276 Run-time System CODESYS 2.3
WAGO I/O SYSTEM 750 XTR
750-8202/040-000 PFC200 2ETH RS XTR
Manual
Version 1.2.0, valid from FW Version 03.01.07(13)
8.9.5.1.2 Synchronous Update Mode
In the synchronous update mode the runtime behavior of CODESYS tasks can
be influenced by the local bus. The minimum task interval that can then be
achieved depends on the duration of a local bus cycle. The duration of a local
bus cycle, on the other hand, is based on the I/O modules connected to the bus.
As a rule of thumb: The shorter the local bus structure, the shorter the cycle time
and digital modules are faster than analog or complex ones.
In the event of a local bus error, the CODESYS tasks are blocked until the error
is rectified, i.e., when a local bus cycle has been successfully executed again.
No call-up of local bus status when local bus errors are present!
If a local bus error has occurred, it is not possible to call up the bus status using
KBUS_ERROR_INFORMATION (mod_com.lib) while in the synchronous update
mode.
8.10 Memory Settings in CODESYS
The list below illustrates the standard memory allocation of the PFC200:
•
Program memory:
16 Mbyte (max.)
•
Data memory:
64 Mbytes
•
Input data:
64 kbytes
•
Output data:
64 kbytes
•
Flags:
24 kbytes
•
Retain:
104 kbytes
•
Function block limitation: 12 * 4096 bytes = 48 kbytes
8.10.1 Program Memory
The program memory (also code memory) cannot be configured and is limited to
a maximum of 16 Mbytes. The memory space actually available is based on the
scope of installed applications.
