DH Instruments PPCK PLUS, Operation And Maintenance Manual

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PPCK+™ Operation and Maintenance Manual
Page 111
©2001 DH Instruments, Inc .
4.5.4 READY STATUS REGISTER
The PPCK+ contains an 8 bit Ready Status Register that reflects specific PPCK+
measurement and generation ready events. Enabled events in this register will set or clear
the RSB bit of the Status Byte Register.
Table 16. 8 Bit Ready Status Register
N/A
(128)
N/A
(64)
N/A
(32)
N/A
(16)
N/A
(8)
MEAS
(4)
NRDY
(2)
RDY
(1)
This register can be read using the “*RSR?” query. Each of these status bits can set the
RSB bit of the Status Byte Register, causing a SRQ to occur IF the RSB bit is enabled to do
so. The Standard Event Status Enable Register (“
∗
RSE” program message ) determines
which of these flags are able to assert the RSB bit. The description of these bits are given
as:
•
MEAS: Measurement ready (Bit 2)
Indicates that the PPCK+ has completed an RPT measurement.
•
NRDY: Generation Not Ready (Bit 1)
Indicates that the PPCK+ made a transition from Ready to Not Ready as defined by the
control settings (see Section 3.1.2.5).
•
RDY: Generation Ready (Bit 0)
Indicates that the PPCK+ has reached a target pressure and is Ready as defined by the
control settings (see Sections 3.1.2.4, 3.1.2.5 and 3.2.3).
4.6 IEEE STD. 488.2 COMMON AND STATUS PROGRAM
MESSAGES
The PPCK+ supports a set of commands that are common to all instruments conforming to
IEEE Std 488.2. These command make it easy to perform basic function for any device that supports
these commands. These command also cover the status reporting commands. See Section 4.5 for
details on the status registers mentioned in these commands.
Table 17. Program Message List
∗
CLS Clear all of the status & event structures
∗
ESE
Read or set the Standard Event Status Enable Register
∗
ESR Read the Standard Event Status Register
∗
IDN Identify the PPCK+ version, range, and serial number
∗
OPC Sets the operation complete bit when all operations have completed
∗
OPT Reads the list of installed PPCK+ options
∗
RST
Resets the PPCK+ control settings to factory settings
∗
TST
Read the power on self test status.
∗
SRE Read or set the Service Request Enable Register
∗
STB Read the Status Byte Register
RSE
Read or set the Ready Status Enable Register
RSR Reads the Ready Status Register