Observator Instruments OMC-045-II User manual

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OBSERVATOR
Instruments
Technical User Manual
OMC-045-II
OMC-045-II Technical User Manual
Version : 1.03
Author : RvdK /AV
Editor : TDC-HB
Datum : 26-08-2009

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OMC-045-II
Index
Index............................................................................................................................................................. 2
Foreword....................................................................................................................................................... 5
Preface ......................................................................................................................................................... 6
1Description.......................................................................................................................................... 7
1.1General............................................................................................................................................... 7
1.2Versions.............................................................................................................................................. 8
1.2.1 What’s in the box?.................................................................................................................... 8
1.2.2 OMC-045-II-DIN........................................................................................................................ 8
1.2.3 OMC-045-II-Rain ...................................................................................................................... 8
1.2.4 OMC-045-II-Lithium.................................................................................................................. 8
1.2.5 OMC-045-II-Shoebox................................................................................................................ 8
1.3Type serial plate/sticker...................................................................................................................... 9
2Starting with the OMC-045-II............................................................................................................ 10
2.1Handling precautions........................................................................................................................ 10
2.2Qualification of the engineer............................................................................................................. 10
2.3Preparation....................................................................................................................................... 10
2.4Power on for the first time ................................................................................................................ 11
2.5Connect to a PC............................................................................................................................... 11
2.6Connections (general)...................................................................................................................... 12
X2 Connector Layout: power inputs, power outputs, and display ................................................... 12
X3 Connector Layout: digital inputs and communication ports ....................................................... 13
X4 Connector Layout: analogue inputs and alarm outputs ............................................................. 13
3Safety ............................................................................................................................................... 14
3.1Power supply.................................................................................................................................... 14
3.2ESD14
Transport and Storage................................................................................................................................ 15
4Mounting and installation.................................................................................................................. 16
4.1What is in the box............................................................................................................................. 16
4.2Vibrations.......................................................................................................................................... 16
4.3Connectors....................................................................................................................................... 16
4.4DIN Rail............................................................................................................................................ 16
4.5Cabinet............................................................................................................................................. 16
4.6Example System Cabinet................................................................................................................. 17
5To put in use..................................................................................................................................... 18
6Controlling and usage of the data logger......................................................................................... 19
6.1The data logger................................................................................................................................ 19
6.1.1 Power Delay ........................................................................................................................... 19
6.2Working of the scheduler.................................................................................................................. 20
6.2.1 Synchronization...................................................................................................................... 20
6.2.2 Alarm....................................................................................................................................... 20
6.2.3 Scheduling Input task ............................................................................................................. 21
6.2.4 Scheduling Output task........................................................................................................... 21
6.2.5 Scheduling Editing task .......................................................................................................... 21
6.2.6 Synchronization Editing and output tasks............................................................................... 21
6.3Operating Mode................................................................................................................................ 22
6.3.1 Operating Mode System Low Power...................................................................................... 22
6.3.2 Operating Mode System always on........................................................................................ 22
6.3.3 Operating Mode Sensor always on ........................................................................................ 22
6.3.4 Operating Mode Sensor Low Power....................................................................................... 22
6.3.5 Operating Mode Modem Always On....................................................................................... 22
6.3.6 Operating Mode Modem Low Power...................................................................................... 22
6.4System Tasks................................................................................................................................... 23
6.4.1 Low power .............................................................................................................................. 23
6.4.2 Modem.................................................................................................................................... 23

