Reading Registers; Common Commands - Keithley S46 Instruction Manual

S46/S46T Microwave Switch System Instruction Manual

Reading registers

Any register in the status structure can be read by using the appropriate query (?)
command. The specific query commands are covered later in this section (see
The response message to the query command is a decimal value. To determine which bits
in the register are set, convert that decimal value to its binary equivalent. For example, the
binary equivalent of decimal 48 is 110000. This binary value indicates that bits B5 and B4
are set.

Common commands

NOTE
Common commands are device commands that are common to all devices on the bus.
These commands are designated and defined by the IEEE-488.2 standard. Common
commands are listed in
Table 3-8
IEEE-488.2 common commands and queries
Mnemonic Name
*CLS Clear status
*ESE <NRf> Event enable command
*ESE? Event enable query
*ESR? Event status register query
*IDN? Identification query
*OPC Operation complete command Set the operation complete bit in the standard event register
*OPC? Operation complete query
*RST Reset command
*SRE<NRf> Service request enable
command
*SRE? Service request enable query
*STB? Status byte query
*TST? Self-test query
*WAI Wait-to-continue command
Each common command is preceded by an asterisk (*).
Table 3-8.
Description
Clear the standard event register and error queue.
Program the standard event enable register.
Read the standard event enable register.
Read the standard event enable register and clear it.
Returns the manufacturer, model number, serial number,
Places an ASCII "1" into the output queue when all pending
Returns the relay unit to the *RST default condition.
Programs the service request enable register.
Reads the service request enable register.
Reads the status byte register.
Performs a checksum test on ROM and returns the result.
Wait until all previous commands are executed.
and firmware revision levels of the unit.
after all pending commands have been executed.
selected device operations have been completed.
Operation
Table
S46-901-01 Rev. C / January 2006
3-23
3-8).