Parker 590+ DRV, Product Manual

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A-12
Serial Communications
DC590+ DRV Series DC Digital Drive
3. Tag Access
Each parameter in the Inverter’s menu system is identified by a unique Tag Number. Information is exchanged across the system by use of a two
character Mnemonic that is derived from the Tag Number.
NOTE
Refer to the Parameter Specification Table in Appendix D for a full list of tag mnemonics - see the MN column. Refer to the Notes column
which gives access information about each parameter.
Parameter Mapping
The algorithm to convert between tag number and 2 character mnemonics is:
if (TagNo < 936) then
m = INT ((TagNo + 360)/36) (INT: the integer part )
n = (TagNo + 360) MOD 36 (MOD: the remainder)
if m > 9 then
char_1 = ‘a’ + (m - 10)
else
char_1 = ‘0’ + m
end_if
if n > 9 then
char_2 = ‘a’ + (n - 10)
else
char_2 = ‘0’ + n
end_if
else
m = INT ((TagNo - 936)/26) (INT: the integer part )
n = (TagNo - 936) MOD 26 (MOD: the remainder)
char_1 = ‘a’ + m
char_2 = ‘A’ + n
end_if
The algorithm generates mnemonics containing only the characters ‘0’ to ‘9’, ‘A’ to ‘Z’ and ‘a’ to ‘z’.
4. PNO Access
For compatibility with the earlier 590 product, parameters may also be accessed using the ASCII PNO listed in the “EI Bisynch Binary Parameter
Specification Tables”, page A-20. For example, PNO 39 can be accessed with the mnemonic “27”.