CM CAN Combo
User Manual
52
Event
: two options are available as event: send the message on a
CAN or CAN FD. This has to match with the configuration of the
chosen CAN-port as
Bus
.
Bus
: Here the CAN-port must be chosen, on which the event should
be send.
MsgId
: This is the CAN-ID, the event message will be sent with. It is a Hexadecimal
value
Length
: length of the payload of the CAN message.
Length
and
Payload
must match.
Payload
: value of the payload.
Length
and
Payload
must match.
4.8
Synchronisation of several devices by PTP (802.1AS)
802.1AS is a protocol used between two or more devices to synchronize all of them
through an Ethernet communication. This synchronization allows two or more devices
(one master and one or multiple slaves) to transmit/receive time-critical information
through a physical link and assures that all the devices will handle the same time
reference. By the example of the CaptureModules it is the timestamping of logged
data. The CaptureModules allow a synchronization between each other and other
devices by 802.1AS PTP.
4.8.1
Transport of time-synchronization information
For the reference case where this communication is established only between two
devices,
„Time
-aware system i-
1“ configured as 802.1as master and „Time
-aware
system i+1“ configured
as slave, the ports of the CaptureModule
(„Time
-aware system
I”) implements additionally then the respective opposite sides of
the communication,
one slave port and one master port, as shown in the next image.