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E149721
B - 8
B: Modbus Map and Retrieving Logs
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
• The actual size of the record, and the number of items in the register list which are
used, is determined by the # registers in the header.
• Each register item is the Modbus Address in the range of 0x0000 to 0xFFFF.
Item Descriptor List:
Registers:
0x798E - 0x79C8
Size:
1 byte per item, 117 bytes (59 registers)
While the Register List describes what to log, the Item Descriptor List describes how
to interpret that information. Each descriptor describes a group of register items, and
what they mean.
Each descriptor is composed of 2 parts:
• Type: The data type of this descriptor, such as signed integer, IEEE floating point,
etc. This is the high nibble of the descriptor byte, with a value in the range of 0-14.
If this value is 0xFF, the descriptor should be ignored.
0
ASCII: An ASCII string, or byte array
1
Bitmap: A collection of bit flags
2
Signed Integer: A 2's Complement integer
3
Float: An IEEE floating point
4
Energy: Special Signed Integer, where the value
is adjusted by the energy settings in the meter's
Programmable Settings.
5
Unsigned Integer
6
Signed Integer 0.1 scale: Special Signed Integer,
where the value is divided by 10 to give a 0.1
scale.
7-14
Unused
15
Disabled: used as end list marker.
Summary of Contents for Shark 200S
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