NOVUS AirGate-GPRS - Manual (Page 24)

AirGate-GPRS
NOVUS AUTOMATION 24/29
The data read in the remote channels are presented in a “raw” format, i.e., no consistency is made in the value read. The
number of decimal points can be configured for the remote channel if the value will be considered with or without a signal
for the use of the alarms.
USB INTERFACE
The AirGate-GPRS has an isolated USB device used for configuration and monitoring. The Windows® operating system
will recognize the equipment as a virtual serial gate, which allows it to be used by Supervisory software (SCADA).
To access it, the USB calble provided should be used. On the first access, it will be necessary to install USB drivers on
your computer. To do that, check the “USB Driver Installation” section.
The communication in this interface is Modbis RTU. The same commands and the same table of registers are available
on this interface (please refer to the chapter “Modbus Commands and Table of Registers”).
SENDING SMS – ALARMS AND STATUS
Up to 8 destinations for text messages (SMS) can be configures to receive equipment information. This information can
be alarm notifications of status information (by event or periodical). The information options that can be received by SMS
are:
• Power on: message the indicates the was turned on.
• Analog channel error: Message that indicates an error in reading the analog channel. It can be enables
individually, in other words, there is a message to indicate and error in analog channel 1 (“Error 1”) and another to
indicate an error in analog channel 2 (“Error 2”).
• Status: Message sent periodically with information of up to 2 channels selected by the user. The selected
channels should be enabled, and can be analog or remote channels. The frequency of the ending can also be
configured.
• Connection state: message sent to indicate the state of the connection. A message is sent to notify that you were
able to connect to the remote serve (“connection” message") and another to state that the connection was lost
(“disconnected” message).
• Alarms: Messages sent whenever a configured alarm condition is met. Up to 8 alarms may be configured, each
with its own alarm message.
Some cell phones may not recognize some characters configured in the messages.
For the registration of each destination, an identification tag (contact) should be configured, the country code and area
code and the phone number. Then, you should select the events and alarms associated with the contacts, i.e., who
should receive each message.
It is possible to choose the kind of header you want in your messages. Standard kind shows the product name (AirGate-
GPRS) nad the serial number of the device. You can customize the header, entering a small text (up to 40 characters)
instead.
SMS sending do not depend on the GPRS service.
ALARMS
There are 8 available alarms with this equipment. Each one of the alarms requires the selection of a channel, a condition,
and a set point (which can be a constant value or another channel). Also, a debounce time for the alarms (the time
interval where a new occurrence of the same alarm is not detected) should be configured. When the alarm condition is
met (for example: Channel_1 > 45.0 ºC), as event is generated that can be associated with the sending of text messages
(SMS) too ne or more destinations. For each selected channel, its actual value is used in the comparison. With digital
channels, the two values associate with logical states will be used. When a channel is in na error state, the configured
error value will be used in the alarm. The channel value to be used will always consider the information of the decimal
point and the configured signal.
If there is more than one alarm, the AirGate-GPRS will send all the active alarms to the configured destinations in the
order of the 1st to the last, and the user can notice a small delay in the receipt of the messages between the configured
numbers.
The minimum amount of time between the sending of messages regarding the occurrence of the same alarm is
configurable in minutes, in order to avoid receiving many messages reporting the occurrence of and alarm with a
marginal condition, where the channel is oscillating around the setpoint. Also, an alarm message may not be resent
before its condition is no longer met, i.e., it must cease its alarm condition before it can begin again.
The available conditions are:
• Grater ( > ): Alarm condition met when the selected channel is greater than the setpoint or that another configured
channel.
• Lesser ( < ): Alarm condition met when the selected channel is less than the set point of than another configured
channel.