PSI BOX PLUS+ Reference
Control Functions
IFC.
Pulse The IFC Line.
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Purpose.
To cause the PSI BOX to momentarily assert the
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IFC, InterFace Clear, line.
This command will prevent any data transfer between two
device continuing. All devices are untalked and unlistened so
causing all IEEE bus activity to stop immediately.
Good to use IFC or ABORT shortly after power on as the
first IEEE bus command so that the IEEE bus devices are put
into a known state.
The IFC command is usually issued when you power your PSI
BOX up or, at a subsequent time, when you want to initialise
the IEEE bus devices to their power on state.
Format.
IFC
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Params.
None.
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Returns.
None.
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Example.
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_
BUS IFC
:REM RESET BUS
Bus Activity.
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_
pulse IFC true for approx 100 micro seconds.
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Chapter 8