DH Instruments PPC4, Operation And Maintenance Manual

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PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 180
∗
RST
Purpose Resets the PPC4 control settings to factory settings.
Command
“
∗
RST””
Remarks This Command sets the PPC4 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 3.5.4.1, 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 PPC4. 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 PPC4 system memory stores the user settings (units, resolution, generation settings)
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 PPC4
passed the test on power-up OR if the
∗
TST query was used at least once since the PPC4
was powered up the reply will be a ‘0’.
Example
(enhanced)
Sent:
Reply:
“
∗
RST?”
“1”
*RSE
Purpose Read or set the Ready Status Enable Register.
Command
Query
“RSE n ”
“RSE?”
Default “RSE 0”
Arguments n: ’0 to 255’ This is the decimal representation of the bit(s) to enable. To enable
the RDY bit, the argument would be 1.
Remarks The Ready Status Enable Register determines which bits in the Ready Status Register are enabled
and included in the Status Byte Register (RSR bit), and can assert the SRQ line. The reply is in
decimal numeric form.
Example
(enhanced)
Sent:
Query reply:
“
∗
RSE=1” (enables the RDY bit)
“1” (no reply if IEEE-488)
Errors ERR# 6: n is not valid.