American Magnetics 420 Power Supply Programmer - Manual (Page 106)

88 Rev. 7
Remote Interface Reference
Switch Heater Commands and Queries
‡
ZERO
Places the Model 420 in ZEROING CURRENT mode. Ramping
automatically initiates and continues at the ramp rate until the power
supply output current is equal to 0 A at which point the AT ZERO status is
returned.
‡
STATE?
Returns an integer value corresponding to the ramping state according to
the table below:
4.5.6 Switch Heater Commands and Queries
The PSwitch commands control and query the state of the persistent
switch heater. For further information regarding the persistent switch
heater, see paragraph 3.4 on page 59.
‡
PSwitch {0|1}
Turns the persistent switch heater OFF and ON. Sending “0” turns the
switch heater OFF. Sending a “1” turns the switch heater ON. The default
value is “0”.
‡
PSwitch?
Returns a “0” indicating the switch heater is OFF, or a “1” indicating the
persistent switch heater is ON.
Table 4-5. Return values and their meanings for the STATE? query.
Return
Value Meaning
1 RAMPING to programmed current/field
2 HOLDING at the programmed current/field
3 PAUSED
4 Ramping in MANUAL UP mode
5 Ramping in MANUAL DOWN mode
6 ZEROING CURRENT (in progress)
7 Quench detected
8 Heating persistent switch
9 AT ZERO current