HP Sander 16500C Key Features, LCL remote to local, MSB module summary bit, Operation Complete

Example

Status Reporting

Key Features

LCL - remote to local

Indicates whether a remote to local transition has occurred.

MSB - module summary bit

Indicates that an enable event in one of the module Status registers has occurred.

Key Features

A few of the most important features of Status Reporting are listed in the following paragraphs.

Operation Complete

The IEEE 488.2 structure provides one technique that can be used to find out if any operation is finished. The *OPC command, when sent to the instrument after the operation of interest, will set the OPC bit in the Standard Event Status Register. If the OPC bit and the RQS bit have been enabled, a service request will be generated. The commands that affect the OPC bit are the overlapped commands.

OUTPUT XXX;"*SRE 32 ; *ESE 1" !enables an OPC service request

Status Byte

The Status Byte contains the basic status information which is sent over the bus in a serial poll. If the device is requesting service (RQS set), and the controller serial-polls the device, the RQS bit is cleared. The MSS (Master Summary Status) bit (read with *STB?) and other bits of the Status Byte are not be cleared by reading them. Only the RQS bit is cleared when read.

The Status Byte is cleared with the *CLS common command.

7–6