How To Use Registers - Agilent Technologies EPM-P Series Programming Manual

How to Use Registers

There are two methods you can use to access the information in status
groups:
• the polling method, or
• the service request (SRQ) method.
Use the polling method when:
• your language/development environment does not support SRQ
interrupts.
• you want to write a simple, single purpose program and do not want to
add the complexity of setting an SRQ handler.
Use the SRQ method when you:
• need time critical notification of changes.
• are monitoring more than one device which supports SRQ interrupts.
• need to have the controller do something else while it's waiting.
• cannot afford the performance penalty inherent to polling.
EPM-P Series Power Meters Programming Guide
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Power Meter Remote Operation
Status Reporting
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