CB Svendsen FA-20, Руководство пользователя

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Data logging, Serial data:
FA-20 performs data logging of selected subjects from the serial meter telegram, e.g. energy
volume (m
3
) and temperatures of heat/energy-meters. The recommended logging interval is
from 15 minutes to 240 minutes.
FA-20 is not able to communicate with the main station at the same time as serial data is
collected from serial meters. This means that there should be left time between the loggings
for transfer of data. If it is acceptable that no data collection can take place while data is
transferred to the main station the logging interval may be reduced to 2 minutes for serial
data.
Data logging, capacity:
FA-20 performs data logging in a number of buffers from 1 to 12 (programmable from the
main station). Storing is based on the FIFO-principle. Besides buffers for the measurement of
data a buffer for timestamp and marking of data (EDIEL) of each logged measurement is
available. The number of storage spaces available in each buffer depends on the number of
buffers with measurement data:
No. of buffers 1 2 3 4 5 6
No. spaces per buffer 3000 2000 1500 1200 1000 850
No. of days (24 h)(1h logging) 125 83 62 50 41 33
No. of buffers
7 8 9 10 11 12
No. of spaces per buffer 750 650 590 530 490 450
No. of days (24 h)(1h logging) 31 27 24 22 20 18
The FA-20 is remotely programmed from the main station (logging parameters set-up and
selection of buffers to which data is logged). Logging of pulses and serial data are freely
combined.
Logging data is stored in the F-RAM which means that power failures with an
accumulated duration of less than 360days over an 8 year period will not lead to a loss
of data.
Description of communication:
In order to be able to call the FA-20 a working SIM-card has to be inserted. The SIM-card
holds information that enables the FA-20 to connect to a GSM network and a telephone
number to call.
V.110 data call:
By using the communication standard V.110 fast interconnection is established i.e. typically
within 6-9s from the call begins to a connection is established (CONNECT 9600). From here
on data can be transferred with nominally 9600 bit/s. The effective transfer speed is typically
less, partly because of the conditions in the package based network as the GSM-network
represents and shares as a result of sending/receiving conditions.
GPRS communication within APN network:
FA-20 supports GPRS within APN network, where fixed IP addresses are assigned either via
radio server or via the phone operators networking possibilities. GPRS is normally settled pr.
byte plus the GPRS ”transport bytes” without call charge, and GPRS will therefore normally
be cheaper for frequent data repatriation.