HyQuest Solutions iRIS Under Cover, Руководство пользователя

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Introduction
1.4.5 Logged Data Array Identification
Each sensor’s logged data is identified by an array ID number. For the primary logged data, the ID is the sensor number
itself. For the optional supplementary data (min, max, deviation, flow/vol), the array ID has an offset added to the sensor
number that it is associated with. These ID offsets are as follows:
Minimum: +20
Maximum: +40
Deviation: +80
Flow/Volume +100
Check Count +120
For example, Sensor 4 has been configured to log the average value, plus the maximum and standard deviation. Three
data arrays will be logged for this sensor at each logging interval with IDs of 4, 44 and 84 respectively. In HydroTel™ or
SODA these require point identifiers of 4, 44 and 84 respectively.
Array 0 (zero) is a special array identifier and is used as a system event log. Currently this is only used to log
a restart (either at the initial connection of power, on a watchdog reset or a user program start after an
upgrade). The logged value in this case contains a value that can be decoded to determine the cause of the
restart. In HydroTel the identifier for this item is 0.
1.4.6 Alarm Processing
There is a “pool” of up to 40 free-format alarms. These can be assigned to any virtual sensor. So it is possible to have two
alarms on every sensor or else more on some sensors and less or none on others. Each alarm has separate trigger and
reset levels, an activation delay or accumulation period depending upon the data type, comms interval, enable call-in and
an option to send a customised SMS text to a specified number when the alarm is triggered.
Each sensor has an associated flag that is set if any alarm on the sensor is active. This can be used to vary the logging rate
for the sensor. For example, taking more frequent logs when water level is high compared to a less frequent “routine” log
in normal conditions.
The iRIS also maintains a global “alarms active” flag that is set if any alarm on any sensor in the device is active. This is
used to trigger a call-in or data transfer to the designated host. As well as the call-in, this flag can also control the digital
outputs.
1.4.7 Real Time Clock & Calendar
The iRIS has a non-volatile real time clock that can be read and/or synchronised using HydroTel™ or iLink 3.