Measurement-computing Micro 488/EX rev.2.1 Uživatelský manuál Strana 42

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Section 3 IEEE Operating Modes
3.8
LOCAL
Send Go To Local to selected devices.
LOCAL
LOCKOUT
Prevent local (front-panel) control of bus devices.
CLEAR
Clear all or selected devices.
TRIGGER
Trigger selected devices.
ENTER
Receive data from a bus device.
OUTPUT
Send data to bus devices.
PASS
CONTROL
Give up control to another device which becomes the Active
Controller.
SPOLL
Serial Poll a bus device, or check the Service Request state.
PPOLL
Parallel Poll the bus.
PPOLL
CONFIG
Configure Parallel Poll responses.
PPOLL
DISABLE
Disable the Parallel Poll response of selected bus devices.
PPOLL
UNCONFIG
Disable the Parallel Poll response of all bus devices.
SEND
Send low-level bus sequences.
RESUME
Unassert Attention. Used to allow Peripheral-to- Peripheral
transfers.
3.7 Controller Pass-Thru Mode
This mode is intended to provide bi-directional data transparent conversion
between an RS-232/RS-422 host computer and an IEEE 488 peripheral, such as a
printer or a HPIB plotter. The operation of this mode is covered in Section 6 of this
manual.
3.8 Peripheral Pass-Thru Mode
This mode is intended to provide bi-directional data transparent conversion
between an IEEE 488 controller and a serial device. This Peripheral Pass-Thru mode
does not require the serial device to control data to it. The is no command line parser
and, therefore, requires no serial commands. This mode of operation is described in
Section 7 of this manual.
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