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6.4.3 Alarms..................................................................................................................................... 23
6.4.4 System Error SMS.................................................................................................................. 23
6.4.5 PC Communication................................................................................................................. 24
6.4.6 Completing SD card................................................................................................................ 24
6.5Log File............................................................................................................................................. 25
6.5.1 Data lines................................................................................................................................ 25
6.5.2 X Data lines ............................................................................................................................ 25
6.5.3 System lines ........................................................................................................................... 25
6.6Sending the log file........................................................................................................................... 26
6.7Data buffer........................................................................................................................................ 26
6.8Input drivers...................................................................................................................................... 27
6.8.1 Analog sensors....................................................................................................................... 27
6.8.2 Digital sensors........................................................................................................................ 27
Rain meter ....................................................................................................................................... 27
Float lever........................................................................................................................................ 27
Serial sensors.................................................................................................................................. 28
Wind information.............................................................................................................................. 28
Generic Serial interface................................................................................................................... 28
6.9Power supply, power connections, backup power, power consumption.......................................... 29
6.9.1 Connection of 8 – 30 V power ................................................................................................ 29
6.9.2 Connection of 3.6V power ...................................................................................................... 29
6.9.3 Internal RTC backup battery................................................................................................... 29
6.10 LED function............................................................................................................................. 29
6.11 Sensor connections.................................................................................................................. 30
6.11.1 Digital inputs:...................................................................................................................... 30
Status switch.................................................................................................................................... 30
OMC-210 rain gauge....................................................................................................................... 30
6.11.2 Analogue............................................................................................................................. 31
OMC-350 water level meter (potentiometer)................................................................................... 31
4-20 mA sensor (2-wire).................................................................................................................. 31
OMC-506 ......................................................................................................................................... 31
6.11.3 Serial................................................................................................................................... 32
YSI 6-series ..................................................................................................................................... 32
SONTEK Argonaut .......................................................................................................................... 32
Nortek AWAC................................................................................................................................... 32
7Errors................................................................................................................................................ 33
7.1Analog sensor .................................................................................................................................. 33
7.2Digital Input....................................................................................................................................... 33
7.3Serial input........................................................................................................................................ 33
7.4GPRS, GSM and SIM card............................................................................................................... 34
7.4.1 FTP messages without data................................................................................................... 36
7.4.2 Antenna placement and field strength.................................................................................... 36
7.4.3 Field strength.......................................................................................................................... 36
7.4.4 SIM card Compatibility............................................................................................................ 37
7.4.5 (Re)Placement of the SIM ...................................................................................................... 37
7.5GPS Errors....................................................................................................................................... 38
7.6Storing Data log................................................................................................................................ 39
7.6.1 Media compatibility................................................................................................................. 39
7.6.2 Placement / replacement procedure for SD card................................................................... 39
7.7Data retrieval from SD card.............................................................................................................. 40
7.8System errors................................................................................................................................... 40
8Maintenance en cleaning ................................................................................................................. 41
8.1Configuration via HyperTerminal...................................................................................................... 41
8.2Configuration and Firmware Upgrade procedures........................................................................... 41
9Environment and disposal................................................................................................................ 42
10 Specifications ................................................................................................................................... 43
11 EU Declaration of Conformity........................................................................................................... 45

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12 Appendix........................................................................................................................................... 46
12.1 Explanation email format OMC-410 and OMC-045-II .............................................................. 47
12.2 Example 1 Email....................................................................................................................... 49
12.3 Example 2 E-mail with system lines......................................................................................... 50
12.4 Instructions to format an SD for use in the OMC-045-II Using WinHex................................... 51
12.5 Sensor specific information ...................................................................................................... 55
12.5.1 OMC-210 rain gauge.......................................................................................................... 56
12.5.2 Nortek AWAC .....................................................................................................................57

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OMC-045-II
Foreword
This manual must be used in conjunction with the OMC-Programmer manual
This manual describes the (hardware) installation.
OMC-Programmer is used for the necessary software configuration of the OMC-045-II.
This manual is useful for system planning, installation and reference on the OMC-045-II. It covers the
hardware aspects of the OMC-045-II.
We recommend you to read this manual carefully before installation of the OMC-045-II.
This symbol is for important information

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Preface
The OMC-045-II is used for collecting data and processing it. The data can be send through GPRS. For
this function you need a SIM card.
Important:
Disable the PIN code (use a mobile phone to check / disable the code)
Check the settings of the mobile provider
Check the settings for the communication with the FTP/Mail server
Check if the mobile provider accepts FTP/Mail communication
.
Mechanical changes to the OMC-045-II, has to be preformed inside a protected surrounding. Contact with
high air humidity, sweet and salt water has to be avoided
Warning ESD: By ignoring the ESD instructions, you can damage the OMC-045-II. This can create
indefinable behavior. This is difficult or impossible to repair.
The OMC-045-II has to be assembled inside a cabin on a DIN rail. In case this cabin is located outside, it
has to be IP65. For (near) sea / offshore locations, it must be IP66!
It is required to have knowledge of the sensors you would like to connect, since you have to configure
them via OMC-programmer.
Examples can be found in the appendix.

