IEEE 488.2 compatible Status Structures

Status reporting

Status Byte Register - read with *STB?

read by Serial Poll

RQS

0

ESB

MSS

MAV

Comm. PRIM

T.O. ERR

0

SRQ IS

 

read by *STB?

RQS

the IEEE 488.1 Service Request Flag read by Serial Poll.

MSS

the Master Summary Status is generated by performing a bit by bit AND

 

of the Status Byte and the Service Request Enable Register and then

 

ORing the resulting bits.

ESB

the Event Summary Bit generation is described under Standard Event

 

Status Enable Register.

MAV

the Message Available Status Bit is set when there is data in the Output

 

Queue.

Comm. T.O

set when a communication time out event occurs. Cleared when the

 

TORST command is issued.

PRIM_ERR

this is the Primary Status Summary Bit.

SRQ_IS

this is the Channels Events Summary Bit.

Service Request Enable Register - set with *SRE, read with *SRE?

0

0

ESB

MAV

Comm. PRIM

T.O. ERR

0

SRQ IS

The Service Request Enable Register has mask bits at positions corresponding to the status bits of the Status Byte. Unused bits are cleared.

The SRE Register is used for calculating the MSS and RQS flags.

Parallel Poll Enable Register - set with *PRE, read with *PRE?

0

0

ESB

MAV

Comm. PRIM

T.O. ERR

0

SRQ IS

The Parallel Poll Enable Register has mask bits at positions corresponding to the status bits of the Status Byte. Unused bits are cleared.

The PRE Register is used for calculating the IEEE 488.1 IST (Individual Status) message (as read by the Remote Controller during a Parallel Poll).

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XMP 2600 Programming Manual rev. 1.1

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Xantrex Technology XMP 2600 manual Status Byte Register read with *STB?, Primerr