CCM12 CANbus
User Manual
11
9M02-7717-A001-EN
Version 3.0
2.2.3.1 Protocols
The CAN interfaces support CANopen and SAE J1939 protocol, as well as lower-level CANbus protocol variants.
Section 0 provides details on CANbus operation.
2.2.3.2 Redundant Controllers
The two CAN controllers operate in a redundant fashion to meet the needs of safety-relevant applications. Two
modes are supported:
•
Parallel Operation:
Both controllers perform identical processing; the same messages are sent
simultaneously on both channels. The recipient nodes are responsible for comparing and validating the
messages.
•
Cross-Monitored Operation:
The slave CAN controller monitors the CAN frames sent by the master and
compares the frames with its own copy of the process data. In case of any discrepancy, the MCU enters
Error mode.
In the case where no redundancy is desired, only the master controller interface is used. Refer to Section 0 for
more details.
2.2.4 RS485
The MCU provides two RS485 ports. These ports are electrically isolated from the system, but they share
the same isolated power supply. In the default configuration, both ports are connected together with
jumpers.
Note:
This interface is currently not implemented as a standard feature. Please contact Cattron with your
requirements.
Figure 8: RS485 interface block diagram
Содержание CattronControl CCM12
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