B.5.4.4: Log Retrieval Example - Electro Industries Shark 200 Installation & Operation Manual

• Compute the next expected record index by adding Records Per Window,
to the current expected record index. If this value is greater than the
number of records, re-size the window so it only contains the remaining
records and go to step 1d (Write the retrieval information), where the
Records Per Window will be the same as the remaining records.
3. Disengage the log: write the Log Number (of log being disengaged) to the Log
Index and 0 to the Enable bit [0xC34F, 1 reg].

B.5.4.4: Log Retrieval Example

The following example illustrates a log retrieval session. The example makes the
following assumptions:
• Log Retrieved is Historical Log 1 (Log Index 2).
• Auto-Incrementing is used.
• Function Code 0x23 is not used (Repeat Count of 1).
• The Log contains Volts-AN, Volts-BN, Volts-CN (12 bytes).
• 100 Records are available (0-99).
• COM Port 2 (RS485) is being used (see Log Availability).
• There are no Errors.
• Retrieval is starting at Record Index 0 (oldest record).
• Protocol used is Modbus RTU. The checksum is left off for simplicity.
• The Shark® 200 meter is at device address 1.
• No new records are recorded to the log during the log retrieval process.
Electro Industries/GaugeTech
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
The Leader In Power Monitoring and Smart Grid Solutions
B: Modbus Map and Retrieving Logs
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Doc E149701 B-21