KEPCO KLP Series Developers Guide, Rev 3 - Manual (Page 18)

1-8
KLP-DEV 041213
• 4 - Input Power Error — 1 indicates input mains error.
• 5 - Fan Error — 1 indicates inoperative fan.
• 6 - Master/Slave Error — 1 indicates communication error between master and slave
units.
• 7 - 15 — Not used (always zero).
1.2.7.6 ERROR/EVENT QUEUE
The Error/Event queue is a FIFO (first in first out) buffer that stores errors as they occur. As it is
read, each error is removed from the queue and the next error message is made available.
When all errors have been read, the query returns 0,”No error”.
If more than 15 errors are accumulated, it will overflow. When overflow occurs, the oldest errors
stay in the queue, but the most recent errors are discarded. The last error in the queue will be -
350,”Too many errors.” Error messages are defined in Appendix B, Table B-5.
1.2.8 TRIGGER
The KLP unit has the ability to utilize both a software trigger and an external (hardware) trigger.
Model 1-2.K units have an additional software trigger capability accessed via Port 5044. When a
trigger event is properly enabled and received, the output voltage and current are set to the pre-
set trigger levels.
The TRIG:SOUR command (see PAR. B.107) determines whether the external (hardware)
(EXT) or software (INT) trigger is selected.
If external trigger mode is selected, the hardware trigger is activated by grounding the
EXT_TRG line (J2 pin 14 to pin 9, 11, 13 or 15); this creates the trigger event at which time the
trigger values (preset values VOLT:TRIG and CURR:TRIG) will become the setpoint values
(Vset and Cset) for the power supply. Refer to PARs. B.44, B.56, and B.94. The VOLT:TRIG
and CURR:TRIG values are reset to the default minimum (zero V or minimum A) when the unit
is calibrated or if a virtual model setting is changed.
If software trigger is selected, trigger events are activated by *TRG (see PAR. A.16) or a GPIB
<GET> command.