VXi VT1422A 사용자 설명서
146 Programming the VT1422A for Data Acquisition and Control
Configuring the
Enable Registers
In Figure 4-10, note that each Status Group has an Enable Register. These
control whether or not the occurrence of an individual status condition will
be reported by the group’s summary bit in the Status Byte.
control whether or not the occurrence of an individual status condition will
be reported by the group’s summary bit in the Status Byte.
Questionable Data Group Examples
To have only the "FIFO Overflowed" condition reported by the QUE bit
(bit 3) of the Status Byte, execute:
(bit 3) of the Status Byte, execute:
STAT:QUES:ENAB 1024
1024=decimal value for bit 10
To have only the "FIFO Overflowed" and "Setup Changed" conditions
reported, execute:
reported, execute:
STAT:QUES:ENAB 9216
9216=decimal sum of values for
bits 10 and 13
bits 10 and 13
Operation Status Group Examples
To have only the "FIFO Half Full" condition reported by the OPR bit (bit 7)
of the Status Byte, execute:
of the Status Byte, execute:
STAT:OPER:ENAB 1024
1024=decimal value for bit 10
To have only the "FIFO Half Full" and "Scan Complete" conditions
reported, execute:
reported, execute:
STAT:OPER:ENAB 1280
1280=decimal sum of values for
bits 10 and 8
bits 10 and 8
Standard Event Group Examples
To have only the "Query Error", "Execution Error," and "Command Error"
conditions reported by the ESB bit (bit 5) of the Status Byte, execute:
conditions reported by the ESB bit (bit 5) of the Status Byte, execute:
*ESE 52
52=decimal sum of values for
bits 2, 4, and 5
bits 2, 4, and 5
Reading the Status
Byte
To check if any enabled events have occurred in the status system, first read
the Status Byte using the *STB? query. If the Status Byte is all zeros, there is
no summary information being sent from any of the status groups. If the
Status Byte is other than zero, one or more enabled events have occurred. The
Status Byte bit values are interpreted and act as follows:
the Status Byte using the *STB? query. If the Status Byte is all zeros, there is
no summary information being sent from any of the status groups. If the
Status Byte is other than zero, one or more enabled events have occurred. The
Status Byte bit values are interpreted and act as follows: