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108 e!RUNTIME Runtime Environment
9.3
Memory Spaces under e!RUNTIME
The memory spaces in the controller under e!RUNTIME have the following sizes:
•
Program memory:
•
Data memory:
•
Input data:
•
Output data:
•
Flags:
•
Retain:
•
Function block limitation: 12 * 4096 bytes = 48 kbytes
9.3.1
Program and Data Memory
The program memory (also code memory) has a maximum size of 32 MB.
The data memory has a maximum size of 128 MB.
Both areas are separate from each other and are requested when downloading
to the system depending on the scope of the program. If the size limit is
exceeded, it is displayed as an error.
9.3.2
Function Block Limitation
Together with the data memory to be used by the application, memory is required
for the individual program function blocks in the system.
The size of the administration space is calculated from the function block
limitation * 12 (i.e., 4096 Byte * 12).
The actual size of the main memory required in the system for data is the sum of
global program and data memory and function block limitation memory.
9.3.3
Remanent Memory
A total of 128 kbytes of remanent memory is available for the IEC-61131
application.
The remanent section is subdivided into the flag area (memory) and the retain
area.
Figure 27: Remanent Main Memory
Manual
Version 1.1.0, valid from FW Version 03.08.07(20)
WAGO I/O System Compact
751-9301 Compact Controller 100
32 Mbytes
128 Mbytes
64 kbytes
64 kbytes
24 kbytes
104 kbytes
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