Nokeval Cell-Sky-Link-RS485-3G Manual de usuario
ID9354 V4 5.7.2018
Firmware versions 1.3.0-1.3.0
Cell-Sky-Link-RS485-3G
Manual
2
Contents
Introduction ....................................................................................................................................................3
Installation ......................................................................................................................................................5
Configuring the device ....................................................................................................................................8
Usage ............................................................................................................................................................. 17
Maintenance .................................................................................................................................................. 19
Troubleshooting ............................................................................................................................................ 20
Specifications ................................................................................................................................................ 21
Warnings ........................................................................................................................................................ 23
Trademarks ................................................................................................................................................... 23
Manufacturer ................................................................................................................................................. 23
3
Introduction
Cell-Sky-Link-RS485-3G is a base station for 2.4 GHz and 433.92MHz Nokeval-transmitters and part of
Nokeval Sky and Ovazone product families. It receives and buffers radio packets to its non-volatile
memory and transmits them over GSM mobile data networks to Ovaport network service, thus enabling
reliable remote data acquisition from the field straight to the Ovaport servers located in a data center.
Serial interface
The base station can be connected to standard Modbus RTU transmitters and to Nokeval devices with
SCL protocol using the integrated RS485 bus. The base station’s reliability is increased by the backup
batteries, which enable uninterrupted data acquisition also during external power interruptions.
Sky radio
Nokeval’s third generation Sky radio devices use the Semtech LoRa modulation technique on the 433
MHz ISM band that allows unforeseen wireless range for battery powered transmitters. The protocol
used is defined by Nokeval, called Sky, which means that these devices are not compatible with the
LoRaWAN infrastructure.
The modulation has some parameters to define its operation. With the “maximal” settings, a very long
range can be reached, but at the expense of high battery and radio band consumption. One radio
transmission can last approx. 2 seconds (compared to 20 ms of the Nokeval MTR series). This means
that the number of transmitters within the range must be limited in order to avoid collisions and to
allow radio time for each. It is not practical to use a short interval between transmissions; 10 to 30
minutes is the recommended interval range.
When the maximal range is not necessary, the parameters should be adjusted for lower battery and
band consumption. All the devices within one network must share the parameters, because the
receiver can only listen with one set of parameters at a time. Consequently, the parameters must be
selected according to the most distant device. It is also possible to adjust the transmission power. The
devices that are closer to the receiver can use a lower power setting.
Before using these 433 MHz radio devices, make sure it is legal in your country.
Ovanet radio
Ovanet is Nokeval’s second generation radio network, which uses Wirepas Pino technology and
Nokeval’s own additions. The network uses 2.4-2.48 GHz band, which is available all over the world. The
product names basically begin with the Ovazone prefix.
Every device in the network, also battery powered ones, will function as a repeater by assisting devices
located far away from the gateway, effectively forming a mesh network.
The network has node devices producing measurement data, and one or more gateways. The gateway
connects the network to other systems. Examples of the gateway devices are Ovazone-Wave-Link and
Ovazone-Cell-Link. They are used to deliver the data of the radio network to the Ovaport service.
Each device, including nodes and gateways, must be set with the same Ovanet network. The Ovanet
network number must be chosen between 1-16777214. It should be generated with a random number
generator to minimize the probability of accidentally choosing the same network number as in another
network located nearby. By default, the devices are set to the network number 6829663, which can be
used if there are no other Ovanet or Wirepas Pino networks within a couple hundred meters range. If
4
two networks have the same number by accident, the node devices may connect to a wrong network
and the data is not delivered to the desired gateway.
Each device has a unique Ovanet address. This is set at the factory and there is no need to change it.
The address is visible in the back label of the device.
The devices automatically change their radio frequency seeking suitable frequencies in the crowded 2.4
GHz band. However, at power-up the devices need to find other devices in the network, for which a
common radio frequency is needed. All the devices of the network need to be set to the same radio
channel between 1-28. Usually the default channel 1 is ok.
There is no need to configure any other radio network settings. The network searches automatically for
the best connections and updates them if needed.
The open space range between the nodes is at most about 200 meters and indoor range is some tens of
meters depending on the construction materials. Placing the devices near a metal surface will decrease
the range.
5
Installation
Wall holder
Install the base station to a wall or some other suitable surface with the separate wall holder. See the
following dimensional drawing for the wall holder’s mounting hole distances. Use fastening accessories
suitable for the wall material, like plugs and screws. The screws need to have a countersunk head.
Installation location
Choose an installation location that it is central in relation to the radio transmitters.
The base station must be installed vertically. The base station is splash proof, but the location must be
chosen so that the unit will not be exposed to water or hot steam. Please note that the AC socket and
the power supply are not splash proof.
The location must have GSM/GPRS/3G network coverage. This can be verified before the final
installation steps by powering on the base station and checking the signal strength indicator LEDs.
