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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 102
∗IDN
Purpose Identify the RPM4 version, range, and serial number.
Query
“∗IDN?”
Remarks The identification reply is made up of the manufacture, the model, the serial number and the
software version. Each is separated by a comma.
Example
(enhanced)
Sent:“∗IDN?”
Reply:“DH INSTRUMENTS INC, RPM4 A0100/A0015, 1234, Ver2.00 -dhf”
∗OPC
Purpose Sets the operation complete bit when all operations have completed.
Command
Query
“∗OPC”
“∗OPC?”
Remarks This Command enables the RPM4 to set the OPC bit in the Standard Event Status Register
when it has completed all pending functions.
The Query replies with a “1” when all functions are complete.
Example
(enhanced)
Sent:
Query reply:
“∗OPC”
“1”
∗OPT
Purpose Reads the list of installed RPM4 options.
Query
“∗OPT?”
Remarks This Query returns any registered option(s) installed in the RPM4. Each option is separated
by a comma. Possible options:
“IEEE-488:0”
The IEEE-488 option is installed,
Example
(enhanced)
Sent:
Reply:
“∗OPT?”
“IEEE-488:0”
∗RST
Purpose Resets the RPM4 settings to factory settings.
Command
“∗RST””
Remarks This Command sets the RPM4 settings to factory settings. This equivalent to a front panel
executed RESET/SET. This does not affect the communications settings.
Example
(enhanced)
Sent:
Reply:
“∗RST”
“∗RST” (no reply if IEEE-488)
See Also Section 3.5.9.1, Reset – Sets
∗SRE
Purpose Read or set the Service Request Enable Register.
Command
Query
“∗SRE n”
“∗SRE?”
Default
“∗SRE 0”
Arguments
n:
’0 to 255’ This is the decimal representation of the bit(s) to enable. To allow the
MAV and ESB bits to assert the SRQ line, the argument would be 32 + 16 = 48.
Bit 6 (64) is reserved and cannot be set.
Remarks The Service Request Enable Register determines which bits of the Status Byte can set the MSS
bit of the Status Byte and request service by asserting the SRQ line of the IEEE-488 interface.
Example
(enhanced)
Sent:
Query reply:
“∗SRE=48” (enables the MAV and ESB bits)
“48” (no reply if IEEE-488)
Errors ERR# 6: n is not valid.
∗STB
Purpose Read the Status Byte Register.
Command
“∗STB?”
Remarks The Status Byte Register reflects the general status of the RPM4. The ‘MSS’ bit state is
represented by bit 6.
Example
(enhanced)
Sent:
Reply:
“∗STB?”
“80” (The MSS and MAV bits are set)
∗TST
Purpose Read the power on self test status.
Query
“∗TST?””
Remarks The RPM4 system memory stores the user settings (units, resolution) and retains them when
the unit if OFF. On power-up, this memory is checked. If this memory is corrupted, all user
settings are reset to default (as if the “∗RST” program message was executed), and the ∗TST
query will return a non zero value. If the RPM4 passed the test on power-up OR if the ∗TST
query was used at least once since the RPM4 was powered up the reply will be a ‘0’.
Example
(enhanced)
Sent:
Reply:
“∗RST?”
“1”