Eaton IQ 150S, User & Installation Manual

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IM02601006E www.eaton.com B-6
IQ 150S/250S B: Modbus Map
ber of bytes for that item. By combining these two lists, the Historical Log record can be inter-
preted.
For example: Registers 0x03E7 and 0x03E8 are programmed to be recorded by the historical log.
The matching descriptor gives the data type as float, and the size as 4 bytes. These registers pro-
gram the log to record "Primary Readings Volts A-N."
Historical Log Blocks:
Start Register: 0x7917 (Historical Log 1)
0x79D7 (Historical Log 2)
0x7A97 (Historical Log 3)
Block Size: 192 registers per log (384 bytes)
The Historical Log programmable settings are comprised of 3 blocks, one for each log. Each is
identical to the others, so only Historical Log 1 is described here. All register addresses in this sec-
tion are given as the Historical Log 1 address (0x7917).
Each Historical Log Block is composed of 3 sections: The header, the list of registers to log, and
the list of item descriptors.
Header:
Registers: 0x7917 - 0x7918
Size: 2 registers
• # Registers: The number of registers to log in the record. The size of the record in memory is [12
+ (# Registers x 2)]. The size during normal log retrieval is [6 + (# Registers x 2)]. If this value is
0, the log is disabled. Valid values are {0-117}.
• # Sectors: The number of Flash Sectors allocated to this log. Each sector is 64kb, minus a sec-
tor header of 20 bytes. 15 sectors are available for allocation between Historical Logs 1, 2, and
3. The sum of all Historical Logs may be less than 15. If this value is 0, the log is disabled. Valid
values are {0-15}.
Byte 0 1 2 3
Value # Registers # Sectors Interval