Instruction manual

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3.7.5.28.END OF STRING
The End of String (EOS) delimiter recognized by the AC Power System is the ASCII Line
Feed (LF). Carriage Return (CR) followed by Line Feed may also be used for EOS. The End
or Identify (EOI) IEEE-488 message END will also be recognized. The END message is sent
by setting the IEEE-488 End or Identify line true with the last data byte.
3.7.5.29.ERROR MESSAGES
Table 3-15 shows all of the possible error messages that can be generated by the AC Power
System. These messages will also be displayed on the front panel of the AC Power System.
3.7.5.30.TO OPEN (OPN) AND CLOSE (CLS) THE OUTPUT RELAY (Optional)
The OPN and CLS headers open and close the output relays in the power source. There is no
argument associated with these headers. When the OPN and CLS headers are received the
output voltage will be programmed to zero volts for 50 milliseconds before the output relays
open or close.
3.7.6. GROUP EXECUTE TRIGGER
The trigger mode is enabled when the mnemonic TRG is added to a setup string. The trigger
command may be inserted anywhere in the string. When the mnemonic is detected, it will
delay execution of the new setup values until the GPIB Device Trigger is sent by the bus
controller.
A GPIB Device Trigger will also terminate a programmed ramp or other program.
The following setup string will recall the values from register 9 and delay execution until the
GET message is received. (Note: GET is the abbreviation for the GPIB Group Execute
Trigger message and does not represent a series of ASCII characters. (See Table 3-10).
REC9TRG