User Manual

Table Of Contents
82 Fieldbus-specific Additions
CANopen
WAGO-I/O-SYSTEM 750
I/O Modules
5 Fieldbus-specific Additions
5.1 CANopen
5.1.1 Process Image Access
The CANopen master accesses the Bluetooth
®
mailbox and process data in the
coupler/controller using process data objects (PDOs).
In the standard configuration, the Bluetooth
®
module data is mapped in serial
PDOs. Each PDO can take up eight bytes of data. The maximum Bluetooth
®
module process image of 48 bytes therefore includes six PDOs.
……
0 1 2...7* 8...47*
40 47
0
7
7
16 23
8
15
24
31
32 39
process image
Bluetooth module
PDO for cyclical data
PDO for cyclical data
PDO for cyclical data
PDO for cyclical data
PDO for cyclical data
PDO for status-/control-
byte and mailbox or
cyclical data
Process data
Mailbox
data
zyclicalazyclical
control-/statusbyte
internal byte
* Example with 48 bytes process data, mailbox data 6 bytes (max. for CANopen)
Figure 36: PDO allocation of a Bluetooth
®
module g064468e
The first PDO allocated to a Bluetooth
®
module contains the control/status
byte, an empty byte and up to six bytes of mailbox or process data. The fol-
lowing PDOs contain Bluetooth
®
process data.
Note
If using a CANopen coupler/controller, the maximum mailbox size is lim-
ited to six bytes.