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1Description
1.1 General
The OMC-045-II is a multipurpose data acquisition platform with integrated GPRS modem and GPS
receiver. The OMC/045-II is intended for measurement of environmental parameters, e.g. for hydrological
and meteorological applications.
The connections are divided over three clasping connector rows.
X2 The row that contains mostly power connectors.
X3 The row that contains digital inputs and serial
communication
X4 The row that contains connections for analog sensors
and alarm contacts.
All configurations are been made through port X1. This is a USB
connection. This connection has to be connected to a PC, with
an A to mini B USB cable. OMC-Programmer uses this
connection to read and write configuration to the OMC-045-II
The dimensions of the housing are L x W x H 84 x 92 x 55 mm.
The extending objects are calculated in these dimensions. These
are the SD card, X2 mini USB connector and the fuse holder.
Also the DIN rail connector is not calculated in the dimensions.
The needed dimensions to connect all the connectors when the OMC-045-II is connected in the DIN rail
are L x W x H 120 x 92 x 55. This is because on the back of the OMC-045-II, there are 2 antenna
connectors. On the top there is no extra space needed, because if connected in a DIN rail the front is
open and accessible.
Depending if an antenna cable is used, there is more or less space required on the backside of the OMC-
045-II.
Color Connector Type Network Frequency
Gold SMA GPS
Silver/Grey FME GSM/GPRS 900 / 1800 Mhz
The fuse holder makes it simple to replace a burnt fuse.
Through the LED D10, the status of the OMC-045-II can be seen through the blinking of the LED. The
status can be recognized without connecting the PC. In chapter 8.10 the function of the LED is explained.

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1.2 Versions
The OMC-045-II is available as standard unit for DIN rail mounting, or enclosed in a box. The following
versions are available
type description remarks
OMC-045-II-DIN Version for EN-55022 rail mounting Standard
OMC-045-II-Rain Version enclosed in IP-65 box with 3.6V
Lithium battery Fits in OMC-210 rain gauge
OMC-045-II-Lithium Version enclosed in IP65 box 210x55x75mm,
with 14.4V Lithium battery pack enclosed Not rechargeable
OMC-045-II-Shoebox Version enclosed in an IP65 polyester box for
outdoor use, with enclosed rechargeable
VRLA battery 12V/7Ah
The electronics for all these versions is the same. This manual applies to all versions. Only
electromechanical [aspects] vary, as well as hardware settings.
1.2.1 What’s in the box?
An OMC-045-II datalogger.
USB A-mini B cable 3 m
See Chapter 6, for more information.
1.2.2 OMC-045-II-DIN
Always mount in a dry environment (RH<90%)
1.2.3 OMC-045-II-Rain
A small bag of silica gel is present, do not remove.
Close the box with the 4 screws carefully, so no moisture comes inside.
1.2.4 OMC-045-II-Lithium
A small bag of silica gel is present, do not remove.
Close the box with the 4 screws carefully, so no moisture comes inside
1.2.5 OMC-045-II-Shoebox
No need to open the box.
A small bag of silica gel is present, do not remove.
Close the box with the 4 screws carefully, so no moisture comes inside

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1.3 Type serial plate/sticker
Example:
OMC-045-II-subtype
Serie Nr 045XXXXXX
Observator Instruments
Rietdekkerstraat 6
2980 AB Ridderkerk
Netherlands
www.observator.com
PoHS Compliant

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2Starting with the OMC-045-II
2.1 Handling precautions
No user-serviceable parts inside.
For connecting the connections on the OMC-045-II datalogger, a screwdriver type 0.4 x 2.5 is needed.
Other types, then this screwdriver, damage the connectors. Damaged connectors are less reliable.
All cables should be connected using cable shoes.
2.2 Qualification of the engineer
Installation
When connecting the sensors, check the voltages and interfaces of the datalogger and the sensor. Not all
sensors are protected against faulty wiring. The datalogger could also be damaged if electrical
specifications are exceeded. For example draw to many current or deliver a high output voltage.
Warning ESD: The OMC-045-II must be handled with care and never exposed to ESD discharges. When
installing a sensor or other wiring, make sure there is no power on both devices. ESD discharges could
cause invisible damage, which endangers long term stability and proper operation. For more information
see chapter 3.2
2.3 Preparation
The wireless data functions will only work when an activated SIM with a valid subscription is placed in the
OMC-045-II. In OMC-Programmer the configuration and network settings must also mach those supplied
by the provider. The pin code of the SIM card must be removed, before insertion in the data logger. To
prevent problems with the SIM card it can be inserted in a mobile phone of GSM data modem. In a Mobile
phone or GSM modem the GPRS, SMS and GSM data functionality can be tested.
For placement of SD card, Read the procedure in 7.6.2 .
The SD card is not Windows compatible formatted. Prior of insertion of a new SD card it must be
specially formatted in Obsermet format. All the sectors on the Card must be filled with “0x00”. In some
application this is called a zero fill. For more information read chapter 7.6.2 .
The included SD card is already formatted!
Prior to connecting the data logger to a PC OMC-Programmer must be successfully installed. The setup
also installs a driver for the USB virtual comport. If this driver is not present when a OMC-045-II is
connected to a PC, conflicts may occur.
Check for the latest version of OMC-programmer the support page of www.observator.com (Meteo &
Hydro).

