KEPCO TMA VXI-27 - Manual (Page 24)

TMA VXI -27 101602
3-7
BYTE AVAILABLE Sends SCPI or CIIL commands to the TMA VXI-27. Also used to send
IEEE 488.2 common commands.
NO YES
BYTE AVAILABLE + END Same as BYTE AVAILABLE except that bit 8 (END) is set to identify
the byte as the last byte of the message.
NO YES
BYTE REQUEST Reads responses from commands previously sent to the TMA VXI-27. NO YES
CLEAR Causes the TMA VXI-27 to clear its internal buffers and reset the VXI
error.
YES NO
CONTROL EVENT Causes the TMA VXI-27 to selectively enable or disable the genera-
tion of a specific event. The TMA VXI-27 can generate two events,
REQUEST TRUE and REQUEST FALSE. After power up, these
events are both enabled (in accordance with the VXI Specification).
The REQUEST TRUE event is sent when the TMA VXI-27 requires
service from its commander (the SERVICE REQUEST bit from the
status byte goes TRUE and the EVENTS AS INTERRUPT and
REQUEST TRUE FLAG are enabled).
The REQUEST FALSE event is sent by the TMA VXI-27 when it no
longer requires service from its commander (the SERVICE REQUEST
bit from the status byte goes FALSE and the EVENTS AS INTER-
RUPT and REQUEST FALSE FLAG are enabled).
YES NO
CONTROL RESPONSE Implemented; however, since the TMA VXI-27 does not generate
response signals or response interrupts, any attempt to enable
responses will generate an error.
YES NO
END NORMAL
OPERATION Causes the TMA VXI-27 to end the normal operation and to go back to
the CONFIGURE sub-state. This command will report an error (7 in
the STATUS FIELD) if the device was already in the configure state
when the command was issued.
YES NO
READ INTERRUPTER
LINE Used to determine the VXIbus IRQ line assigned to the TMA VXI-27
interrupter. The default value is 0 which means NO INTERRUPTS.
YES NO
READ INTERRUPTERS Used to determine the number of interrupters within a SERVANT
device. The TMA VXI-27 has only one interrupter, therefore 1 will be
returned in the answer word. This result will be used in the next com-
mand (READ INTERRUPTER LINE) in which the commander can
interrogate the TMA VXI-27 to determine which IRQ line is connected
to this interrupter.
YES NO
READ PROTOCOL Used to determine what protocols, in addition to the Word Serial Pro-
tocol, the TMA VXI-27 supports. This is usually the first command sent
by the Resource Manager after power up and determines all subse-
quent commands issued to the device. The TMA VXI-27 response to
this command is 8623 Hex which means that it is capable of Event
Generation, that it has a Programmable Interrupter (which means it
supports the Read Interrupters, Read Interrupter Line, and Assign
Interrupter Line commands), that it supports Word Serial TRIGGER
command and that it also supports the VXIbus Instrument Protocol as
an I4 class Instrument.
YES NO
TABLE 3-2. VXI BUS COMMANDS (CONTINUED)
VXI Command Description
TMA VXI-27
Responds if active
substate is:
Configure
Normal
Operation