7 status group reporting – BNC 7000 Series Programmer Manual User Manual

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The transition filter is a special register that specifies which types of bit state changes in the condition

detect condition changes from True (1) to False (0); positive transition filters (PTR) are used to detect

condition changes from False (0) to True (1). Setting both positive and negative filters True allows an

event to be reported anytime the condition changes. Transition filters are read-write. Transition filters

are unaffected by queries or *CLS (clear status) and *RST commands. The command

:STATus:PRESet sets all negative transition filters to all 0’s and sets all positive transition filters to all

1’s.

Event Register

The event register latches transition events from the condition register as specified by the transition

filter. Bits in the event register are latched, and once set they remain set until cleared by a query or a

*CLS command Event registers are read only.

Enable Register

The enable register specifies the bits in the event register that can produce a summary bit. The

SERIES 7000 logically ANDs corresponding bits in the event and enable registers, and ORs all the

resulting bits to obtain a summary bit. Summary bits are recorded in the Summary Status Byte. Enable

registers are read-write. Querying an enable register does not affect it. The command

:STATus:PRESet sets the Operation Status Enable register and the Questionable Status Enable

4.7 Status Group Reporting

The state of certain SERIES 7000 hardware and operational events and conditions can be determined

by programming the status system. Three lower status groups provide status information to the

Summary Status Byte group. The Summary Status Byte group is used to determine the general nature

of an event or condition and the other status groups are used to determine the specific nature of the

event or condition.

Summary Status Byte Group

The Summary Status Byte group, consisting of the Summary Status Byte Enable register and the

Summary Status Byte, is used to determine the general nature of an SERIES 7000 event or condition.

The bits in the Summary Status Byte provide the following:

Operation Status Group

The Operation Status group, consisting of the Operation Condition register, the Operation Positive

Transition register, the Operation Negative Transition register, the Operation Event register and the

Operation Event Enable register.

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