How many of your sites does a platform cover at the depth you need?
Letters are our shorthand, not a vendor scheme. R = totals (energy or power). S = string, input or other component data. E = device events or alarms. C = settings or commands can be written. Write none if the brand is not supported. Tick the letters you need. The starting fleet is invented. Take the letters for each brand from the vendor's own device list. Separate fields with a semicolon or tab. Type 2500 or 2,500; "1.000" and "12," are rejected.