msp2_A_sysmlblock message flow

Buses, slowest talker last

Bus	Proto	Steps	Sig

Senders, and their symbol

Shape is the sender. Colour is the bus protocol. Click to mute a sender.

	Component	Msgs

Counts

How to read it

Every bus is its own node, so a message goes sender to bus to consumers. A fan-out you see is one transmission reaching many listeners, not many transmissions. That is drawn rather than assumed because a broadcast bus really is one wire: on a CAN frame every node shares it, and drawing a path per listener would both bury the picture and assert something false.

Node shape is the component language (square C++, circle Python, diamond FMU, hexagon SystemC). Dashed grey edges are Ethernet sockets and direct port links that exist in the fabric but carry no signal mapping, so nothing ever travels them here. They are drawn inert rather than hidden, because leaving them out would suggest those components are unconnected.