WAGO-I/O-SYSTEM 750
e!RUNTIME Runtime Environment 275
750-8207 PFC200 CS 2ETH RS 3G
Manual
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
9.2
CODESYS V3 Priorities
A list of priorities implemented for the controller is provided below as
supplementary information to the CODESYS 3 documentation.
Table 201: CODESYS V3 Priorities
Scheduler Task
Linux
®
Priority
IEC
Priority Remark
Preemptive
scheduling
-
Real-time
range
Local or
fieldbus - HIGH
-95 … -86
Internal data bus (-88)
Mode selector
switch monitoring -85
Task registers changes
to the mode selector
switch and changes
the state of the PLC
application. (start, stop,
reset warm/cold)
CODESYS
watchdog
-83
Execution of the
watchdog functions
Cyclic and event-
controlled IEC task -55 … -53 1 … 3
For real-time tasks
which must not be
influenced in execution
by external interfaces
(e.g., fieldbus).
Local or
fieldbus - MID
-52 … -43
CAN (-52 … -51)
Profibus (-49 … 45)
MODBUS slave/master
(-43)
Cyclic and event-
controlled IEC task -42 … -32 4 … 14
For real-time tasks
which must not
influence fieldbus
communication during
execution.
Local or fieldbus –
LOW
-13 … -4
Fair
scheduling
-
None real-
time range
CODESYS
communication
Back-
ground
(20)
Communication with
the CODESYS
development
environment
Cyclic, event-
controlled and
freewheeling IEC
task
15
Incl. standard priority of
the visualization task