B-8 DGC-2020 Modbus™ Communication 9400200990 Rev I
MAPPING - DGC 2020 PARAMETERS INTO MODICON ADDRESS SPACE
Table Conventions
Table B-3 uses the conventions outlined in this section.
The “Data Format” column uses the following abbreviations:
• DP - Double Precision
• TP - Triple Precision
• FP – Floating Point
Data formatted in Double Precision uses a 2 register group designated (a) and (b) and is defined as
follows:
• Register (a) - 2 hi-order bytes
• Register (b) - 2 lo-order bytes
Data formatted in Triple Precision uses a 3 register group designated (a), (b) and (x). It is defined as
follows:
• Register (a) - 2 hi-order bytes
• Register (b) - 2 mid-order bytes
• Register (x) - 2 lo-order bytes
Other register groups using the (a), (b), etc. designators are an ordered data group of consecutive ASCII
characters or data bytes.
Legacy Parameter Table
The DGC-2020 maps all legacy parameters previously associated with the DGC-500 and DGC-1000 into
the Holding Register address space (40000 to 41999). Query address N will access the Holding Register
N+1. The Data Format is Integer type data unless identified otherwise in the Data Format column.
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