American Magnetics 420 Power Supply Programmer - Manual (Page 105)

Rev. 7 87
Remote Interface Reference
Ramping State Commands and Queries
This query requires that a coil constant be defined, otherwise an error is
generated.
‡
VOLTage:MAGnet?
Returns the magnet voltage in volts. Requires voltage taps to be installed
across the magnet terminals.
‡
VOLTage:SUPPly?
Returns the power supply voltage commanded by the Model 420 in volts.
‡
CURRent:MAGnet?
Returns the measured magnet (shunt) current in amperes.
‡
FIELD:MAGnet?
Returns the calculated field in kilogauss or Tesla, per the selected field
units. This query requires that a coil constant be defined, otherwise an
error is generated. The field is calculated by multiplying the measured
shunt current by the coil constant.
4.5.5 Ramping State Commands and Queries
The ramping state commands control and query the ramping state of the
Model 420. For more information regarding each state, see paragraph 3.3
on page 52.
If the ramping state is commanded remotely, the front panel display and
switch LEDs will update and accurately reflect the commanded ramping
state.
‡
RAMP
Places the Model 420 in the programmed ramping mode. The Model 420
will continue to ramp at the ramp rate until the programmed current/field
is achieved.
‡
PAUSE
Pauses the Model 420 at the present operating current/field.
‡
UP
Places the Model 420 in the MANUAL UP ramping mode. Ramping
continues at the ramp rate until the current limit is achieved.
‡
DOWN
Places the Model 420 in the MANUAL DOWN ramping mode. Ramping
continues at the ramp rate until the current limit is achieved (or zero
current is achieved for unipolar power supplies).