KEPCO MST 488 Programmer - Manual (Page 50)

B-2
MST 488-27 013004
B.4
INITiate:CONTinuous
QUERY
INIT:CONT?
Syntax: Short Form: INIT:CONT? Long Form: :INITiate:CONTinuous?
Return Value: 1 or 0
Description: Determines whether continuous triggers are enabled or disabled. Power supply returns value of
INIT:CONT flag: “1” = continuous triggers are enabled (INIT:CONT ON); “0” = continuous triggers
disabled (INIT:CONT OFF). (See example, Figure B-3.)
B.5
INSTrument:CATalog
QUERY
INST:CAT?
Syntax: Short Form: INST:CAT? Long Form: :INSTrument:CATalog?
Return Value: comma separated string with the instrument numbers found on the bitbus.
Description: Allows the host computer to determine what instruments are on the bitbus. Unlike the *RST com-
mand, this command does not scan possible bitbus addresses to determine if the device is present.
The list contains all channel numbers found and allows the host computer to determine if the MST
power supplies are connected and powered-up (see Figure B-1).
FIGURE B-1. USE OF INSTrument:CATalog QUERY
B.6
INSTrument[:NSELect]
COMMAND
INST:NSEL
Syntax: Short Form :INST:NSEL Long Form: INSTrument:NSELect
Description: Selects power supply connected to channel number ; also brings off-line or “locked out”
power supply to on-line status. selects the instrument to which subsequent commands will be
addressed until another channel is selected. Identical to INST:SEL command (see PAR. B.7).
B.7
INSTrument[:SELect]
COMMAND
INST:SEL
Syntax: Short Form :INST:SEL Long Form: INSTrument:SELect
Description: Selects power supply connected to channel number ; also brings off-line or “locked out”
power supply to on-line status. selects the instrument to which subsequent commands will be
addressed until another channel is selected. The following the command is the channel
(node) number, from 1 to 31. This command is also used to bring a power supply on-line (i.e., the con-
troller recognizes a power supply assigned to a selected channel). In cases where a fault has “locked
out” a power supply (the controller no longer recognizes the power supply assigned to a channel), this
command restores the power supply to the system. (See example, Figure B-5.)
Example: STAT:QUES?2 Program reads the Questionable Event Register for power supply on channel 2.
If the power supply responds with 2048 (bit 11) indicating power loss, the power supply will be off-line
and unable to be selected. After the power fault has been corrected, the INST command is sent.
*RST Bitbus is scanned and all supplies are set to 0v, 0c, and Voltage mode
INST:CAT? With three MST's connected to the MST 488 controller the MST 488
returns 1,2,3 if their addresses are set to 1, 2 and 3.
*** User turns off supply 2.
INST:CAT? MST 488 returns 1,3
*** User turns on supply 2
INST:CAT? MST 488 returns 1,3
INST2 Channel 2 restored
INST:CAT? MST 488 returns 1,2,3
*** User turns off supply 3
INST:CAT? MST 488 returns 1,2
VOLT3 4;:SYST:ERR? MST 488 returns "0240, Hardware not found"
*** User turns on supply 3
VOLT3 4;:SYST:ERR? Channel 3 restored
INST:CAT? MST 488 returns 1,2,3