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Download Siemens HB 131. 10 B Technical data
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Program Organization Nesting depth You can only nest 62 blocks within one another. If more than 62 blocks are called, the CPU signals an error and goes to the stop mode. Example of nesting depth Program processing level 3 OB 25 OB 2 OB 13 OB 1 PB 1 PB 131 FB 21 FB 131 FB 1 Nesting depth 1 Fig. 3-5 2 3 4 5 6 7 8 9 Example of block nesting depth You can determine the nesting depth of your program as follows: - Add all the organization blocks you have programmed (in the example: 4 OBs). - Add the nesting depth of the individual organization blocks (in the example: 2 + 2 + 1 + 0 = 5). - Add the two amounts together to obtain the program nesting depth (in the example: 4 + 5 = nesting depth 9). It may not exceed a value of 62. CPU 928B Programming Guide C79000-B8576-C898-01 3-9
