maximum call stack size exceeded deutsch

MAXIMUM CALL STACK SIZE EXCEEDED DEUTSCH MANUALS
MAXIMUM CALL STACK SIZE EXCEEDED DEUTSCH MANUAL

Their performance has greatly improved over the years, not only as far as L-Stack size is concerned, but also processing speed, work memory, communication capabilities (e.g. S7-300's have been around since the mid 90's and essentially now exist in their 3rd generation (firmware V3.x). Nicely researched I must say but in the end you would have possibly been better off just checking the technical specification of the CPU model that you intend to use. Does anybody know if the L-stack size in these processors has increased through the years? Can anyone confirm that s7-300 series PLCs have 32KB of L-stack per priority class and 2KB per block max with no further limitations? I would appreciate if someone could let me know what this FAQ is speaking about, if it is outdated or still relevant.

MAXIMUM CALL STACK SIZE EXCEEDED DEUTSCH MANUAL

An older specification manual tells of smaller L-stacks. An older FAQ tells of another parameter which I do not understand, which is the 256 byte limit.

MAXIMUM CALL STACK SIZE EXCEEDED DEUTSCH MANUALS

The recent manuals and specifications all state that I will have 32KB of L-stack for each priority class and 2kB max per block. Which has the data about the smaller L-stacks. Upon looking on the web I found this data in an older version of the specification, from 2003:

32 KB per execution level, 2 KB per block. S7-300 CPU 31xC and CPU 31x: Technical specifications Manualīut in Chapter 9, it confirms that the local data for all 300 series PLCs is: I searched for this manual on this website but did not find this information, the closest I found was, This is extracted from the manual Simatic CPU 31xC and CPU 31x, Technical data.” Test the L stack (the temporary variables) in your program. S7 CPUs change to STOP mode if the permitted L stack size for a program is exceeded.

Here the size of the L-stack was answered to be: I have checked the forums here and have found a thread closely related: I acknowledge that this FAQ was written in 1998, perhaps the L-stack is now larger in these CPUs and the 256 bytes is now increased to 2048 bytes.

Maximum call stack size exceeded deutsch