Opc/  Opc? Command/Query (Operation Complete); Wai Command (Wait); Cls Command (Clear Status) - Iwatsu VOAC760 Manual

3.4.5  OPC/  OPC? command/query (Operation Complete)
When this instrument receives the  OPC command, it sets the operation completion message (OPC
bit) of the standard event status register to "1" after the operation of the instruments, which are
specified by commands and queries sent before this command, has been completed.
In the case of a query, when an instrument operation that was specified by a command or
query prior to this command is fully completed, ASCII character 1 is stored in the output
queue (is not set to standard event status register).
Command syntax
 OPC
Query syntax
 OPC?
Response message 1
The response message is "1" in the <NR1 NUMERIC RESPONSE DATA> format.
3.4.6  WAI command (Wait)
The  WAI command holds the execution of subsequent commands and queries until the operation of
the instruments, which are specified by commands and queries sent before this command, has been
completed.
Command syntax
 WAI
3.4.7  CLS command (Clear Status)
The  CLS command clears both the standard event status register and instrument specific event
register of this instrument. Additionally, this command clears the summery bit in the status byte
register influenced by the contents of these registers and queues.
Command syntax
 CLS
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