Configuration via SIMATIC Manager
CAN-CBM-DP
Software Manual Rev. 2.0
31
5.3 The Communication Window
5.3.1 Introduction
If the connected CANopen modules are addressed as described in chapter ‘5.1 Course of
Configuration’, each CAN identifier needs its own PLC address. The Communication Window has the
advantage that individual PLC addresses for different Tx-identifiers and different Rx-identifiers can be
used. This is possible, because the identifiers of the CANopen modules are transmitted as parameters
together with the data at each access.
The disadvantage of the Communication Window is the lower data flow, though. Therefore it is
recommendable to use the Communication Window for non-time-critical accesses such as writing the
SDOs after starting up the device.
The data length must always be 16 bytes in the configuration!
The identifier to be used is always ‘FFEF’ hex!
The Communication Window will be described in detail on the following pages.
Note:
The CAN-CBM-DP-module with the order no. C.2844.05 can handle 29-Bit-CAN-identifiers. A 29-
bit identifier requires
four
bytes and bit 29 must be set to ‘1’ (counted 0...31 bits), in order to enable
the module to distinguish between 11-bit and 29-bit identifiers.