Historical Log Blocks; Header - Electro Industries Shark 200 Installation & Operation Manual

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 program the log to record "Primary Readings Volts A-N."

Historical Log Blocks:

Start Register:
Block Size:
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 section 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:
Size:
Byte
Value
• # 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 sector 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}.
• Interval: The interval at which the Historical Log's Records are captured. This value
is an enumeration:
Electro Industries/GaugeTech
Electro Industries/GaugeTech
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0x7917 (Historical Log 1)
0x79D7 (Historical Log 2)
0x7A97 (Historical Log 3)
192 registers per log (384 bytes)
0x7917 - 0x7918
2 registers
0 1
# Registers # Sectors
B: Modbus Map and Retrieving Logs
2 3
Interval
#
Doc E149701 B-7