Panel for connections - IEC 60870 101

Open the panel for configuring IEC driver connections via the System management panel, Driver IEC tab:

Click on the IEC 60870 101 Driver button to open the following panel, in which you can create the data points for your connections (e.g. Iec101A) and all addresses of the associated remote control components.

Figure 1. IEC connections panel

IEC 60870 101 - Target

Configure the Connection Datapoints

Select here the data point name (connection name) that should be configured from the combo box.

Click on Create to create a new data point of the _IecConnection data point type. (incl. redundant DP). Valid characters for a connection data point are [a-z,A-Z,0-9,_]. In a redundant WinCC OA project a data point with the name "<datapointName>_2" is created automatically.

Click on Delete to delete the selected DP.

Click on Apply to apply the creation/deletion.
Note: You can only add one connection at a time. After applying the changes, you can add or delete another connection.

Connection settings

Note: The IEC connection configuration cannot be changed at runtime.

Allows the configuration of separate "physical" connections.

Device name

Name of the device as configured in the config entry device_101 (<devname> - Symbolic name).

Driver number

The driver number that is used to connect to the stations. Use this driver number when configuring the peripheral address.

Link address

IEC60870 101 link address of the station.

Set invalid bit

Configures the invalid bit setting on connection loss. See IEC driver internal DP _IecConnection.Config.SetInvalidBit.


Sets all configured connections to (in)active.

Local List

Enter the addresses of the stations that can only be accessed via this connection (see IEC driver, basics). The addresses are specified in the text box below the lists. Format: " region.component.module.value.subaddress" (= Common Address.Information Object Address, see also Panel for defining the peripheral addresses of the IEC driver). A value of "*" means "all values between 0 and 255".

The buttons allow you to insert, edit or delete (see Default buttons).

Global List

Enter the addresses of all stations that are not only accessible via this station (Dev1) but rather via other stations, too. This saves you having to enter parameters several times for redundant connections. In our example the same stations are also accessed via the stations with the addresses starting with 1.2. and 3.4.

CAUTION: With addresses of the list, make sure that you specify the address without a data type, while the IEC bus address begins with the data type (see Panel for defining the peripheral addresses of the IEC driver). This is particularly important when filtering by DPs!
CAUTION: Telegrams that are received from the PLC and are not available in the global or local list but posses a WinCC OA address, are processed by the driver.
Note: If several connections, which contain same addresses in the local or global list, are created the messages are always sent via all paths. This means that the station receives the messages more than once.
Note: If you want to execute a general query via the config entry autoGQ, _DriverCommon or _IecConnection data point, a wildcard ('*') must not be used for the Common Address (first 2 bytes from left) in the Local/Global List!
Note: The difference between Local and Global List is irrelevant in the driver itself. Both lists are equivalent for the driver. The distinction between local and global stations is only intended to make the configuration easier!
CAUTION: If no explicit connection name is specified in the peripheral address, the driver only sends telegrams via the one connection if the station is in the local or global list. Otherwise the command is discarded!


Displays the (DP global) communication state (States.ConnState):

  • 0: Communication error

  • 1: Communication OK

  • 3: Connection deactivated

  • > 4: Connectionstate undefined