Modbus Block History OPC Items
Standard Items
Protocol Items
Common Extended Items
See Common Modbus OPC Items. In addition to the common items, the Modbus Block History protocol also has the following Extended items:
Modbus Block History Extended Items
| Item | Data Type | Description |
|---|---|---|
| GCWrite/Txn | Used for automated gas quality download. | |
| LastDailyRecord/n | Date | Timestamp of the last daily record retrieved from meter number “n”. |
| LastEventRecord/n | Date | Timestamp of the last event record retrieved from meter number “n”. |
| LastHourlyRecord/n | Date | Timestamp of the last hourly record retrieved from meter number “n”. |
| LastRTUConfigRead | Date | Timestamp of the last RTU configuration read. |
| LastRTUConfigWrite | Date | Timestamp of the last RTU configuration write. |
| MoveDaily/1 | I2 | Move the daily history retrieval pointer for meter run 1. Write a negative number to move the pointer back in time, a positive number to move the pointer forward in time. The written value represents the number of days to move. |
| MoveHourly/1 | I2 | Move the hourly history retrieval pointer for meter run 1. Write a negative number to move the pointer back in time, a positive number to move the pointer forward in time. The written value represents the number of hours to move. |
| ResetDaily/1 | BOOL | Erase the daily history retrieval pointer (and re-collect all daily history during the next retrieval). |
| ResetHourly/1 | BOOL | Erase the hourly history retrieval pointer (and re-collect all hourly history during the next retrieval). |
| RetrieveHistory | I2 | Retrieve enabled history. |
Related Topics:
Common Modbus OPC Item Conversion
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