Input Tags
- Last UpdatedAug 04, 2025
- 2 minute read
The IEC870IP driver defines a number of tag addresses that allow process information to be passed to Plant SCADA in a monitoring direction. The input tags are read only.
<IOA> is used to represent an information object address, defined as a decimal number in the range 0 — 16777215.
Note: Tags with the following addresses are only updated when the driver receives a time-stamped
value directly from a device.
• SD<IOA>
• SI<IOA>
• SL<IOA>
• SF<IOA>
• SQD<IOA>
See Timestamp Handling for more information on the correct syntax to use for your input tags.
|
Address format |
Plant SCADA type |
IEC 60870 type |
Description |
|---|---|---|---|
|
D<IOA> SD<IOA> |
DIGITAL |
Single point Double point |
Digital value: • Value: digital value Example: D100 |
|
I<IOA> SI<IOA> |
INTEGER |
Measured value: Step Position Double Point |
Integer value: • Value: integer value Example: I200 |
|
L<IOA> SL<IOA> |
LONG |
Integrated totals |
Long value: • Value: long value Example: L300 |
|
F<IOA> SF<IOA> |
FLOAT |
Short Floating Point |
Float value: • Value: float value Example: F350 |
|
QD<IOA> SQD<IOA> |
INTEGER |
Quality descriptor |
The set of bitflags described in Quality Descriptors. This includes IEC 60870 quality flags and the IEC870IP driver-specific flags: • Value: quality descriptor value Example: QD350 |
Note: The address format used in the table above demonstrates unstructured tag addresses (i.e. "<IOA>"). The IEC870IP driver also supports structured tag addresses (e.g. "<IOA1>.<IOA2>.<IOA3>"). For more information, see Structured Tag Addressing.