Siemens sinamics dcp - 7.19.3 Memory load through DCC

Operation
7.19 Drive Control Chart (DCC)
SINAMICS DCP
Operating Instructions, 09/2019, A5E34382853K
381
7.19.3 Memory load through DCC
Along with the CPU time load, the memory load of the processor must also be considered
when designing a closed-loop control with the DCC technology option. A higher number of
configured DCC blocks and @parameters also more highly loads the internal memory
(ROM) of the CUD.
For using DCC, on the SINAMICS DCP, when compared to the maximum possible
configurations documented in the "Maximum configuration" chapter, depending on the size
of the diagram, optional components must be eliminated. The number of blocks and the
@parameters are decisive.
For one CUD without additional options, the following rules apply.
Table 7- 83 Maximum number of DCC blocks and @parameters
Drive object
Number of DCC blocks and @parameters
CU_DCP
800
DCP_CTRL
600
Note
The specified maximum numbers for bloc
ks and @parameters always apply for the entire
drive unit and should be regarded as guide values. The CUD is completely utilized with 800
DCC blocks and @parameters on the DO CU_DCP or 600 DCC blocks and @parameters
on
the DO DCP_CTRL. Conserving @paramete
rs has little effect on the quantity structure of
the blocks; the specified maximum numbers for the blocks should therefore not be
exceeded.
On the DO DCP_CTRL, due to the large number of drive parameters, fewer DCC blocks can
be computed than on the DO CU_DCP.
In addition, the memory is loaded by optional components as follows:
Table 7- 84 Additional memory load through optional components
Component
Additional memory load
(expressed in DCC blocks)
TM31
- 150 blocks
TM15
- 150 blocks
TM150
- 150 blocks
CBE20
- 25 blocks
The final limits are determined by the total memory available on the CUD. If the previously
mentioned recommended maximum limits are exceeded, this can result in errors during
upload or download (e.g. fault F1105: CU memory insufficient) and the drive can no longer
be switched on; POWER OFF/ON must be performed on the drive unit.
Note
In most cases, the CPU time load of the CUD becomes the limiting factor when designing
the DCC application and n
ot the memory load.