Ametek XEL Serie Mode D'emploi page 36

Remote Local
Parallel Poll
Device Clear
Device Trigger
Controller
Electrical Interface
Query Error Register - GPIB IEEE Std. 488.2 Error Handling
The IEEE 488.2
UNTERMINATED
follows. If the instrument is addressed to talk and the response formatter is inactive and the input
queue is empty then the
be set in the Standard Event Status Register, a value of 3 to be placed in the Query Error
Register and the parser to be reset. See the Status Reporting section for further information.
The IEEE 488.2
INTERRUPTED
send a response message and a
or the input queue contains more than one END message then the instrument has been
and an error is generated. This will cause the Query Error bit to be set in the
INTERRUPTED
Standard Event Status Register, a value of 1 to be placed in the Query Error Register and the
response formatter to be reset thus clearing the output queue. The parser will then start parsing
the next
<PROGRAM MESSAGE UNIT>
further information.
The IEEE 488.2
DEADLOCK
send a response message and the input queue becomes full then the instrument enters the
state and an error is generated. This will cause the Query Error bit to be set in the
DEADLOCK
Standard Event Status Register, a value of 2 to be placed in the Query Error Register and the
response formatter to be reset thus clearing the output queue. The parser will then start parsing
the next
<PROGRAM MESSAGE UNIT>
further information.
GPIB Parallel Poll
Complete parallel poll capabilities are offered on this instrument. The Parallel Poll Enable
Register is set to specify which bits in the Status Byte Register are to be used to form the
message The Parallel Poll Enable Register is set by the *PRE <nrf> command and read by the
*PRE? command. The value in the Parallel Poll Enable Register is ANDed with the Status Byte
Register; if the result is zero then the value of
The instrument must also be configured so that the value of
during a parallel poll operation. The instrument is configured by the controller sending a Parallel
Poll Configure command (PPC) followed by a Parallel Poll Enable command (PPE). The bits in
the PPE command are shown below:
bit 7 = X
bit 6 = 1
bit 5 = 1
bit 4 = 0
bit 3 = Sense
bit 2 = ?
bit 1 = ?
bit 0 = ?
36
RL2
PP1
DC1
DT0
C0
E2
error (addressed to talk with nothing to say) is handled as
error is generated. This will cause the Query Error bit to
UNTERMINATED
error is handled as follows. If the response formatter is waiting to
<PROGRAM MESSAGE TERMINATOR>
from the input queue. See the Status Reporting section for
error is handled as follows. If the response formatter is waiting to
from the input queue. See the Status Reporting section for
is 0 otherwise the value of
ist
don't care
Parallel poll enable
sense of the response bit; 0 = low, 1 = high
bit position of the response
has been read by the parser
local
ist
is 1.
ist
can be returned to the controller
ist