read a region of Idec Micro PLC memory.
The Idec Micro Register Block Tag
read a region of Idec Micro PLC memory.
The Idec Micro Register Block Tag supports the configuration properties of the Byte Register Block Tag plus these properties:
| Property | Type | Version | Description |
|---|---|---|---|
| ScanInterval | TIME | 2.1 | The interval between each scan. See Interval and Offset for information on how timed activities are scheduled. |
| ScanOffset | TIME | 2.1 | The offset added to the ScanInterval to get the actual scan time. See Interval and Offset for information on how timed activities are scheduled. |
| Device | Reference | 2.1 | The Idec Micro PLC Tag where the register block is located. |
| DataAddress | STRING | 2.1 |
The data address of the first byte of the register block. See Idec Micro PLC Data Address for information on how this field is formatted. Click the Browse button  to access the memory address editor.
|
| ByteCount | UINT | 2.1 | The number of bytes to read. |
The Idec Micro protocol defines maximum limits for the number of bytes that can be read in a single read request. When the ByteCount property exceeds these limits, the driver will use multiple read requests to read the data.
The Idec Micro Register Block Tag supports these tag commands:
| Tag Command | Version | Description |
|---|---|---|
| Refresh | 2.1 | Requests an immediate read of the data from the PLC. |
Note: Event triggered data reads (from the Refresh Tag Command) and periodic data reads (defined by the ScanInterval property) are independent. You can use the Refresh Tag Command, or the ScanInterval property, or both to determine when the data is read from the PLC.
The Idec Micro Register Block Tag builds on the features of these tag types:
To learn how activities are scheduled using Interval and Offset.
To learn how to choose a data location in an Idec Micro PLC.
To learn about the I/O Analog Data Point Tag that can be associated with the Idec Micro Register Block Tag.
To learn about the I/O Digital Data Point Tag that can be associated with the Idec Micro Register Block Tag.
To learn about the I/O Word Data Point Tag that can be associated with the Idec Micro Register Block Tag.
I/O Double Word Data Point Tag
To learn about the I/O Double Word Data Point Tag that can be associated with the Idec Micro Register Block Tag.
For an overview of the Idec Micro Driver.
To learn about properties common to all Byte Register Block Tags.
For the meaning of terms used in Fernhill SCADA.