Global power characteristics changed

Triggered by change of global power characteristics (voltage, frequency). Arguments are stored in table event.args

Arguments

• frequency NETIO frequency [Hz] * 1000
• voltage NETIO voltage [V] * 1000

Print arguments

-- print all arguments
for i, v in pairs(event.args) do
  logf("%s: %s",tostring(i),tostring(v))
end