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saia-pcd.com
Header,ref.MemoryM1
HDLog File 3.0
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2
Communication
& Interaction
SBC S-Web Technology
1
SBC Software
3
SBC S-Web Technology
4
Room automation
Memory requirement for trend data
Recorded using CSV files in flash file system
The trend data are saved in groups of max. 10 data points per Saia PG5® Fupla FBox and CSV file.
Saia PG5® Fupla FBox
records and saves up to
10 data points
A CSV file is generated for each FBox with max.
10 data point values per entry. The memory requirement
for one entry: approx. 30 Byte (time stamp) + 10 Byte/data
point
Trend display in the web browser.
A max. of 10 trend curves can be
displayed per window
In the following sample calculation, 20 data points are recorded for visualisation in trend curves. 10 data points should be
recorded for the optimisation phase at intervals of 1 minute and a further 10 data points should be recorded for long-term
monitoring at intervals of 15 minutes.
The memory requirement for 10 data points at 1 minute intervals in one day:
60 (mins) × 24 (hours) × [30 Byte (timestamp) + 10 (data points) × 10 Byte]
= 187.2 kByte per day
With this quantity of data it is worth creating a new file every day.
The data should be stored in the controller for a month.
This produces a memory requirement of approx. 30 × 187.2 kByte
= 5.616 MB per month divided among 30 files.
The memory requirement for 10 data points at 15 minute intervals in one day:
4 (15 min.) × 24 (hours) × [30 Byte (timestamp) + 10 (data points) × 10 Byte]
= 12.48 kByte per day
With this quantity of data, a new file can be created each week
7
× 12.48 = 87.36 kByte per week
The data should be stored in the PCD for a year.
This produces a memory requirement of approx. 52 (weeks)× 87.36 kByte
= 4.53 MB per year divided among 52 files.
A Saia PCD3.Mxx60 CPU can record 10 data
points for up to 6 years for long-term monitor-
ing in the 128 MB onboard flash memory.
The programmable PCD7.D4xxxT5F micro-
browser panel and the PCD1.M2160 both
also have a large onboard flash memory and
are ideal for monitoring tasks. The plug-in
PCD7.R-SDxxxx SD flash card with a memory
capacity of up to 1 GB lasts even longer and
can store data for decades in a Saia PCD®
controller.
Onboard
memory for
6 years
of
data moni-
toring
What type of memory modules should be used?
Web pages and log data can be stored in the onboard flash
memory and/or the plug-in flash cards.
The web projects and basic data logging with small quanti-
ties of data can be stored on the onboard flash memory (de-
pending on the type of CPU) or the plug-in
PCD7.R55xM04
flash memory module. Unlike the onboard memory, flash
cards can be exchanged and replaced with new cards. It is
therefore easy to archive data or transfer it from one control-
ler to another.
Only the
PCD7.R-SDxxxx
SD flash card module should be
used for intensive data logging.
PCD7.R-SDxxxx
PCD7.R55xM04
Important information for using the flash memory module
A max. 900 files are supported in a memory module.
S-Web uses up to 70% of the nominal physical memory.
The size of a single file should not exceed 1 MB.
This guarantees that all the files can be sent via the Saia PCD® as email attachments.
The calculation examples are reference values without BACnet or L
on
communication.