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2.4 Power on for the first time
The OMC-045-II is factory programmed with the necessary system information. This information is visible
in OMC-Programmer. The OMC-045-II is ready to use out of the box if the following is checked.:
SIM card is compatible
SD card is formatted in Observator format (the included SD-card is)
In case sensors are already connected, the wiring has to be checked. Please check the Appendix for the
information of the sensor. With a serial sensor, it is assumed that they are configured according a certain
profile.
Configurations Sensor
Wiring
Maximal and minimum Voltage
Maximal absorbed top and continue power
Warning: The switched power supply for the sensors is equal to the OMC-045-II’s own power supply.
Take note the sensor has to be compatible with the power supplied by the OMC-045-II. If the sensor is
not compatible, it has to be powered by an external source.
Warning: In case the sensor is powered external and not by the OMC-045-II, the ground of the external
power source and the ground of the OMC-045 have to be connected.
2.5 Connect to a PC
OS compatibility: The OMC-045 can connect to any PC with USB 1.2 or USB 2.0 running on Microsoft
Windows 2000 & Windows XP
Windows should recognize now the FTDI USB interface, and Windows will create a “USB Serial Port” with
a COM number. This new port must be set during installation / configuration of OMC-Programmer
The OMC-045-II will synchronize the following parameters while connected to the pc, so check them on
your pc before connecting the OMC-045-II:
Date
Time
Time zone
Warning: while OMC-Programmer transfers the configuration to the OMC-045-II, and while the
configuration is transferred to Flash Rom, the power supply must NOT be interrupted.
Warning: You have to be sure the PC and the OMC-045-II don’t have a power difference on the ground
before the OMC-045-II is connected to a PC through the USB connector.. If this is the case, this has first
to be solved before connecting and using the USB connector. These power differences can damage the
OMC-045-II.

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2.6 Connections (general)
GPS antenna
GPRS antenna
3.6V battery connector
FUSE
X1 USB mini-B connector.
SIM card holder
SD card holder
X2
X3
X4
X2 Connector Layout: power inputs, power outputs, and display
terminal name Description
X2.1 GND
X2.2 VIN Power supply input for 10-30V
(not used for OMC-045-II-regen)
X2.3 GND
X2.4 VOUT1+
X2.5 GND
X2.6 VOUT1+
Switched power supply output for
sensors (output 1)
Terminals X2.4 and X2.6 are internally
interconnected
X2.7 GND
X2.8 VOUT2+
X2.9 GND
X2.10 VOUT2+
Switched power supply output for
sensors (output 2)
Terminals X2.8 and X2.10 are internally
interconnected
X2.11 GND
X2.12 LEDOUT Connection for external red LED. LED
function is identical to the LED on the
top of the OMC-045-II
X2.13 GND
X2.14 VOUTCONT
X2.15 TXDIS Data logger Display
X2.16 RXDIS
Reserved for connections of an external
display
Data logger Display
Warning: The voltage on VOUT1, VOUT2, and VOUTCONT is (almost) equal to the power supply
voltage. Take care that this voltage is compatible to the connected sensors

