Output Tags
- Last UpdatedAug 04, 2025
- 2 minute read
The driver defines a number of tag addresses which can be used to send process information in a control direction. The output tags are write only.
The following tags are used to perform direct write operations.
<IOA> is used to represent an information object address, defined as a decimal number in the range 0 — 16777215.
Note: To send the command with the time tag CP56Time2a, use the address with a suffix "T".
|
Address format |
Plant SCADA type |
IEC 60870 command |
Description |
|---|---|---|---|
|
C<IOA> CT<IOA> |
DIGITAL |
Single command Double command Regulating step command |
Digital output: • 0 becomes (0,1) (trip) Regulating step commands are similar to single commands, except that writing a 0 means "next step lower", and 1 means "next step higher". |
|
CI<IOA> CIT<IOA> |
INTEGER |
Set point command: normalized and scaled value |
Integer output |
|
CF<IOA> CFT<IOA> |
FLOAT |
Set point command: |
Float point output |
The following tags are used for digital select/execute operations.
|
Address format |
Plant SCADA type |
Description |
|---|---|---|
|
C<IOA>.Sel CT<IOA>.Sel |
DIGITAL |
Transmits select request |
|
C<IOA>.Desel CT<IOA>.Desel |
DIGITAL |
Transmits break off command (deselect request) |
|
C<IOA>.Ex CT<IOA>.Ex |
DIGITAL |
Transmits execute request |
|
CI<IOA>.Sel CIT<IOA>.Sel |
INTEGER |
Transmits set point command(select request) for normalized or scaled value. |
|
CI<IOA>.Desel CIT<IOA>.Desel |
INTEGER |
Transmits set point command(deselect request) for normalized or scaled value. |
|
CI<IOA>.Ex CIT<IOA>.Ex |
INTEGER |
Transmits set point command(execute request) for normalized or scaled value. |
|
CF<IOA>.Sel CFT<IOA>.Sel |
FLOAT |
Transmits set point command(select request) for short floating point. |
|
CF<IOA>.Desel CFT<IOA>.Desel |
FLOAT |
Transmits set point command(deselect request) for short floating point. |
|
CF<IOA>.Ex CFT<IOA>.Ex |
FLOAT |
Transmits set point command(execute request) for short floating point. |
Note: Double commands, regulating step commands and set-point commands for scaled value are only supported if a tag is configured in the IOA configuration file with the appropriate information. See Configuring Commands for Individual IOAs.
The following tag is used to get a cause of transmission code passed in monitoring direction after completion of single and double commands, regulating step command and set point commands. This tag has read/write access.
|
Address format |
Plant SCADA type |
Description |
|---|---|---|
|
C<IOA>.Conf CT<IOA>.Conf |
INTEGER |
Confirmation code: • 0x7 - activation confirmation |
Note: The address format used in the tables 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.