Siemens SINAMICS DCM Manual page 622

10.34 CPU time load with SINAMICS DCM
The CPU time load of the SINAMICS DCM can be read out at r9976[1]. Principally, the
following rules apply:
1. The cyclic DC closed-loop control of the SINAMICS DCM generates a base load of
approx. 70% (can be read on r9976[1]).
2. The use of peripherals (AOP30, starter, M15, TM31, TM150, SCM30, CBE20, etc.),
certain settings in the closed-loop control and/or use of the free function blocks along with
the DCC technology option increases this base load. The additional CPU time load
through the main components is summarized in the table below.
3. The CPU time load must not exceed a utilization of 100% at r9976[1].
At a CPU time load of >100% on r9976[1], the correct functioning of the drive is no
longer ensured.
Note
When the time load of the CUD is too high (r9976[1] >100%), fault F60099 (in extreme
cases F01205) is output (time slice overflow). In such a case, the drive needs to be
switched off and then back on again (POWER OFF / POWER ON).
The CPU time load must be taken into consideration when configuring and commissioning
the SINAMICS DCM.
Table 10- 60 Additional CPU time load through optional components
Component
AOP30 via PPI
1 TM31
2 TM31
3 TM31
1 TM15
2 TM15
3 TM15
1 TM150
2 TM150
3 TM150
1 SMC30
1 CBE20
Internal encoder (p50083=2)
Parallel interface
Peer-to-peer
Calculating the thyristor blocking voltage
Is supported by the CCP
Memory card inserted
SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
WARNING
ac.maher.co.ir
Descriptions of functions
10.34 CPU time load with SINAMICS DCM
Additional CPU time load
+4%
+4%
+5%
+6%
+1%
+1.5%
+2%
+1%
+1.5%
+2%
+2%
+1%
+2%
+4%
+4%
+4.5%
+3.5%
+1%
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