3 Remote Interface Reference
Triggering Commands
94 E3632A User’s Guide
• To trigger the power supply from the remote interface
(GPIB or RS- 232) after selecting the bus source, send the
*TRG (trigger) command. When the *TRG command is
sent, the trigger action starts after the specified time
delay if any delay is given.
• You can also trigger the power supply from the GPIB
interface by sending the IEEE- 488 Group Execute Trigger
(GET) message. The following statement shows how to
send a GET from a Hewlett- Packard controller.
TRIGGER 705 (group execute trigger)
• To ensure synchronization when the bus source is
selected, send the *WAI (wait) command. When the *WAI
command is executed, the power supply waits for all
pending operations to complete before executing any
additional commands. For example, the following
command string guarantees that the first trigger is
accepted and is executed before the second trigger is
recognized.
TRIG:SOUR BUS;*TRG;*WAI;*TRG;*WAI
• You can use the *OPC? (operation complete query)
command or the *OPC (operation complete) command to
signal when the operation is complete. The *OPC?
command returns 1 to the output buffer when the
operation is complete. The *OPC command sets the OPC
bit (bit 0) in the Standard Event register when the
operation is complete.
Immediate triggering
• To select the immediate trigger source, send the following
command.
TRIG:SOUR IMM
• When IMMediate is selected as a trigger source, an
INITiate command immediately transfers the
VOLT:TRIG or CURR:TRIG value to the VOLT or CURR
value. Any delay is ignored.
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