Chroma 66203, User Manual

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Status Reporting
6-5
EXE 4 16
Execution Error
. A command parameter was out of the legal
range or inconsistent with the electronic load’s operation, or the
command could not be executed due to some operating
conditions.
CME 5 32
Command Error
. A syntax or semantic error has occurred, or the
electronic load has received a <GET> message from program.
6.2.6 Status Byte Register
■
The Status Byte register summarizes all of the status events for all status registers.
Table 6-4 describes the status events that are applied to the electronic load.
■
The Status Byte register can be read with a serial of pull or *STB? query.
■
The RQS bit is the only bit that is automatically cleared after a serial of pull.
■
When the Status Byte register is read with a *STB? query, Bit 6 of the Status Byte
register will contain the MSS bit. The MSS bit indicates that the load has at least one
reason for requesting service. *STB? does not affect the status byte.
■
The Status Byte register is cleared by *CLS command.
Table 6-4 Bit Description of Status Byte
Mnemonic Bit Value Meaning
CSUM 2
4
Channel Summary
. It indicates if an enabled channel event has
occurred. It is affected by Channel Condition, Channel Event and
Channel Summary Event registers.
QUES
3 8
Questionable
. It indicates if an enabled questionable event has
occurred.
MAV
4 16
Message Available.
It indicates if the Output Queue contains
data.
ESB
5 32
Event Status Bit
. It indicates if an enabled standard event has
occurred.
RQS/MSS
6 64
Request Service/Master Summary Status
. During a serial of pull,
RQS is returned and cleared. For a *STB? query, MSS is
returned without being cleared.
6.2.7 Service Request Enable Register
The Service Request Enable register can be programmed to specify the bit in the Status Byte
register that will generate the service requests.