Tektronix PS 5010 User Manual

Programming-PS 501 0
STATUS AND ERROR REPORTING
Through the Service Request function (defined in the
IEEE-488 Standard), the instrument may alert the controller
that it needs service. This service request is also a means of
indicating that an event (a change in status or an error) has
occurred. To service a request the controller performs a
Serial Poll; in response the instrument returns a Status Byte
(STB) which indicates whether it was requesting service or
not. The STB can also provide a limited amount of informa-
tion about the request. The format of the information en-
coded in the STB is given in Fig.
3-3. When data bit 8 is set,
the STB conveys Device Status information which is indicat-
ed by bits
1 through 4.
Because the STB conveys limited information about an
event, the events are divided into classes; the Status Byte
reports the class.
follows:
COMMAND
ERROR
EXECUf ION
ERROR
INTERNAL
ERROR
SYSTEM
EVENTS
EXECUTION
WARNING
DEVICE
STATUS
The classes of events are defined as
lndicates the instrument has received a
command which it cannot understand.
lndicates that the instrument has re-
ceived a command that it cannot ex-
ecute. This is caused by arguments out
of range or settings that conflict.
lndicates that the instrument has de-
tected
a hardware condition or
firmware problem that prevents
operation.
Events that are common to instru-
ments in a system
(e.g., Power on,
User Request, etc.).
The instrument is operating but the
user should be aware of potential
problems.
Device dependent events.
The instrument can provide additional information about
many of the events, particularly the errors reported in the
If 0, STB indicates event class
\-- If 1, STB indicates device status
\
\
\ \--
I if requesting service
\
,- 1 indicates an abnormal event
DECIMAL
ma1 conditions errors and system
Fig.
3-3. Definition of status bytes.
Status Byte. After determining that the instrument request-
ed service (by examining the STB) the controller may re-
quest the additional information by sending an error query
(ERR?). In response, the instrument returns a code which
defines the event. These codes are described in Table
3-1.
REV APR 1982

Tektronix PS 5010 Specifications

General

Brand	Tektronix
Model	PS 5010
Category	Power Supply
Language	English