Installation location must have one free AC socket for the power supply.
Connections
Every Cell-Sky-Link-RS485-3G base station model has one or two connectors in the lower part of the
enclosure. Every model has an M12 type female connector (receptacle) and a detachable male
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connector (plug). The connector has four pins and it is a combined power supply and serial connector.
The table below describes the function of each pin.
Pin
Symbol
Description
1
+VDC
Power supply positive pin
,
1
8…28 VDC
2 D0 RS-485 bus D0 pin
3
GND
Power supply negative pin
, RS
-
485
bus ground
4
D1
RS
-
485
-
bus
D1
pin
The diagram below presents the connector pinout looking towards the base station’s female
connector. The same pinout is valid for an opened male connector looking towards the terminal
screws. Please note the polarizator location in the diagram between pins 1 and 2. The detachable M12
connector supplied with the base station has numbering inside the connector next to the screw
terminals.
The picture below shows the male connector pinout looking into the connector.
Polarizator
7
This example picture illustrates how the base station can be connected to an RMD680 / RMD681
transmitter by sharing one 24 VDC power supply.
RS-485 bus information
RS-485 is a serial bus type commonly used in the industry. It is based on two data lines D0 and D1,
which are connected in parallel with all the devices connected to RS-485 bus and D0 and D1 pins. To
even up the electric potential between different devices, a third wire is also needed. In the above
example picture the blue ground wire evens the potential differences between the devices. Branches in
the bus should be avoided, in other words the bus cabling should circulate through all the devices
without branches. The maximum recommended length of the bus is 1 km. The cable should be twisted
pair and the wire diameter should be at least 0.5 mm.
To ensure EMC compliance the RS-485 bus cable should no more than 30 meters long.
The bus is bidirectional. Only one device at a time can send data, during which other devices listen.
Only one device connected to the bus is set as master, in other words as a chairman, which starts all
conversations on the bus. Other devices are slaves and they only answer to queries of the master. Each
device connected to the bus has its unique bus address, which the master device uses to direct its
commands to a specific device.
The base station functions as an RS-485 bus-master and queries the measurement data from other
devices on the bus. In a typical application, such as the one presented in the diagram above, the base
station regularly queries the RMD680 / RMD681 transmitter’s measurement data and sends it to the
Ovaport server.
Radio receiver antenna connector
The base station top part has the radio receiver’s female BNC connector. The base station is supplied
with a suitable antenna. Attach the antenna to the connector to complete the installation.
The base
station
24 VDC
PSU
8
Configuring the device
There is usually no need to configure the device since most of the settings are already at their best
defaults. However, if you want to see what kind of settings there are or edit settings, use MekuWin
program and DCS772 (USB-POL converter). You can download MekuWin from Nokeval’s web site
www.nokeval.com for free.
Connection settings
Communication settings for configuration:
baud rate 9600
protocol SCL
address 0
Programming connector
The device has a 3PIN POL programming connector under the backup battery compartment lid.
Remove the battery compartment lid to access the programming connector. Use POL-3PIN adaptor to
connect the DCS772 to the device. The 3PIN POL programming connector can be connected in both
ways.
Conf menu
The configuration menu settings are explained in the following chapters.
Mon menu
The monitor menu settings are mainly for manufacturer use, and most of them are not explained in this
manual. Support for purpose of these settings is available upon request from [email protected]
Cal menu
The calibration menu settings are only for manufacturer use, and they are not explained in this manual.
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Menu chart
10
External battery
Config External battery
If the external power supply is a battery, this can save power by connecting to the server only
from time to time.
Config Buffering Offline period
If external battery function is on. If offline period reaches this value, connect to the server to
empty the buffer.
Config Buffering Offline buffering
If external battery function is on. If the buffer reaches this value, connect to the server to empty
the buffer.
Ovanet settings
Config Ovanet Enable fault LED
If Ovanet is not used and there is no Ovanet radio module in slot 2, take selection off. It disables
the front panel error message LED.
Config Ovanet Network address
The network address that must be the same for all devices on the same network. 1…16777214.
Please note that all addresses are not valid. Addresses that contain 8-bit sequence 10101010 or
01010101 are not valid. If the display shows zero, it means that the value could not be read from
the radio module.
Config Ovanet Channel
The network channel that must also be the same for all devices on the same network. 1…28. If
the display shows zero, it means that the value could not be read from the radio module.
Config Ovanet Auth key
If encryption is used, enter an authentication key text that is the same on all network devices.
Otherwise, leave blank.
Config Ovanet Cipher key
If encryption is used, enter a cipher key text that is the same on all network devices. Otherwise,
leave blank.
Config Ovanet Diag interval
Advanced mode for the network analysis. Normal state is Off.
MTR & Nokeval Sky settings
Config Module 1
Selects whether Nokeval Sky or MTR is in use at Module slot 1.
Tabla de contenidos
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