Measurement Computing Micro 488/EX rev.2.1 - Manual (Page 42)

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 UNCONFIGDisable 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.