Cyclic Tasks; Figure 74: Cyclic Task - WAGO 750-8207 Manual

WAGO-I/O-SYSTEM 750
750-8207 PFC200 CS 2ETH RS 3G
8.4.1

Cyclic Tasks

You can assign a priority for each task in order to establish the task processing
sequence.

Figure 74: Cyclic Task

Order of Task Processing
The priorities given below do not specifiy the order of task processing. The tasks
start in an arbitrary order.
Priority 0 ... 5:
Important arithmetic operations and synchronized access to I/O module process
images are to be carried out as tasks with the highest priorities 0 ... 5. These
tasks are processed fully according to priority and correspond to Linux
priorities
-79 through -74.
Priority 6 ... 20:
Real-time access, such as access to ETHERNET and the file system, to fieldbus
data and to the RS-232 interface (when available) are to be carried out as tasks
with average priorities 6 ... 20. These tasks are processed fully according to
priority and correspond to Linux
Priority 21 ... 31:
Applications such as long-lasting arithmetic operations and non-real-time-
relevant access to ETHERNET and the file system, to fieldbus data and the RS-
232 interface (when provided) are to be carried out as tasks with the lowest
priorities 21 ... 31. No prioritiy distinction is made between tasks of priorities 21
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
Run-time System CODESYS 2.3 239
®
RT priorities -40 through -26.
®
RT
Manual