“Memory Layout” Settings¶
The tab “Memory Layout” contains all information about the memory mapping within the CPU:
The parameters have the following meaning:
| Parameter | Meaning | |
|---|---|---|
| Size (Code) | Code area size (user program) see chapter User program size and operands of AC500 CPUs |
|
| Size per segment (Global) | Data area size (VAR … END_VAR or VAR_GLOBAL & END_VAR) see chapter User program size and operands of AC500 CPUs |
|
| Area (Memory) | Size of the addressable flag area (%M area) see chapter User program size and operands of AC500 CPUs |
|
| Area (Input) | Size of the input process image (%I area) PM5x1: 6000 hex = 24 kB |
|
| Area (Output) | Size of the output process image (%Q area) PM5x1: 6000 hex = 24 kB |
|
| Size (Retain) | Size of the area for retentive data (VAR RETAIN) see chapter User program size and operands of AC500 CPUs |
|
| Retain in own segment | If activated: Retentive data are administered in an own segment | |
| Total size of data memory | Can be ignored, set in firmware | |
| Maximum number of POUs | Maximum number of blocks allowed in the project see chapter User program size and operands of AC500 CPUs |
|
The following applies: - per function - per program - per function block - per data type |
1 POU 1 POU 2 POUs 1 POU |
|
| For library POUs the same number of POUs for the relevant type is valid. | ||
| Maximum number of global data segments | 1 = all global data are administered in one segment. | |
The numbers for the individual areas are required for administration in the firmware. The user cannot change any of these parameters.