vs | plus

The coordination flag can be set for the following three types of traffic stream:

• Coordination flag main stream
• Coordination flag minor stream WITH call
• Coordination flag minor stream WITHOUT call

vs | plus allows you to choose between four different degrees of coordination. This determines how strongly the green commands are synchronised with the frame signal plan. These degrees of hardness relate to main streams on the one hand and minor streams on the other. It can be determined whether only main or only minor streams or both are to be synchronised with the frame signals.

Hard coordination strictly follows the frame plan. This means that a traffic stream can only receive green if its signalling and switch-on command takes place within the frame for call. This means that the signalling area of the frame signal is strictly adhered to. The main pointer can also only point to this traffic stream as long as the frame signal is present. It should be noted that in the case of hard coordination, traffic streams that are not switched to green within the frame signal for signalling due to a higher priority intervention, for example, can be omitted.

Soft coordination follows the frame signal less strictly. In this case, only the request is synchronised with the frame signal for call. The green command can then also be given outside the frame signals. As a result, the main pointer can also point to this traffic stream outside the frame signal. Soft coordination prevents traffic streams from being omitted. Traffic streams that could not be switched to green within the frame signal for call, e.g. due to an intervention of higher priority, are switched later. It should be noted that the coordination can be significantly disrupted (green no longer in the target area).

The coordination flag can be set differently to SOFT or HARD for both the main streams and the minor streams with and without demand.

However, the coordination flags for each traffic stream are only active if the corresponding global flags in the programme definition are set to "according to traffic stream definition (Ct)".