Fieldbus-Specific Additions; Canopen; Process Image Access - WAGO I/O-SYSTEM 750 Manual

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Fieldbus-specific Additions

CANopen

5 Fieldbus-specific Additions
5.1 CANopen

5.1.1 Process Image Access

The CANopen master accesses the Bluetooth
coupler/controller using process data objects (PDOs).
In the standard configuration, the Bluetooth
PDOs. Each PDO can take up eight bytes of data. The maximum Bluetooth
module process image of 48 bytes therefore includes six PDOs.
Figure 36: PDO allocation of a Bluetooth
The first PDO allocated to a Bluetooth
byte, an empty byte and up to six bytes of mailbox or process data. The fol-
lowing PDOs contain Bluetooth
Note
If using a CANopen coupler/controller, the maximum mailbox size is lim-
ited to six bytes.
...
process image
Bluetooth module
PDO for status-/control-
byte and mailbox or
cyclical data
PDO for cyclical data
PDO for cyclical data
PDO for cyclical data
PDO for cyclical data
* Example with 48 bytes process data, mailbox data 6 bytes (max. for CANopen)
®
mailbox and process data in the
®
module data is mapped in serial
control-/statusbyte
internal byte
Mailbox
Process data
data
azyclical zyclical
0 1 2...7* 8...47*
7
0 7
8 15
16
24
32
PDO for cyclical data
40
®
module
®
module contains the control/status
®
process data.
...
23
31
39
47
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I/O Modules
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