Associated Research OMNIA II 8204, Operation And Service Manual

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142
COMMAND NAME TEST TYPES VALUE
EPM n, n=1-3
EPM? Edit PLC
Memory Send RUN
LCT 1=M1, 2= M2, 3=M3
The ADD command can also be used. The memory selection should be inserted
as the last parameter and should use full text as indicated on the LCD screen
such as M1 or M2.
05 Omnia to APT 7 Memory (Models 8206, 8207, 8256, 8257)
This option provides a dedicated signal output connector that is added to the rear
panel of the LCT card. The new signal output connector can be used to control a
compatible device such as an Associated Power Technologies (APT) AC power
source. The output is a 3-bit digital control signal that is menu selectable at the
Run Test or LCT parameter screen.
This option is provided with a cable which is designed to interconnect the OMNIA
II LCT card 9-pin output to the APT power source Remote I/O input. This cable,
part number 38772, is a standard 9-pin female to 9-pin male.
When using this option with an APT power source, be sure to power up the
OMNIA II first and then power up the APT power source. When powering down
the instruments, power down the APT power source first and then power down
the OMNIA II. The OMNIA II is in an undetermined state without power and may
cause inadvertent memory activation of the APT power source. If you would like
to operate the APT power source independently of the OMNIA II, either
disconnect the interface cable or disable the PLC remote on the APT power
source.
The Remote Memories send signals are provided by three high voltage, high
current Darlington drivers. These are open collector devices capable of sinking
350mA at voltages as high as 95 VDC.
With this option installed, a new soft key selection will appear on the Run Test or
LCT parameter screen. In the LCT parameter screen it will be necessary for you
to press the “More” soft key to access the PLC control parameter. The new soft
key, called PLC Control will toggle between M1 through M7 when pressed.
Setting the PLC Control selection to M1 through M7 will create different digital
states at Bit 0, Bit 1, and Bit 2 of the PLC Remote Signal Output (refer to the PLC
Signal Output drawing below). The different states are described in the truth table
below.
The “Not used” state is undefined and cannot be programmed for use. A
Reset Out signal is also available to allow the user to be able to reset the APT
source during or at the end of a test. The Reset Out signal will not be sent
automatically to the APT source. Either the Reset button on the Omnia 2 will
need to be pressed or a Bus Reset command will need to be sent to the Omnia 2
for it to be able to send a Reset Out signal to the APT source.