Changes

{| class="wikitable"

{| class="wikitable"

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! firmware version !! code digits !! coding scheme upgrade !! notes

! Soft version !! Program number digits !! Connection scheme upgrade

|-

|-

| <= 2017-09-01 || 3 || (no previous coding scheme) ||

| <= 2017-09-01 || 3 || XXX

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|-

| > 2017-09-01 and < 2018-xx-xx || 4 || XXX => 1XXX ||

| > 2017-09-01 and < 2018-01-01 || 4 || XXX => XXXX

|}

|}