System:preset; System:time; System:error[:Next]; System:error:count - Keysight N774 C Series Programming Manual

3 Instrument Setup and Status
Parameters: 24-hour time format: hours (0-23), minutes (0-59), seconds (0-59)
Response: none
Example: :syst:time 20,15,30
Command:

:SYSTem:TIME?

Syntax: :SYSTem:TIME?
Description: Returns the instrument's internal time.
Parameters: none
Response: The time in the format hour, minute, second. Hours are counted 0...23 (24 hour time format).
Example: :syst:time?
Command:

:SYSTem:ERRor[:NEXT]?

Syntax: :SYSTem:ERRor[:NEXT]?
Description: Returns the next error from the error queue.
Parameters: none
Response: The number of the latest error, and its meaning.
Note: Every connection uses its own error queue
Example: :syst:err? -> -113,"Undefined header"
Command:

:SYSTem:ERRor:COUNt?

Syntax: :SYSTem:ERRor:COUNt?
Description: Returns the total no. of errors.
Parameters: none
Response: The total count of errors.
Example: :syst:err:coun? -> 20
44
->
+20,+15,+30
Keysight N774xC Series Multiport Power Meter Programming Guide