Checking 5080A Status; Serial Poll Status Byte (Stb) - Fluke 5080A Operator's Manual

Checking 5080A Status

The programmer has access to status registers, enable registers, and queues in the
Calibrator to indicate various conditions in the instrument as shown in Figure 5-2. Some
registers and queues are defined by the IEEE-488.2 standard. The rest are specific to the
Calibrator. In addition to the status registers, a 16-element buffer called the Error Queue
provides status information. Table 5-5 lists the status registers and gives the read/write
commands and associated mask registers.
Status Register

Serial Poll Status Byte (STB)

Service Request Enable Register (SRE)
Event Status Register (ESR)
Event Status Enable Register (ESE)
Instrument Status Register (ISR)
Instrument Status Change Register (ISCR)
ISCR 1 to 0 transition
ISCR 0 to 1 transition
Instrument Status Change Enable Register (ISCE)
ISCE 1 to 0 transition
ISCE 0 to 1 transition
Each status register and queue has a summary bit in the Serial Poll Status Byte. Enable
registers are used to mask various bits in the status registers and generate summary bits in
the Serial Poll Status Byte. For RS-232 interface operation, the SRQSTR string is sent
over the serial interface when the MSS bit is set. (See the SRQSTR command description
in Chapter 6 for more information.)

Serial Poll Status Byte (STB)

The Calibrator sends the serial poll status byte (STB) when it responds to a serial poll.
This byte is cleared (set to 0) when the power is turned on. The STB byte is defined as
shown in Figure 5-4. If you are using the RS-232 as the remote control interface,
transmitting the ^P character (in the Terminal mode, hold down the <Cntl> key and press
P) returns the SPLSTR (Serial Poll String) and the status byte. Refer to the *STB
command, and for RS-232 interface operation, the SPLSTR and SPLSTR? commands, in
Chapter 6 for more information.
Table 5-5. Status Register Summary
Remote Operations

Checking 5080A Status

Read Write
Command Command
*STB? ⎯
*SRE? *SRE
⎯
*ESR?
*ESE? *ESE
⎯
ISR?
⎯
ISCR?
ISCR0? ⎯
⎯
ISCR1?
ISCE? ISCE
ISCE0? ISCE0
ISCE1? ISCE1
5
5-17