ISO

ISO, the International Organization for Standardization, is an international body that develops standards. ISO developed the OSI model, which describes a communications system as seven abstract layers, and inverter communication manuals use it to show where the Modbus serial stack fits. The IEC works closely with ISO under an agreement between the two bodies, and IEC standards such as IEC 62446-1 are drafted according to the ISO/IEC Directives, Part 2. ISO 9847:1992 covers calibrating field pyranometers against a reference pyranometer, and solar O&M guidelines list it as an applicable standard for performance monitoring. Some documents are joint ISO/IEC publications: product certifiers such as CSA hold ISO/IEC 17065 accreditation, and IEC 61850-9-2 sampled values run over ISO/IEC 8802-3. In grid and SCADA documents, the abbreviation ISO can also mean Independent System Operator, which is a different kind of organization.

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• sentence 2: support check: partial - ISO developing the OSI model with seven abstract layers and the Modbus serial stack fitting into it is stated, but the claim that inverter communication manuals generally use it is only shown by this one manual.
• sentence 5: support check: partial - CSA's ISO/IEC 17065 accreditation and sampled values over ISO/IEC 8802-3 are stated, but the passages do not say these are 'joint ISO/IEC publications' as a framing.
• sentence 6: support check: partial - The passage gives ISO as Independent System Operator, but doesn't say it is an alternative meaning to the standards body or that it is a different kind of organization. -->