This quantity of data is made up as follows:
● Size of the batch process cell (PCell)
● Number of recipe phases/recipe operations run through Also include multiple processing
in loops.
● Number of recipe parameters
● Number of trends and the number of measured values per trend. Also take into account
the duration of the recording and cycle time.
The following average data quantities can be used for an estimate:
● approx. 1.1 MB for 100 recipe phases
● approx. 0.5 MB for 100 recipe parameters
● approx. 0.05 MB for 1 trend with 300 measured values
● approx. 0.1 MB for 1 trend with 600 measured values
The situation could be critical with the following recipe constellations:
● Recipe phases run through large numbers of loops.
● Incorrect cycle times are configured for trend archives in WinCC.
The number of measured values is calculated from the duration of the trend divided by the
acquisition cycle time (for example 6000 s runtime for the trend / 10 sec. cycle time = 600
measured values). The number of measured values for trends can be limited to approximately
1000 measured values that are adequate for a good overview. A maximum of 50000 measured
values are possible per trend.
Note
A cycle time of 1 second and 24 hours runtime mean 86400 measured values.
A recipe with 1500 recipe phases would result in an archive data size of approximately 30 MB
for approximately 6 hours runtime.
Exceeding the specified recommendations means that batch reports and possibly also the
archiving of batches are no longer possible.
3.7 Security aspects
With the increasing networking of processes in automation, matters concerning all aspects of
IT security are becoming more and more important. Consider all security aspects before
commissioning the hardware and software. You will find information about this with the
following link: www.siemens.com/pcs7-documentation (
http://www.automation.siemens.com/
mcms/industrial-automation-systems-simatic/en/manual-overview/tech-doc-pcs7/Pages/
Default.aspx)
Product introduction and installation
3.7 Security aspects
SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA 75
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