CB Svendsen FA-20, Руководство пользователя

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FA-20's signal programs for the green and the red LED:
(The big LED’s visible through the lid).
Green LED tells about the current operational situation:
A. Green light permanent ON:
FA-20 is communicating via the GSM/GPRS-modem.
B. Green LED flashes (0.5s ON and 0.5s OFF):
FA-20 waits for next activity, reading of meters, dial-back or ringing signal.
C. Green LED turned OFF for a short while (5-30s) :
Reading of serial meter is in progress.
D. Green LED remains OFF:
Indicates that normal operation has stopped. This could be due to power failure or that
FA-20 has acknowledge an internal error - beyond FA-20 capability to fix (red LED:
permanently ON or flashing).
E. After engagement of power the green LED flashes fast, while the FA-20s computer
starts up and writes parameters to the GSM / GPRS modem.
F. After keystroke the green LED flashes once briefly per second by reading the meter on
the port M1, two times briefly per second by reading the meter on the port M2 and
three times briefly by reading the meter on the port MULTI.
Red LED (pulse received or error recognition):
A. Red LED flashes once briefly after each pulse. The flash is computer controlled and
does only appear, if the pulse is approved as a genuine pulse with correct minimum
pulse length etc.
B. Red LED is ON for 3 sec.: Failure without any permanent influence on normal operation:
1. A serial reading of a meter failed.
2. Data communication with the main station failed.
3. Brief power failure.
More atypical, internal errors (Watchdog, illegal upcode trap, clock monitor, software
interrupt error and main routine security timer) activate red LED in 3 seconds. These
internal errors are normally handled by the FA-20 and are stored in the internal
operational-error registry. Operational-errors will be transferred to the main station at
every communication.
C. Red LED remains ON and green light flashing:
Red LED lights up and stays lit in case of all dial-back calls have been spent (up to 10
unsuccessful attempts in succession to call). A completed communication, made either
by means of keystroke or a call from the main station, will resume the red LED as well as
the dial back routine to normal condition.
D. Red LED remains ON and green LED remains OFF: Fatal error:
CRC errors for operating parameters in the EEPROM are the only error that leads to the
FA-20 stops normal operation and activates emergency operation. A CRC error means
that the operating parameters, such as phone numbers may not be correct anymore.
The emergency program only allows ringing signal, and only if the operating parameters
re-established the communication, the FA-20 resume normal operation. CRC errors can
usually not be erased by disconnecting the power supply to the FA-20.