560-2136 | Siemens Global Memory Card

The CPU memory areas and the load memory on the SIMATIC memory card. In addition to the load memory, the SIMATIC memory card may also contain other data, such as recipes, Data Logs and HMI backups. The work memory is volatile memory that contains the code and data blocks. The workmemory is integrated into the CPU and cannot be extended.In the S7-1500 CPUs, the work memory is divided into two areas:● Code work memory: The code work memory contains runtime-relevant parts of theprogram code.● Data work memory: The data work memory contains the runtime-relevant parts of thedata blocks and technology objects. At the operating mode transitions POWER ON tostartup and STOP to startup, tags from global data blocks, instance data blocks andtechnology objects are initialized with their start values; retentive tags retain their actualvalues as saved in the retentive memory.