WorldFIP is a
fieldbus widely used at CERN; there are more than 10’000 WorldFIP nodes
installed all around the LHC.
WorldFIP is used to connect critical sensors and actuators (by equipment
groups like Power Converters, Cryogenics, Beam Instrumentation etc) with
the control and supervision level.
The WorldFIP nodes are radiation-tolerant and are installed close the
LHC magnets. The WorldFIP masters are always installed in radiation safe
zones. One master is managing typically around 50 nodes.
The signal of the bus is 5V
We used to purchase the WorldFIP masters and the nodes by the company
Alstom. However Alstom has been gradually
stopping all the WorldFIP support, as new Ethernet based solutions are
At CERN we need to provide WorldFIP support until at least 2035, the
end-of-life of the HL-LHC as it would be very costly to change all the
cabling and the equipment to another radiation-tolerant solution.
The fact that there is no more WorldFIP support by Alstom is the main
reason for the design and support our own WorldFIP equipment at CERN.
The migration of the all the 500 Alstom masters to the new masterFIP
is targeted for the end of 2018, CERN's Long Shutdown 2.
The project has been developed following the Functional
and provides a complete replacement of the Alstom solution for CERN
applications. It is divided into four sub-projects:
Mezzanine board schematic and layout, to be combined with a
31.25Kbps, 1Mbps, 2.5Mbps The FMC supports 5Mbps, but it has not been tested
Front panel connectors
Micro D-Sub 9 for WorldFIP Lemo 00 for input synchronization pulse; sw selectable 50 Ohm termination
Upon a sync pulse from the Lemo, a new macrocycle starts after few us; jitter ~ 100 ns
Front panel LEDs
FMC TX ACT : at the end of a macrocycle there has been no transmission failure FMC TX ERR: at the end of a macrocycle transmission errors have been detected FMC RX ACT: at the end of a macrocycle there has been no reception failure FMC RX ERR: at the end of a macrocycle reception errors have been detected FMC SYNC ACT: application expects sync pulse and it is receiving it successfully FMC SYNC ERR: application expects sync pulse which it is not arriving SPEC GREEN: blinking using the 100 MHz clock SPEC RED: PCIe reset
Four through hole test points (TP) next to the FMC connector TP1: connected to FielDrive RXD TP2: connected to FielDrive TXD TP3: connected to Mock Turtle leds and debug reg bit 8 TP4: connected to Mock Turtle leds and debug reg bit 9