DL8000 Preset Instruction Manual
Revised February-2016 Communications Protocols D-75
table for Modbus Function 3, 4, or 16 up to the limit of 240 bytes. This
type of data table allows access to all its data with one request.
Periodic (Hourly) or Daily History Index registers should be mapped to
the TLP for the Periodic Index (Point Type 124, Parameter 5) or Daily
Index (Point Type 124, Parameter 6). In this TLP, the Logical number is
the History Segment number. Remember to create an index for each
History Segment from which you need to request history.
For Function Codes 01, 02, 05, and 15, the parameter specified should
be a single-byte parameter type, preferably a status parameter (only bit 0
is used), because this function packs the data into a binary format for
transmission. Each address span must be unique within the function for
proper operation. If not, the first valid address is used.
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