System Description and Configuration of sat-nms Deice ...The sat-nms Deice Controller provides an...

© 2020, SatService GmbH www.satnms.com DEICE-APP-2020-02-20 1/7

System Description and Configuration of sat-nms Deice Controller

The sat-nms Deice Controller is characterized by an efficient and energy-saving deicing control

sequence. The module provides interfaces for up to 16 heating elements with opto-coupled in- and

outputs and potential free-relay outputs. It can be mounted as outdoor unit into a cabinet next to the

antenna or as indoor unit. All loop parameters and the temperature slope are software-configurable.

This means, it is possible to adapt the deicing sequence to your needs and optimizing the power

consumption. All heater elements are controlled separately, will be only activated if necessary and will

be switched off immediately if they are not required anymore. With the SatService solution, you will get

full local and remote monitoring & control capability for this controller. The sat-nms MNC module

includes an integrated web-server with an Ethernet interface so that the operator can also monitor and

control the deicing via its web-browser - both locally or remote

whenever it is connected to the same LAN. The M&C module provides

the following interfaces for monitoring & control via external

equipment:

• Serial Remote Control Protocol via RS232

• TCP/IP via the 100-Base-T Ethernet Interface

• SNMP (Simple Network Management Protocol)

• Remote Control Protocol over HTTP get request

The sat-nms Deice Controller is supplied with 24VDC. The

dimensions of the module are 264x165x60mm, it weighs 1.5 kg

and is mounted on a DIN-Rail.

Interfaces

• 48 digital Input

• 16 digital Output

• 8 Interfaces to control hot plates

• 4 analog Inputs for external PT1000 Sensors

• RS232, Ethernet

• 24V DC Power Output

Web Interface - Current State

The following pages explain web-based graphical interface of the sat-nms Deice Controller. The 'State'

page is the main page of the sat-nms Deice-Controller that shows the current state of all in- and

outputs. The page shows all information about the input / output states, temperature readings and

faults. The page is read-only.

Deice Operation

The operation table shows the current state of the operation parameters:

• Mode: The mode state shows the operation state of the deicing controller. The following modes are possible:

o OFF: The deice function is off; all other operation states will be reset to the start parameters

Antenna Deicing Cabinet


o MANUAL: The deicing will start manually by overwriting the deice sensor state. The Heater/Blowers will only start if the ambient sensor states ON, the ambient

temperature is below the threshold, the internal reflector temperature is below the

threshold minus the hysteresis and no alarm exists of the Heater/Blower.

o AUTO: The system operates in auto mode that is the normal operation mode. Snow on the deice sensor will trigger the deice procedure.

• Request Deice: This state shows that a deice cycle is requested and the loop control of the Heater/Blowers is active.

• Active Stages: This state shows, which stage of the Heater/Blowers is active.

o 0 = no stage is active

o 1 = all Heater/Blowers selected are active

o 2 = stage 1 and 2 are active

o 3 = all stages are active

• Temperature slop: During the heating phase, this value shows the temperature slope in the main reflector in °C per min. This value compared with the corresponding threshold is used to select the

number of used stages.

• Summary alarm: This state shows the summary alarm of the deice section.

Deice Sensor State

The Sensor State shows the current state of each sensor involved in the deice procedure:

• Deice Sensor / Remaining Time: The State ON means the sensor is triggered by snow. The remaining time counter

will be started after the sensor falls back to OFF and will

display the time how long the deice cycle will be kept on

after loss of the input trigger.

• Optic Sensor / Panel Temp.: This state will be displayed if snow is inside the reflector and shows the temperature of the panel in the main reflector.

• Ambient Temp. Sensor: This state is ON if the temperature is below the configured temperature sensor value and below the real measured value. Attention! Only if the state is ON and the value is

below the adjusted threshold deicing is possible.

• Reflector Temp. bottom / top: This value is used to control the temperature inside the reflector for the adjusted threshold.

• Sub-Reflector Control Temp.: This state controls the ON/OFF State of the sub-reflector heating.

Deice Heater/Blower State

The Heater/Blower State shows the current state of each Heater/Blower:

• The second column shows the name of the specific Heater/Blower unit to identify the device.

• The third column displays the state ON/OFF

• The fourth column gives information in which stages the Heater/Blower operates. Outputs configured as 'UNUSED' show neither a circuit name

nor an ON/OFF state.


• The fifth and sixth columns show the alarm state of each Heater/Blower unit. Two separate Alarm Inputs are foreseen for each Heater/Blower Unit. Inputs configured as 'UNUSED' show neither an

OK/FLT state.

Rain-blower Operation

The operation table shows the current state of the operation parameters:

• Mode: The mode state shows the operation state of the rain- blower controller. The following modes are possible:

o OFF: The rain-blower function is off; all other operation states will be reset to the start

parameters.

o MANUAL: The rain-blower will start manually by overwriting the rain sensor state. The Heater/Blower will only start if there is no alarm of the Heater/Blower.

o AUTO: The system operates in auto mode that is the normal operation mode. Rain or snow on the deice sensor will trigger the rain-blower procedure.

