Siemens SIMATIC PCS 7 Configuration Manual

You proceed in exactly the same way for "TagLogging Slow". You have calculated a mean
value of 100 archive values/s for TagLogging Slow.
● The maximum size for all segments is calculated as follows:
– Where a memory requirement of 16 bytes per measured value is assumed:
approx. 8 GB
(100 archive values/s * 16 bytes/value * 60 s/min * 60 min/h * 24 h/day * 31 days/month
* 2 months)
– Where a memory requirement of 6 bytes per measured value is assumed:
approx. 3 GB
(100 archive values/s * 6 bytes/value * 60 s/min * 60 min/h * 24 h/day * 31 days/month
* 2 months)
In our example, we have selected 5 GB.
● The following is calculated for a single segment per day:
– Where a memory requirement of 16 bytes per measured value is assumed:
approx. 130 MB
(100 archive values/s * 16 bytes/value * 60 s/min * 60 min/h * 24 h/day * 1 day)
– Where a memory requirement of 6 bytes per measured value is assumed:
approx. 50 MB
(100 archive values/s * 6 bytes/value * 60 s/min * 60 min/h * 24 h/day * 1 day)
In our example, we have selected 100 MB.
You must then make the following corresponding settings in the "TagLogging Slow"
configuration of the "TagLogging" editor:
Configuring OS functions
10.4 Archiving
Compendium Part A - Configuration Guidelines (V8.2)
Configuration Manual, 08/2016, A5E38166869-AA 255

Siemens SIMATIC PCS 7 Specifications

General

Brand	Siemens
Model	SIMATIC PCS 7
Category	Control Systems
Language	English