Parameters can be found from Nibe modbus application in CSV format per pump model (application can be download from internet). I created awk script to generate channel types from CSV for nibe heat pump 2 binding. See https://github.com/paulianttila/openhab2-addons/blob/nibe2-final/addons/binding/org.openhab.binding.nibeheatpump/ESH-INF/thing/f1x45-types.xml. See more details from my repo or PR https://github.com/openhab/openhab2-addons/pull/1960.
Not sure, if all parameters are available from uplink.