Elecraft KPA500 Prog. Reference - Manual (Page 3)

^FC" (Fan Minimum Control, GET/SET)
RSP/SET format: ^FCn; where n = fan minimum speed with range from 0 (off) to 6 (high).
^FL" (Current Fault, GET/CLEAR)
SET format: ^FLC; clears the current fault.
RSP format: ^FLnn; where nn = current fault identifier. nn = 00 indicates no faults are active.
^NH" (Enable Inhibit# Input, GET/SET)
SET/RSP format: ^NHn; where n = 1 to enable INHIBIT# input pin, or n = 0 to disable the INHIBIT#
input pin.
^ON " (Power Status & Off, GET/SET)
SET format: ^ON0; turns the KPA500 off.
RSP format: ^ONn; where n = 1. No response if off.
Note: if a ON; quickly follows a ON0; you _may_ see a ON0; response.
See the ‘P’ command in the BootLoader section for a serial command to turn on the KPA500.
^OS" (OP/STBY, GET/SET)
SET/RSP format: ^OSn; where n = 0 for Standby, or n = 1 for Operate mode.
^PJ" (Power Adjustment, GET/SET)
SET/RSP format: ^PJnnn; where nnn = the power adjustment setting wih a range of 80 to 120. The Power
Adjustment value is saved on a per-band basis for the current band. The response indicates the setting for
the current band.
^RVM " (Firmware Release identifier, GET only)
RSP format: ^RVMnn.nn; where nn.nn is the firmware version.
^SN " (Serial Number, GET only)
RSP format: ^SNnnnnn; where nnnnn - the KPA500 serial number.
^SP" (Fault Speaker On/Off, GET/SET)
SET/RSP format: ^SPn; where n = 0 for speaker off, or n = 1 for speaker on.
3