Speaker
Description
The control system of the GSI accelerator complex dates back to the early 1990s.
It is based on a derivative of the MIL-1553 field bus, providing around 1 Mbit/s throughput and deterministic real-time operation.
Although a modern control architecture with smart front-ends (System Control Units, SCUs), Ethernet, and White Rabbit is now widely deployed at GSI, several hundred devices still depend on the legacy network and protocols.
The ageing electronics and limited bandwidth provide strong motivation to migrate to the new control system.
However, an upgrade is limited by various constraints: strict real-time operation, existing software architecture, physical space and available power sources. Therefore, operation of the legacy interfaces must be ensured for at least another decade while a unified migration strategy is hard to find.
In this contribution, we present a generic approach for extending the lifetime of the existing MIL-1553-based systems and gradual replacement of their components. This includes upgrades of bus controllers, device controllers, the bus itself as well as a new Modbus/TCP-based solution for simple devices.
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