+110, "LXI mDNS Error"
+201, "Memory lost: stored state"
+202, "Memory lost: power-on state"
+203, "Memory lost: stored measurements"
+263, "Not able to execute while instrument is measuring"
+291, "Not able to recall state: it is empty"
+292, "State file size error"
+293, "State file corrupt"
+294, "Preference file size error"
+295, "Preference file corrupt"
+301, "Input termination protection relay opened"
+302, "Cannot reset input protection; high voltage present"
+305, "Not able to perform requested operation"
+310, "Channel 3 pulse width too short"
+311, "Channel 3 pulse width too long"
+312, "Channel 3 pulse width could not be measured"
+313, "Channel 3 burst frequency could not be measured"
+314, "Channel 3 pulse ended before gate closed"
+315, "Channel 3 power too high for operation"
+316, "Channel 3 power too low for operation"
+317, "Channel 3 power changed during measurement"
+318, "Channel 3 input is not pulsed signal"
+319, "Channel 3 frequency shift detected during measurement"
+320, "Input signal frequency shift caused internal counter overflow"
+321, "Measurement timeout occurred"
+322, "Measurement overflow occurred"
+514, "Not allowed"
+514, "Not allowed; Instrument locked by another I/O session"
+521, "Communications: input buffer overflow"
+522, "Communications: output buffer overflow"
+532, "Not able to achieve requested resolution"
+540, "Cannot use overload as math reference"
SCPI Error Messages
476 Keysight 53220A/53230A Programmer's Reference