Functions - KEB COMBIVERT G6 Programming Manual

3.

Functions

The CAN protocol is uniformly standardized for the data backup layer. Furthermore, the CAN
in Automation association (CiA) has passed a standard for the higher protocol layer that was
named CAN Application Layer (CAL). Based on this standard the „CAL-based Communica-
tion Profile" (CiA,DS301) was published in September 1995. This standard is the basis for all
CANopen device profiles. In this standard, a certain subset of the CAL standards is selected.
The communication profile defines, among other things, a minimum capability device. That is
the minimum required functionality, which a CANopen node must make available. The pres-
ent CAN interface connection realizes such a minimum capability device.
An important point for every CAN network is the assignment of the telegram numbers (Iden-
tifier). The numbers are limited to 2032 CAN V2.0 A. In the CAL standard an own procedure
has been defined, which processes this assignment dynamically over an own protocol. This
relative complex procedure for the assignment of identifiers is not mandatory for a minimum
capabiltity device and is not integrated into the KEB CAN interface connection. For this case
a more simpler procedure for the arrangement of the identifier assignment is defined in the
communication profile. This procedure is also supported by the KEB CAN interface connec-
tion and looks as follows:
Each inverter receives a clear CAN address, the CAN node ID (fb00). There are two possibil-
ities to determine the CAN node ID:
• If the value of the parameter CAN Node ID (fb00) = 255 (dec):
→ actual CAN Node ID = Node ID (os07) +1
• If the value of the parameter CAN Node ID (fb00) ≠ 255 (dec):
→ actual CAN Node ID = CAN Node ID (fb00)
Info
Attention
Parameter „Node ID" (os07) is always equal to parameter „inverter
address" (sy06).
On delivery all KEB frequency inverters have the inverter address „1".
In case several KEB frequency inverters shall be networked over CAN,
they all must first receive different inverter addresses. This is done e.g.
via the parameter interface or the optional keyboard of the control.
Functions
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