Technical data

3 Remote Interface Reference
System-Related Commands
92 E364xA User’s and Service Guide
OUTPut?
Query the output state of the power supply. The returned
value is 0 (OFF) or 1 (ON).
OUTPut:RELay {OFF|ON}
Set the state of two TTL signals on the RS- 232 connector
pin 1 and pin 9. These signals are intended for use with an
external relay and relay driver. At *RST, the OUTPut:RELay
state is OFF. Refer to “Disconnecting the output using an
external relay” on page 48 for more information.
OUTPut:RELay?
Query the state of the TTL relay logic signals.
SYSTem:BEEPer
Issue a single beep immediately.
SYSTem:ERRor?
Query the power supply’s error queue. A record of up to 20
errors are stored in the power supply’s error queue. Errors
are retrieved in the first- in- first- out (FIFO) order. The first
error returned is the first error that was stored. When you
have read all errors from the queue, the ERROR annunciator
turns off and the errors are cleared. Refer to Chapter 4,
“Error Messages” for more details.
NOTE
Do not use the RS-232 interface if you have configured the power supply to
output relay control signals. Internal components on the RS-232 circuitry
may be damaged.