262 Run-time System CODESYS 2.3
WAGO-I/O-SYSTEM 750
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)
8.9.5.1.2 Synchronous Update Mode
In the synchronous update mode the runtime behavior of CODESYS tasks can
be influenced by the internal data bus. The minimum task interval that can then
be achieved depends on the duration of an internal data bus cycle. The duration
of an internal data 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 internal data bus
structure, the shorter the cycle time and digital modules are faster than analog or
complex ones.
In the event of an internal data bus error, the CODESYS tasks are blocked until
the error is rectified, i.e., when an internal data bus cycle has been successfully
executed again.
No call-up of internal data bus status when internal data bus errors are
present!
If an internal data bus error has occurred, it is not possible to call up the internal
data 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.
