Siemens SINUMERIK 840D sl Function Manual page 1065

2.9.4 Assignment: Timers
Timer No.
0 - 9
10 – 127
Note
The actual upper limit of the block number (timer) depends on the active PLC CPU which is
located in the selected NCU. See section "Key data of PLC CPUs for 810D, 840D".
2.10 Memory requirements of basic PLC program for 840D
General
The basic program consists of basic and optional functions. The basic functions include
cyclic signal exchange between the NC and PLC.
The options include, for example, the FCs, which can be used if required.
The table below lists the memory requirements for the basic functions and the options. The
data quoted represent guide values, the actual values depend on the current software
version.
Memory requirements of blocks with SINUMERIK 840D
Block Function
type no.
Basic functions in basic program
FB 1, 15, 16, 17,
18
FC 1, 2, 3, 4, 11,
20
DB 4, 5, 7, 8, 17,
19
DB 2, 3, 6
OB 1, 40, 100
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.10 Memory requirements of basic PLC program for 840D
Meaning
Reserved for Siemens
User area
Remark
Must be loaded
Must be loaded
Must be loaded
Are generated by the BP
Must be loaded
Total
Detailed description
Block size (bytes)
Load Working
memory memory
3616 3052
7208 6608
2490 966
992 812
490 282
14796 11720
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