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Section 5
OM6530-C1-00
19 November, 2019
5-18
Table 5-5 : Event Status Register
5.6.5.
*IDN? - IDENTIFICATION QUERY
This command causes the 6530 to reply with an identification string. The identification
string is built up of four (4) fields delimited by commas (,). The first field is the
manufacturer (i.e. Guildline Instruments), the second field is the model (i.e. 6530), the
third field is the serial number (i.e. 55065), and the final field is the firmware revision
(i.e. E). A typical response might read:
Guildline Instruments, 6530, 55065, E
5.6.6.
*OPC - OPERATION COMPLETE
This command will cause the 6530 to set the Operation Complete bit (bit 0) in the Event
Status Register. Since the 6530 processes all commands sequentially, the operation
complete bit will be set as soon as the command is parsed.
5.6.7.
*OPC? - OPERATION COMPLETE QUERY
This query will place a numeric 1 in the output buffer indicating that all pending
operations are complete.
Bit Location
Name
Description
0
LSB
OPC
OPeration Complete. This event bit is generated in response to
the *OPC or *OPC? command. It indicates that the 6530 has
completed any pending operations and that the parser is ready to
accept more program messages.
1
RQC
ReQuest Control. This event bit indicates to the GPIB controller
that the 6530 is requesting permission to become the controller in
charge. The 6530 will never set this bit.
2
QYE
QuerY Error. This bit indicates that an attempt is being made to
read data from the output queue when no output is either present
or pending, or that data in the output queue has been lost (queue
over-flow). See also GPIB Deadlock.
3
DDE
Device Dependent Error. Not Used.
4
EXE
EXecution Error. Set when (1)a program data element is
evaluated to be outside the legal input range or is inconsistent
with the 6530's capabilities, (2)a valid program message could
not be properly processed.
5
CME
CoMmand Error. Set when (l)a syntax error has been detected by
the parser, (2)a semantic error has occurred indicating that an
unrecognized header has been received, (3)A Group Execute
Trigger was entered into the input buffer inside a program
message.
6
URG
User Request. Set when any key is depressed on the 6530
keyboard.
7
MSB
PON
Power ON. This bit is set after the 6530 is powered up.