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Communication &
Interaction
SBC S-Web Technology
1
SBC Software
3
SBC S-Web Technology
Memory requirement for trend data
Recorded using CSV files in flash file system
The trend data are stored in groups of max. 10 data points per Saia PG5® Fupla FBox and CSV file.
S
The Saia PG5® Fupla FBox
can record and store
up to 10 data points
S
One CSV file is created per FBox with max. 10 data point
values per entry. The memory requirement for one entry:
approx. 30 Byte (time stamp) + 10 Byte/data point
S
Trend display in web browser. A max.
of 10 trend curves can be displayed per
window.
In the following calculation example, 20 data points are recorded for visualisation in trend curves. Ten 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 (time stamp) + 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 gives a memory requirement of approx. 30 × 187.2 kByte
= 5.616 MByte per month divided among 30 files.
The memory requirement for 10 data points at 15 minute intervals in one day:
4 (15 mins) × 24 (hours) × [30 Byte (time stamp) + 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 gives a memory requirement of approx. 52 (weeks) × 87.36 kByte
= 4.543 MByte per year divided among 52 files.
A Saia PCD3.Mxx60 CPU can record 10
data points for up to 6 years for long-term
monitoring in the 128 MByte onboard
flash memory. The programmable
PCD7.D4xxxT5F SBC 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 GByte lasts
even longer and can store data for decades
in a Saia PCD® controller.
Onboard
memory
for
6 years
of data
monitoring
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
quantities of data can be stored on the onboard flash
memory (depending 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 controller 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 memory module supports max. 900 files.
S-Web uses up to 70% of the nominal physical memory.
The size of a single file should not exceed 1 MByte. 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.
