
B: Modbus Map and Retrieving Logs
Doc# E149701 MM-39
Electro Industries/GaugeTech
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Description (Note 1) Format Range (Note 6) Units or Resolution Comments # Reg
Modbus Address
Hex Decimal
C787 - C796 51080 - 51095
I/O Change Log Status Block
16
C797 - C7A6 51096 - 51111
Power Quality Log Status Block
16
C7A7 - C7B6 51112 - 51127
Waveform Capture Log Status Block
16
Block Size: 128
FLOAT 32-bit IEEE floating point number spanning 2 registers. The lower-addressed register is the high order half (i.e., contains the exponent).
TSTAMP 3 adjacent registers, 2 bytes each. First (lowest-addressed) register high byte is year (0-99), low byte is month (1-12). Middle register high byte is day(1-31), low byte is hour (0-23 plus DST bit).
DST (daylight saving time) bit is bit 6 (0x40). Third register high byte is minutes (0-59), low byte is seconds (0-59). For example, 9:35:07AM on October 12, 2049 would be 0x310A, 0x0C49, 0x2307,
assuming DST is in effect.
Data Formats
ASCII ASCII characters packed 2 per register in high, low order and without any termination characters. For example, "Shark200" would be 4 registers containing 0x5378, 0x6172, 0x6B32, 0x3030.
SINT16 / UINT16 16-bit signed / unsigned integer.
SINT32 / UINT32 32-bit signed / unsigned integer spanning 2 registers. The lower-addressed register is the high order half.
same as alarm log status block
same as alarm log status block
same as alarm log status block
End of Map
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