• Request Rain-Blower: This state shows that a rain-blower cycle is requested and the control of the Heater/Blower is active.

• Summary Alarm: This state shows the summary alarm of the rain-blower section.

Rain Blower Sensor State

The sensor state shows the current state of each sensor which is involved in the rain-blower procedure:

• Rain or Deice Sensor / Remaining Time: The State ON means, the sensor is triggered by snow or rain. The

remaining time counter will start after the sensor falls

back to OFF and will display the time how long the rain-blower cycle will be kept on after loss of the

input trigger.

Rain-blower Heater/Blower State

The Heater/Blower state shows the current state of the feedhorn

blower.

Web Interface - Settings

The page 'Settings' is used

to configure the sat-nms

Deice Controller. It is

possible to change any

parameters in this page.

• 'Operation Mode Deice' and 'Operation Mode

Rainblower' are

'Operation Parameter'.

For each Operation the

following parameters

are possible to change:

OFF, MANUAL, AUTO.


• The 'Loop Parameters' are adjustable values for the heating control.

Web Interface - Setup

The pages accessible through the 'Setup' menu items contain the sat-nms Deice Controller's installation

parameters. Installation parameters are protected by an administrator password, without a successful

login as administrator you may view the configuration settings but you may not change them.

• General Setup: Contains general configuration parameters like communication interface settings, passwords etc.

• Output Circuits: The usage of the output circuits of the sat-nms Deice Controller will be configured on this page like Blower/Heater, Sub Reflector, Feed Horn Blower

• Input Circuits: The usage of the input circuits is configured on this page like alarm contacts of the heater, digital temperature sensors, etc.

• Temperature Sensors: The temperature sensors connected to the sat-nms Deice Controller are configured on this page.

• State All: State of all Inputs and Outputs in the basic format

• Set Outputs: Setting of all Outputs, which are set as normal outputs.

Event Log

The sat-nms Deice Controller provides an internal event log recording all changes at input circuits,

output circuit actuations and temperature limit alarms. Each event is stored with a time stamp read

from the sat-nms Deice Controller's real time clock. The event log is limited to a size of 500 events, the

log works as a circular buffer and recent entries automatically overwrite the elder ones. The event log


resides in the sat-nms Deice Controller's volatile memory; the log always starts empty when the sat-nms

Deice Controller is powered on.

Auto Mode Sequence

When the AUTO mode is selected, the system is controlled by an ambient temperature sensor, a

reflector temperature sensor, optic sensor for snow, 4x PT1000 sensors to measure the real value and

the Rain/Snow Sensor Controller. Is the temperature below the ambient temperature and water is

detected, the sat-nms Deice Controller will trigger the deice procedure.

For example, snow is detected by the snow sensor, sub reflector heater and stage 1 with all

Heater/Blowers selected turning on in 1-second intervals. The temperature slope shows the user during

the heating phase the temperature slope in the main reflector in °C per min. This value compared with

the corresponding threshold is used to select the number of used stages.

The delay time will start after the snow sensor goes back to OFF. If the optic sensor detects no snow

during the delay time the heaters are switched off prematurely.


The next figure shows the control sequence of the air chamber temperature in the reflector.

Output Circuits Connectors

CON 4 and CON 5 refer to

the photo-MOS outputs.

CON 10, 11, 12, 13, 22, 23,

24 and CON 25 are the 24V

DC power relay outputs of

the sat-nms Deice

Controller.

This figure shows how you

connect the

Blower/Heaters to the sat-

nms Deice Controller. You

have the possibility to

control one Blower/Heater

(blue line) or more than

one (green line) with one

output. K1, K2, and K3 are

solid states with 24V DC

input and 230V AC output.

In parallel to the SNMP and HTTP interface the sat-nms Deice

Controller provides at CON 16, for example, status and alarm contacts


via general purpose relay outputs. This can be used for additional monitoring purposes.

Input Circuits Connectors

The sat-nms Deice Controller has 48 inputs (CON6, 7, 8,

9, 18, 19, 20, 21, 10, 11, 12, 13, 22, 23, 24 and CON 25).

Each input may be configured as a simple state

monitor, signaling its state as ON/OFF, or as alarm

input signaling its state as OK/FLT. The following figure

gives an overview of the various ports.

SatService

Gesellschaft für Kommunikationssystem mbH

Hardstrasse 9

D-78256 Steisslingen

Germany

Phone +49 7738 99791 10

Fax +49 7738 99791 99

E-Mail: [email protected]

Internet: www.satnms.com

www.satservicegmbh.de

System Description and Configuration of sat-nms Deice ...The sat-nms Deice Controller provides an...

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