Can Bus - WMF 5000 S+ Service Manual

Service

2.8.1 CAN bus

Communications between the front panel and the power stage make use of the CAN bus. Depending on the machine equipment level, other component assemblies may
be connected to the CAN bus:
 I/O Board AutoClean
 Cup sensor

Sirup power stage
To prevent reflections and the resulting malfunctions on the CAN bus, it is necessary to terminate the CAN bus with a 120 Ohm terminating resistor at the start and end
points. The terminating resistors for the component assemblies indicated can be switched ON or off via the DIP switch. If one of the component assemblies that
communicates via CAN bus is replaced, then the correct DIP switch setting must always be checked.
When retrofitting a cup sensor, the DIP switch settings on the machine power stage must be adjusted.
Front panel
Machine power stage
Terminating resis-
tor is defined
Autoclean / Cup sensor / Syrup
CAN bus
DIP switch settings
without
with
I/O Board AutoClean
DIP switch settings
without with
Cup sensor / Syrup
Cup sensor
DIP switch settings
without
with
Syrup
24
Syrup
Power stage