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Here are additional information regarding the data types and the size from the documentation, Chapter 13.2 (p.262) "IEC Data Object Type Mapped to Unity Pro EDT/DDT" :
WORD = 2
INT = 2
DWORD = 4
DINT = 4
REAL = 4
CP56 = 8
E.g. for a M_ME_A type configured as 'Value + Time' (INT + CP56), you can configure an array with the max size 99 (99 x (INT + CP56) = 99 x (2 + 8) = 990 bytes).
If you enter a higher value from the Web site, the following message appears :
"Point Count must be less than 100 in current configuration"