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X3 Connector Layout: digital inputs and communication ports
terminal name Description
X3.1 GND
X3.2 DIN1 Status input for connection of a passive
switch
X3.3 GND
X3.4 DIN2 Rain gauge input; Pulse input for
connection of passive switch sensors
X3.5 GND
X3.6 TX1 Data logger Sensor
X3.7 RX1
RS232 PORT 1
Data logger Sensor
X3.8 GND
X3.9 TX2 Data logger Sensor
X3.10 RX2
RS232 PORT 2
Data logger Sensor
X3.11 GND
X3.12 TX3 Data logger Sensor
X3.13 RX3
RS232 PORT 3
Data logger Sensor
X3.14 GND
X3.15 TX4 / A Tx Data logger Sensor
X3.16 RX4 / B
RS232 PORT 4 or RS422/RS485
Software-selected in the configuration Rx Data logger Sensor
X4 Connector Layout: analogue inputs and alarm outputs
terminal name Description
X4.1 GND
X4.2 AI1 4-20 mA input channel A1
X4.3 GND
X4.4 AI2 4-20 mA input channel A2
X4.5 GND
X4.6 AI3 4-20 mA input channel A3
X4.7 GND
X4.8 AI4 4-20 mA input channel A4
X4.9 GND
X4.10 AI5 Max 2,5 Volt in
X4.11 VREF
Potentiometer input channel A5
2,5 Volt out
X4.12 GND
X4.13 AI6 0-10V input channel A6
X4.14 DOUT1
X4.15 DOUT2
X4.16 GND
Alarm outputs DOUT1 and DOUT 2.
These are open drain outputs.
Warning: The alarm outputs are open drain output, which means that they are internally connected to
GND (through a FET); an indicating device should be connected between DOUT1 or DOUT 2 and an
external supply voltage of max 20V

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3Safety
3.1 Power supply
The OMC-045-II is protected against reversed polarity of the power. For the 9 – 24 volt connection there
is an easy accessible fuse. When the fuse melts it needs to be replaced with a “5A T 230 V 5 X 20” type.
If the OMC-045-II is power with 3.6 Volt, then it is secured by a SMD fuse. If the SMD fuse is defect, it
has to be replaced by the service department of Observator Instruments.
3.2 ESD
Warning: The OMC-045-II is sensitive to ESD. This discharge has to be avoided by working ESD safe
and in an ESD save environment.
ESD stands for Electro Static Discharge.
Everybody knows the static discharge that you feel when you step out of a car, brushing your hair and the
sparking sound when you take of a sweater. Also lightning is an electro static discharge. For people is
ESD harmless (except for lightning). It can charge up to 40.000 Volt and discharge in a few nanoseconds,
but still then it is harmless for humans. However for some electro components and prints, this is different.
These components are sensitive to discharges. A discharge of 10 Volt can already damage a component!
Consequences
Research proves that ESD is a costly problem in companies that work with electro technical components
and prints. The consequences for a company are:
Higher costs by failure and/or damage
Not reliable products
Dissatisfied customers, bad reputation and market loss
Higher service costs (repair / replacement)
More disturbance
Also the electro static discharge (spark), can have the following consequence:
Fire
Explosions
Electromagnetic interference (EMI)
Heat
Light
Sound waves
Attracting dust particles
Like lightning is for a tree, ESD are for IC’s (Integrated Circuits / Chips). Inside the IC the ESD makes a
little explosion which can cause short-circuit and/or the disconnecting of a line. Because components get
smaller and smaller, the lines also get smaller inside the IC’s. The sensitivity of these chips only
increases, the smaller they become. Damaged IC’s doesn’t have to be defective right away, but as longer
the product is in service, the bigger the damage can get without seeing it. We call this a “Pregnant IC”.
The damage occurs not by the supplier, but by the customer, when the product is used in the field.

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Transport and Storage
The following conditions apply for storing and transporting the OMC-045-II
Storage:
Humidity < 95% (not condensing)
Temp 10 – 30 °C
Transport:
Humidity < 95% (not condensing)
Temp 10 – 30 °C
The OMC-045-II is delivered in a protecting box. It has to be kept in the box until it gets placed. Storage
and transport is only carried out, when the OMC-045-II is in the protecting box. When the OMC-045-II is
build in a system cabinet, the humidity values still have to be completed

