Standard Items
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See Common Modbus OPC Items. In addition to the common items, the Modbus SCADAPack protocol also has the following Extended items:
Modbus SCADAPack Extended Items - Common
| Item | Data Type | Description |
|---|---|---|
DateTime | Date | Date and time in the RTU. |
LastAlarmRecord/n | Date | Date and time of the last alarm record retrieved from the RTU. Specify the run number 1 to 10 for ‘n’. |
LastAuditRecord/n | Date | Date and time of the last audit record retrieved from the RTU. Specify the run number 1 to 10 for ‘n’. |
LastDailyRecord/n | Date | Date and time of the last daily record retrieved from the RTU. Specify the run number 1 to 10 for ‘n’. |
LastEventRecord/n | Date | Date and time of the last event record retrieved from the RTU. Specify the run number 1 to 10 for ‘n’. |
LastEventRecord/n | Date | Date and time of the last event record retrieved from the RTU. Specify the run number 1 to 10 for ‘n’. |
LastHourlyRecord/n | Date | Date and time of the last hourly record retrieved from the RTU. Specify the run number 1 to 10 for ‘n’. |
MoveDaily/1 | I2 | Moves the daily retrieval record position back in time. Write the number of days to move back. This item can be used to re-collect daily records. Specify the run number 1 to 10 for ‘n’. |
MoveHourly/1 | I2 | Moves the hourly retrieval record position back in time. Write the number of hours to move back. This item can be used to re-collect hourly records. Specify the run number 1 to 10 for ‘n’. |
ResetAlarm/1 | BOOL | Resets the alarm retrieval record position. Write a ‘True’ to this item to remove record position information. This will cause all alarm records to be retrieved again. Specify the run number 1 to 10 for ‘n’. |
ResetAudit/1 | BOOL | Resets the audit retrieval record position. Write a ‘True’ to this item to remove record position information. This will cause all audit records to be retrieved again. Specify the run number 1 to 10 for ‘n’. |
| ResetBatch/1 | BOOL | Resets the batch retrieval record position. Write a ‘True’ to this item to remove record position information. This will cause all batch records to be retrieved again. Specify the run number 1 to 10 for ‘n’. |
ResetDaily/1 | BOOL | Resets the daily retrieval record position. Write a ‘True’ to this item to remove record position information. This will cause all daily records to be retrieved again. Specify the run number 1 to 10 for ‘n’. |
ResetEvent/1 | BOOL | Resets the event retrieval record position. Write a ‘True’ to this item to remove record position information. This will cause all event records to be retrieved again. Specify the run number 1 to 10 for ‘n’. |
ResetHourly/1 | BOOL | Resets the hourly retrieval record position. Write a ‘True’ to this item to remove record position information. This will cause all hourly records to be retrieved again. Specify the run number 1 to 10 for ‘n’. |
RetrieveHistory | I2 | Retrieve History |
ShowAGA8 | I2 | Write the run number (1 to 10) to this item to make the AGA8 configuration data for the specified run available in Modbus registers 49780 – 49822. |
ShowNX19 | I2 | Write the run number (1 to 10) to this item to make the NX-19 configuration data for the specified run available in Modbus registers 49840 – 49848. |
TimeSync | I2 | Synchronize the real time clock in the RTU with the host computer.
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Sections AGA31985 and AGA31992
| Data Item | Details |
|---|---|
| DifferentialPressureDeadBand | float |
| IsentropicExponent | float |
OrificeDiameter | float |
| OrificeMaterial | AGA-3 (1985, 1992) 0 = type 304 & 316 stainless steel, 1 = Monel, 2 = carbon steel AGA-3 (2013) 0 = type 304/316 stainless steel, 2 = carbon steel, 3 = type 304 stainless steel 4 = type 316 stainless steel 5 = Monel 400 |
| OrificeReferenceTemperature | float |
| PipeDiameter | float |
| PipeMaterial | AGA-3 (1985, 1992) 0 = type 304 & 316 stainless steel, 1 = Monel, 2 = carbon steel AGA-3 (2013) 0 = type 304/316 stainless steel, 2 = carbon steel, 3 = type 304 stainless steel 4 = type 316 stainless steel 5 = Monel 400 |
| PipeReferenceTemperature | float |
| StaticPressureDeadBand | float |
| TemperatureDeadBand | float |
| Viscosity | float |
Examples: Config.AGA31985.OrificeDiameter/2, Config.Write.AGA1992.PipeMaterial/4
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