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6.2 Data Exchange
The Anybus X-gateway CANopen allows for 512 bytes of data in each direction between the controlling
network and the gateway. The first two bytes (the first word) are allocated for a Control/Status word,
decreasing the size of I/O data for CANopen to 510 bytes. The actual amount of data that can be ex-
changed is highly network dependent, see the section on configuration of the PROFIBUS network in
chapter 5.
The control and status words of the module are used by the master of the PROFIBUS network to con-
trol the Anybus X-gateway CANopen and the CANopen network it administers, and to report the sta-
tus back from this network. The rest of the I/O data area is available in the CANopen vendor specific
object area for real-time data transfer using PDOs (Process Data Objects).
Note: The functionality of the Control/Status word differs depending on if the Anybus X-gateway
CANopen interface is configured as a slave or as a master.
Anybus X-gateway CANopen - PROFIBUS
Doc.Rev. 1.02
CANopen Module Specification 23
Doc.Id. SCM-1200-080
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