268 Run-time System CODESYS 2.3
WAGO I/O SYSTEM 750 XTR
750-8202/040-001 PFC200 2ETH RS TELE XTR
Manual
Version 1.2.0, valid from FW Version 03.01.07(13)
Table 209: Addressing Example
I/O module Input data
Output data
Description
Type
C
*
750-600
End module
The passive 750-600 end module does not
transmit any data.
Analog input and output modules
Digital input and output modules
*
C: Number of the input/output
8.9
Local Bus Synchronization
The local bus cycle and the CODESYS task cycle are optimally automatically
synchronized: This depends on the number of I/O modules connected and the
fastest CODESYS task cycle set in the fieldbus controller. The synchronization
cases described below can therefore take place.
In this section, CODESYS task denotes only tasks within CODESYS that contain
an access to the local bus. Tasks that do not access the local bus are not
synchronized in the same way as described below. For this, see section
“Creating Tasks.”
8.9.1
Case 1: CODESYS Task Interval Set Smaller than the Local
Bus Cycle
Execution of the CODESYS tasks is synchronized with the local bus cycle time.
The CODESYS task is processed in parallel to the local bus cycle. The
CODESYS task interval is extended to the local bus cycle time. This is necessary
so that each CODESYS task is started with new input data from the local bus and
the output values are also set at the module after each CODESYS task.
Figure 86: Local Bus Synchronization (Case 1)
CTI:
CODESYS Task Interval
CT:
CODESYS Task that accesses the I/O modules via the local bus
LBZ:
Local Bus Cycle
