P3: Basic PLC Program for SINUMERIK 840D sl
13.3 Reserve resources (timers, counters, FC, FB, DB, I/O)
Basic Functions
846 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
13.3 Reserve resources (timers, counters, FC, FB, DB, I/O)
Reserve resources (timers, counters, FC, FB, DB, I/O)
The components below are reserved for the basic program:
•Timers
No reservation
• Counter
No reservation
• FC, FB, DB
FC 0 to FC 29 and FB 0 to FB 29 are reserved for the basic program. The number range between 1000 and
1023 is also reserved for FCs and FBs. Data blocks DB 1 to DB 62 and DB 71 to DB 80 are reserved. The
number range 1000 to 1099 is also reserved in addition for DB. The data blocks of channels, axes/spindles
and tool management functions that are not activated may be assigned as desired by the user.
• I/O range
The PLC has an I/O address volume of 8192 bytes each for inputs and outputs. The address ranges starting
at 4096 / 4096 are reserved for/occupied by integrated drives. However, diagnostic addresses for modules
can be assigned to the highest address range as proposed by STEP 7. Furthermore, the address range
between 256 and 287 is assigned for the NCK, CP and HMI in rack 0 on the SIMATIC 300 station.
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