NOVUS AirGate-GPRS - Manual (Page 25)

AirGate-GPRS
NOVUS AUTOMATION 25/29
The alarm condition should remain at least 100 ms to ensure it is detected. Also, it is important to remember that the
analog channels may have a delay in measuring the real input value, depending on the interval between readings and
configured filter, among others. The remote channels however, depend directly of the configured sweeping interval.
Thus, these specific types of channels can offer an additional latency in detecting the alarm condition.
Upon starting the device, there is no reliable information on the channels. With the analog channels and the remote
channels, you should wait for the first sweep to be completed so the channel values will be available. Therefore, the
alarms that use these types of channels can take some time until they can make the comparison with the configured set
point. In the specific case of the remote channels, depending on the configuration used, a full sweep of all of the
channels can take several seconds.
SMS EXAMPLES
These are some examples of messages (SMS) received by a cell phone. On these examples, the serial number
13028555 AirGate-GPRS was configured with the name (title) “Remote-03”.
“Power On” message
“Connection” message
“Status” message
“Alarm” message
“Channel Error” message
DATA COMMUNICATION AND ROUTING
The AirGate-GPRS has several communication interfaces. Among them, we can highlight some that can be used as
Modbus slaves:
• RS485, acting as a slave in the Modbus RTU protocol.