Agilent 34980A  Multifunction Switch/Measure Unit 34980-90005

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3 Features and Functions Executing a Sequence After you have defined a valid sequence, you can execute it to process the specified commands. If the specified sequence name is not currently stored in memory, an error will be generated. If you attempt to trigger a sequence while one is already executing, the trigger will be placed in a queue. When the trigger queue is full, a “trigger ignored” error will be generated. To abort a sequence execution from the remote interface, use the ROUTe:SEQuence:ABORt command or a Device Clear. When the sequence is terminated, the resultant instrument state will be determined by how of the sequence had been executed when the ABORt/Device Clear was received. An ABORt command (system abort) executed from within a sequence will not terminate the sequence. The *RST and SYSTem:PRESet commands will also abort a sequence execution prior to performing their own actions. When a sequence is defined, the specified commands are checked for proper syntax and absolute parameter range limits. If an error is detected during compilation, the entire sequence will be discarded. More extensive error checking, such as channel range expansion and validation, is performed when the sequence is executed. A sequence may invoke another sequence, but may not invoke itself recursively. In addition, the number of invocations is limited to four levels of nesting and this is enforced at the time of execution. Exceeding the limit will abort the sequence and an error will be generated. You can also execute a sequence when an alarm condition is reached. See “Executing a Sequence on an Alarm Condition” on page 145 for more information. While a scan is running (see “Scanning” on page 108), the instrument prevents use of all channels in banks that contain one or more channels in the specified scan list (these channels are dedicated to the scan). Therefore, if a sequence attempts to operate a channel in a scanned bank, an error is generated and the entire sequence will be discarded. Front Panel Operation: Sequence > EXECUTE Although sequences can be defined from the remote interface only, you can execute pre- defined sequences from the front panel. Remote Interface Operation: The following command executes a sequence named “MYSEQ_1”, which closes several channels on the module in slot 1 and opens a single channel on the module in slot 2. ROUT:SEQ:DEF MYSEQ_1,"ROUT:CLOS (@1001:1009);OPEN (@2001)" ROUT:SEQ:TRIG MYSEQ_1 144 Agilent 34980A Mainframe User’s Guide
Executing a Sequence on an Alarm Condition Features and Functions 3 After you have defined a valid sequence, you can configure the instrument to execute a sequence when a reading crosses an alarm limit on a channel. The specified sequence will execute once when an alarm occurs on the specified alarm. If the specified sequence name is not currently stored in memory, an error will be generated. For more information on configuring alarms, see “Alarm Limits” on page 132. Assigning a sequence to an alarm will remove any other sequence's association with that alarm, as well as that alarm’s association to any other sequence. You can assign multiple channels to any of the four available alarms (numbered 1 through 4). For example, you can configure the instrument to generate an alarm on the Alarm 1 output when a limit is exceeded on any of channels 1003, 2005, or 3010. You cannot, however, assign alarms on a specific channel to more than one alarm number. The sequence will execute once when an alarm occurs, after which the trigger source will be automatically set to MANual. The sequence will not execute again until the trigger source has been reassigned, the alarm has been cleared, the association of the sequence to the alarm has been re- established, and the alarm condition exists again. Front Panel Operation: Sequence > TRIGGER > MANUAL|ALARM1–ALARM4 Select MANUAL to remove an association without reassigning it to another alarm. Remote Interface Operation: To assign the sequence to a specific alarm number, use the following command. Specify the MANual parameter to remove an association without reassigning it to another alarm. ROUTe:SEQuence:TRIGger:SOURce ,{ALARm1-ALARm4|MANual} The following program segment selects the alarm source and configures the instrument to execute the sequence named “MYSEQ_1” when an alarm is reported on Alarm 1. The Monitor mode is used to evaluate alarm conditions on the selected channel. ROUT:SEQ:DEF MYSEQ_1,"ROUT:CLOS (@1001:1009);OPEN (@2001)" CALC:LIM:UPP 10.25,(@1003) CALC:LIM:UPP:STAT ON,(@1003) OUTP:ALARM1:SOUR (@1003) ROUT:MON:CHAN (@1003) ROUT:MON:CHAN:ENAB ON, (@1003) ROUT:SEQ:TRIG:SOUR MYSEQ_1,ALAR1 ROUT:MON:STAT ON INIT Agilent 34980A Mainframe User’s Guide 145
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Agilent 34980A  Multifunction Switch/Measure Unit *34980-90005*

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Agilent 34980A  Multifunction Switch/Measure Unit 34980-90005