relay number 1
OPEN (@1:5) -- open relays 1, 2, 3, 4, and 5
OPEN (@1, 2, 3, 10:15, 60)
-- open relays 1, 2, 3, 10, 11, 12, 13, 14, 15, and 60
CLOSE (@1) -- close relay number 1
CLOSE (@1:5) -- close relays 1, 2, 3, 4, and 5
CLOSE (@1, 2, 3, 10:15, 60)
-- close relays 1, 2, 3, 10, 11, 12, 13, 14, 15, & 60
OPEN ALL -- open every relay on the device
The OPEN and CLOSE commands reference relay numbers, not pin or terminal numbers.
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