If you want to edit a signal controller in Vissig, you have to create a Vissig signal controller at the desired node or main node
Creating a new signal controller of the type Vissig
If no signal controller has been allocated to the node, insert a signal controller of the type Vissig:
1. In the junction editor, open the selected node or main node (Displaying a network object in the Junction editor).
2. Allocate a signal controller to the node via the 
Create signal controller symbol.
The Create signal controller window opens.
3. Enter the desired data and select the signal controller type Vissig.
4. Confirm with OK.
The Save external control window opens.
5. Enter the file name and the path, if required.
6. Click the Save button.
The Vissig editor opens for further editing of the signal controller.
Converting an existing Visum-internal signal controller for Vissig
If a signal controller of the signal controller type Signal group-based or Stage-based is already allocated to the node, convert the signal controller:
1. In the Junction editor, open the selected node or main node (Displaying a network object in the Junction editor).
2. In the toolbar, click the 
Convert to external controller icon.
The Save external control window opens.
3. In the File type selection list, select the entry External control (*.sig).
4. Enter the file name and the path, if required.
5. Click the Save button.
A control file *.sig is saved and the program Vissig opens for further processing of the signal controller.
