Status Register

The internal status register shows the actual status and configuration of the CT-BOX instrument. It is read-only, is read with STATUS:? and is returned as an ASCII hexadecimal value.

The register has the following structure, where bit #32 is the MSB:

Bit #	Bit name	Description
`#1`	ACQ status	Indicates that the unit is acquiring data (see ACQ)
`#2`	Error condition	Indicates that an error occurred; see the Error Register for detailed information
`#3`	Alarm flag	Indicates the alarm flag (see ALARM)
`#4`	Alarm direction	High when an over-current event happened, low in case of an under-current event. Meaningful only if Alarm status is high
`#5`	SD write	Indicates that the SD card is being used for saving the measured data
`#6`	SD mounted	Indicates that the SD card is mounted (see SD)
`#7` – `#12`	Reserved	For internal or future use
`#13`	MODE_MSB	MSB of the MODE setting (see table below)
`#14`	Calibration password	Indicates the status of the PASSWORD setting (`1` = correct password entered, protected commands unlocked; `0` = locked)
`#15`	Reserved	For internal or future use
`#16`	Reserved	For internal or future use
`#17`	MODE_LSB	LSB of the MODE setting (see table below)
`#18` – `#19`	ACQT setting	Indicates the status of the ACQT setting (see table below)
`#20`	Reserved	For internal or future use
`#21`	PRINT setting	Indicates the status of the PRINT setting (`1` = enabled)
`#22`	SAVE setting	Indicates the status of the SAVE setting (`1` = enabled)
`#23`	ALARM setting	Indicates the status of the ALARM setting (`1` = enabled)
`#24`	Trigger setting	Indicates the status of the TRG setting (`1` = enabled, `0` = disabled). When `0`, bits `#25` and `#29` are not meaningful (see table below)
`#25`	TRG_MSB	MSB of the TRG setting (see table below). Meaningful only if bit `#24` is `1`
`#26`	ADC temp OK	The temperature of the CT-BOX is OK
`#27`	DMM_MSB	MSB of the DMM setting (see table below)
`#28`	DMM_LSB	LSB of the DMM setting (see table below)
`#29`	TRG_LSB	LSB of the TRG setting (see table below). Meaningful only if bit `#24` is `1`
`#30` – `#32`	Reserved	For internal or future use

MODE Setting Bits (`#13` & `#17`)

Bit 13	Bit 17	Meaning
`0`	`0`	MODE = OSC
`0`	`1`	MODE = DLOG
`1`	`0`	NOT USED
`1`	`1`	MODE = DMM

ACQT Setting Bits (`#19` – `#18`)

Bit 19	Bit 18	Meaning
`0`	`0`	Optional temperature readings are disabled
`0`	`1`	External temperature sensor readings enabled
`1`	`0`	DCCT temperature readings enabled
`1`	`1`	External temperature and DCCT temperature readings enabled

TRG Setting Bits (`#24`, `#25` & `#29`)

Bit #24 tells whether the trigger is enabled. Only when bit #24 is 1 do bits #25 and #29 give the trigger configuration (IN, OUT or GATE). When bit #24 is 0 the trigger is disabled and bits #25 and #29 carry no information; ignore them.

Bit 24	Bit 25	Bit 29	Meaning
`0`	`x`	`x`	Trigger disabled (bits 25 and 29 ignored)
`1`	`0`	`0`	Trigger enabled, TRG:IN
`1`	`0`	`1`	Trigger enabled, TRG:GATE
`1`	`1`	`0`	Trigger enabled, TRG:OUT
`1`	`1`	`1`	NOT USED

DMM Setting Bits (`#27` – `#28`)

Bit 27	Bit 28	Meaning
`0`	`0`	NOT USED
`0`	`1`	DMM:DC
`1`	`0`	DMM:AC
`1`	`1`	DMM:ACDC

Example:

The read value 0X00110001 indicates that the ACQ status is enabled (bit #1 is 1), the mode of operation is data-logger (bit #17 is 1 and bit #13 is 0) and the printing is enabled (bit #21 is 1):

STATUS:?
0X00110001