HP E8402A, User And Service Manual, Page: 149 / 249

Programming the Enhanced Monitor 151
Chapter 3
SYSTem:POWer
<
state
>
SYSTem:POWer?
SYSTem:POWer <state> sets the software controlled power-on/off state of
mainframe.
SYSTem:POWer? returns a string representing the power state of the mainframe.
Parameters
Returned Data
Comments
•
The mainframe can be turned on with this command at any time, even when
mainframe power is already on. Once set ON with this command, a
SYSTem:POW OFF must be sent before the mainframe can actually turn off.
The mainframe will not turn off unless the main power switch is on STDBY
and the Diagnostic Connector power pin (pin 5) is unasserted (not grounded,
refer to “Using the Remote Power-On Pins” on page 25).
Error Conditions
The following table lists the most common error conditions and causes. Error
numbers and corresponding messages can be found using
SYSTem:ERRor?
query.
Reset Condition
*RST has no effect on powering of the mainframe.
Related
Commands
SYSTem:POWer:STATus?
Name Type Range Default Description
< state> Boolean ON, OFF,
0, 1 1 Sets the software control state of the
mainframe. 0 is OFF, 1 is ON.
Type Range Description
Boolean 0, 1 Software control state for mainframe power. 0 is OFF, 1 is ON.
Number Message Probable Cause
-224 “Illegal Parameter” The <state> parameter was not correct.
-109 “Missing Parameter” The <state> parameter was omitted.
-221 “Settings Conflict” The mainframe cannot turn off by software control
because the main power switch is on, or the
Diagnostic Connector’s power pin is being driven.