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immediately (see “Repeated SMS” and “SMS delay” items in
“Interface configuration” section). This feature has been intro-
duced to prevent loosing of warning messages due for example
to overload of telephone lines; “Repeated SMS” item represents
the number of repeated SMSs to send, while “SMS delay” item
sets the delay time between two subsequent alarm messages.
INFORMATION SMSs
In addition to the alarm messages already described, the cellu-
lar phone interface can send information messages upon request.
These messages include all relevant information that can be
got from the controlled instruments, and could be requested,
for example, after an alarm message regarding an error which
should close without any intervention. The user could also want
to be informed about the values of the measured magnitudes
or current devices status.
The information messages can be requested:
1. by making a call from one of the phone numbers programmed
for alarm messages sending: in this case the cellular phone
interface recognizes the calling phone number, hangs up
without answering and then sends to the calling number
one information message for each controlled instrument;
2. by sending an SMS from whatever cellular phone to the
device. The message must have the following format:
“P<CELLULAR PHONE INTERFACE PASSWORD>”, i.e.
the uppercase P letter followed by the cellular phone inter-
face password in uppercase letters; if the password is
disabled, just “P” is enough. Upon this requesting mes-
sage, the interface will send one information message for
each controlled instrument to the cellular phone which
issued the requesting SMS.
Information SMSs for HI142 dataloggers
The format of the information messages for
HI142
dataloggers
is very similar to the one for alarm messages. The only differ-
ence is the “Info: <INFORMATION SPECIFIC TO THE IN-
STRUMENT>” string instead of “Alarms: <ALARM SPECIFIC
TO THE INSTRUMENT>” (see previous subsection for details).
The format of information messages for
HI142
will be:
“HI142-SN<DEVICE SERIAL NUMBER>; LotlD<USER LOT
ID>; Info: <INFORMATION SPECIFIC TO THE INSTRU-
MENT>; Rem msg: <NUMBER OF REMAINING MES-
SAGES>”.
Alarm SMSs specific to the interface
Two alarm SMSs are provided to inform the user about troubles
specific to the
HI504903
interface, the first one concerning
the internal backup battery status, the second one about mains
power supply status.
If a problem was found during last battery test (see “Fault con-
ditions and selftest procedures” section),
HI504903
issues the
following alarm SMS: “Alarm! Battery test failure; Rem msg:
<NUMBER OF REMAINING MESSAGES>”. After user con-
firmation of message reception (see further on),
HI504903
will send back the SMS: “Battery test failure; Rem msg: <NUM-
BER OF REMAINING MESSAGES>”.
Instead, in case of mains power failure (see “Power failure”
section),
HI504903
issues the following alarm SMS: “Alarm!
Power failure; Rem msg: <NUMBER OF REMAINING MES-
SAGES>”. After user confirmation of message reception (see
further on),
HI504903
will send back the SMS: “Power fail-
ure; Rem msg: <NUMBER OF REMAINING MESSAGES>”.
After a power failure event, when the mains power supply comes
back, the following message will be sent to the set phone
number(s) without any request: “Power is ok now; Rem msg:
<NUMBER OF REMAINING MESSAGES>” (this message
does
not need
confirmation by the user; see further on).
Note
After submission of an alarm message, a phone call is made by
the instrument to the programmed number(s). This is done be-
cause the SMS can be received with a considerable delay due
to network overload, while the phone call takes place immedi-
ately and has a long ring, which is more likely to be heard. The
phone call advises the user that something happened on the
HI504903
(or on one of the connected instruments) and an
SMS is going to be received. It is not necessary to answer this
phone call and it is suggested to simply close it. When an error
occurs (and an alarm SMS is sent), the interface wait for a
confirmation of the message reception. The confirmation can
be done calling the
HI504903
phone number (number for
voice call of the GSM module). The interface will answer hang-
ing up the incoming call and send one or more SMSs about the
status of all instruments connected to the
HI504903
interface
(this confirmation is managed as an information request; see
further on for details). It is also possible to configure the instru-
ment to send repeated messages if confirmation is not received