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4Mounting and installation
4.1 What is in the box
OMC-045-II
Getting started manual
CD with OMC-Programmer + OMC-Data online
USB A to Mini B cable
SD card 2GB
4.2 Vibrations
The OMC-045-II may not be exposed to vibrations. Long term vibrations can cause the SD card to come
lose, or cause bad connection. The SD card is essential for the working of the OMC-045-II so this can
cause unexpected behavior.
4.3 Connectors
Use for all connections the correct cable shoes, depending on the cable diameter, you have to use the
white or blue shoes for the connectors. For tightening the shoe, proper pliers have to be used. The cable
shoe has to be tightened around all angles, only pushing the shoe flat isn’t reliable. Use for tightening the
screws, only a 0.4 X 2.5 mm screwdriver. Larger or smaller can damage the screws.
4.4 DIN Rail
Assemble the OMC-045-II on a DIN rail. Make sure it is placed in a logical place in the cabin, so the cable
can be kept as short as possible.
4.5 Cabinet
Use a suitable cabinet for the location where the OMC-045-II is going to be used. The air humidity may
not be above 95% and the forming of condense in the system cabinet is forbidden. If this does form,
action has to be taken, to avoid repeating the problem. A small bag of silica gel can help, but keep track
of the consumption of the silica gel.

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4.6 Example System Cabinet
Drawing example of how the OMC-045-II system can be placed in a cabinet.

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5To put in use
When the OMC-045-II is powered, control the next things:
Power and polarity
If the power supply can deliver the maximum power
Are the sensors connected, like the associated drawing
Are the sensors correct configured /calibrated
Power to the sensors and polarity
Is the SD correctly formatted and is it correctly inserted in the OMC-045-II
Is the PIN code disabled on the SIM card
Is the SIM card tested on SMS / GPRS / GSM-Data in a mobile phone
Is the SIM card correctly inserted in the OMC-045-II
To safely test the OMC-045-II use (if available) an adjustable power supply on which you can limit the
maximum supplied current.
If everything above is checked, you can connect the power supply. Keep a close eye on the voltage and
current usage. If the current is higher than expected, disconnect the power supply then check where the
source of the current leak is. If the Voltage goes down, this means the maximum current is reached. This
is a sign of an overload. Disconnect the power supply and solve the overload problem first, before
reconnecting. Disconnect all sensors and reconnect one by one to find the problem.
Configure the OMC-045-II with the OMC-Programmer. You can read how to configure the OMC-045-II by
looking in the help files (via [F1]). An USB connection between the PC and de OMC-045-II is needed for
these instructions
When configuring the OMC-045-II the power consumption can change. Sensors won’t be powered until
this is configured (if they are powered via the OMC-045-II).

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6Controlling and usage of the data logger
The “data logger’ is controlled / configured by OMC-Programmer. Through this program, you can control
the OMC-045-II if it is working and read the actual values of the sensors. You need an USB connection
between the OMC-045-II and the PC for this.
You can perform the following tasks:
Configure
Updating Firmware
Check the GSM signal strength
Check the GPS location
Check the actual values
Communicating with the serial port, if necessary
Look at what the OMC-045-II is doing
Help with using OMC-programmer, can be found in the Manual and in the help files (via function key
[F1]).
6.1 The data logger
The OMC-045-II uses a scheduler to plan all his tasks and run the
tasks in a periodical time. These tasks are controlled by the task
manager. The task manager keeps track of every status of all tasks.
The task manager knows when a certain task has to be executed, by
means of a task timer. Furthermore the task manager knows how
many times a task preformed a timeout and which “power switch” they
use.
6.1.1 Power Delay
As soon as the task timer of an input task gets in its power delay
time, the used “power switch” of that input task is activated. A
power delay is a period between the activation of a sensor and
when the data is trustworthy enough to be read. This can be
warming up time for analog sensor. There is a power delay for
every switched Voltage output.

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6.2 Working of the scheduler
6.2.1 Synchronization
The scheduler plans the tasks of the OMC-045-II,
with use of a real time clock. All tasks are
synchronized with this clock. If a task has to be
preformed every 10 seconds, the task will
preformed on 00, 10, 20, 40, 50 s of the clock.
Sync method Interval Sync on divide
number off
1 < 1 sec N.A.
2 <= 60 sec 60 sec
3 > 1 min < 1 hour 60 min
4 > 1 hour 24 hour
6.2.2 Alarm
The system is controlled if it is in Alarm mode or not. If an Alarm setting is reached, the interval switches
from “Normal interval” to “Alarm interval”. When it switches to Alarm interval, all tasks are synchronized
with the new interval.
You can configure an alarm on all measured and calculated data.