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  • Controlling a Barrier with an Alarm System on the Basis of NetPing (transferring «dry contacts» via Ethernet TCP/IP)
Tutorial
6/2/2016

Controlling a Barrier with an Alarm System on the Basis of NetPing (transferring «dry contacts» via Ethernet TCP/IP)

Scheme of a control room

Modern technologies are found today in all spheres of life, allowing to automate and simplify different processes for a human. Not the latest role is given them in the sphere of access. The things that needed to be performed manually before can be trusted to the remote control systems today. Thanks to this, an execution time is shortened, and a work for a human is simplified in general.

NetPing devices, which are designed to monitor a microclimate status of server rooms and other objects, provide security functions and rapid alerting of corresponding personnel, additionally help to implement a system of remote controlling objects with a feedback. This solution based on NetPing devices contributes to significant reducing of financial expenses compared to professional systems, deployment time, and get simple management and high reliability of work.

In this article, we will examine an example of implementing a remote control for a barrier (on the basis of open/close buttons) with a LED light, which must react at a position of a barrier.

Requirements for Implementation a Remote Control for a Barrier with an Alarm System

To implement a represented solution, the next equipment will be required:

  • NetPing IO v2 device - 1 pc.;
  • UniPing v3 device - 1 pc.;
  • unlatched opening-closing buttons - 2 pcs.;
  • a position sensor for a barrier (reed) - 1 pc.;
  • a LED light- 1 pc.;
  • a barrier - 1 pc.;
  • a common data network

Logic of a System Operation

To activate the action of opening/closing a barrier, unlatched opening/closing buttons are used, which are installed in a controller's control room. The buttons are connected to O1 and IO2 lines of a NetPing IO v2 sensor. In addition, a LED light is connected to an IO3 line of a NetPing IO v2 device. This indication will notify a controller about a physical position of a barrier. The barrier itself and a barrier position sensor are connected to a UniPing v3 device to the built-in relay «PWR2» and IO2 line accordingly. The devices NetPing IO v2 and UniPing v3 are connected

When pushing the button «Open a barrier», which is installed in a control room, a logic level of an IO1 line is changed to an opposite one. A NetPing IO v2 device will send SNMP SET command to switch on a built-in relay «PWR2» of a UniPing v3 device, and a barrier will open. After opening a barrier a position sensor of a barrier initiates changing a logic level of an IO2 line of a UniPing v3 device. As a result, a UniPing v3 device will send a command SNMP SET to change a logic level of an IO3 line of a NetPing IO v2 device, to which a LED light is connected. A LED light in a control room will be switched on.

When pushing the button «Close a barrier», which is installed in a control room, a logic level of an IO2 line will be changed to an opposite one. A NetPing IO v2 device will send a command SNMP SET to switch off a built-in relay «PWR2» of a UniPing v3  device, and a barrier will close. After closing a barrier, a position sensor of a barrier will initiate changing of a logic level of an IO2 line of a UniPing v3 device again. As a result, a UniPing v3 device will send a command SNMP SET to change a logic level of an IO3 line of a NetPing IO v2 device, to which a LED light is connected. A LED light in a control room will be switched off.

Connecting Buttons, LED Light and a Position Sensor of a Barrier

1. Unlatched opening-closing buttons need to be connected to IO1 and IO2 lines of a NetPing IO v2 device. A connection order of wires does not matter.

Button FlexTerminal of a NetPing IO v2 Device
First WireIO1, IO2
Second Wire

GND

2. It is necessary to connect a LED light to an IO3 line of a NetPing IO v2 device. A connection order of wires does not matter.

Button FlexTerminal of NetPing IO v2 Device
First WireIO3
Second Wire

GND

3. It is necessary to connect a position sensor of a barrier to an IO2 line of a UniPing v3 device. A connection order of wires does not matter.

Button FlexTerminal of UniPing v3 Device
First WireIO2
Second Wire

GND

Configuring NetPing IO v2 and UniPing v3 Devices

In this example, a configuration of NetPing IO v2 and UniPing v3 devices will be examined. Such configuration is required to implement a remote control of a barrier with a LED light. It is supposed that a basic configuration of devices is already done (configuring network parameters for connected to a data network). All necessary information about configuring software and connecting different sensors to devices can be browsed in a corresponding documentation:

The first step of configuring is in connecting to a web-interface of a NetPing IO v2 device. To perform a connection, there is a need to enter an IP address of a device into a browser and get authorized:

Connecting to the web-interface device NetPing

Parameters of a NetPing IO v2 device:

  • IP-address: 192.168.0.100
  • Username: visor
  • Password: ping
  • Community read/write: SWITCH

Parameters of a UniPing v3 device:

  • IP-address: 192.168.0.101
  • Username: visor
  • Password: ping
  • Community read/write: SWITCH

Then go to the page «DISCRETE I/O» of a device web-interface. There is a need to:

  1. configure a memo of necessary IO lines;
  2. switch an operation of IO1 and IO2 lines into the mode «input»;
  3. switch an operation of IO3 line into the mode «output»;
  4. configure encoding of a logic level of IO1, IO2, IO3 lines

Save the settings by clicking the button «Apply changes».

Configuring IO lines

The setting described above is necessary for implementing closing contacts of both buttons when they are pushed and switching on a LED light when opening a barrier. Closing of buttons will fix the lines IO1 and IO2 of a NetPing IO v2 device. An open contact of a button corresponds to a status «logic1», a closed contact of a button corresponds to a status «logic 0». A LED light will be switched on, when an IO3 line is set to the status «logic1» and vice versa.

There is a need to configure a module «SNMP SETTER» and rules of logic, which will activate sending  SNMP SET commands to a UniPing v3 device for NetPing IO v2 to send signals to open/close a barrier when buttons are closed. These parameters are set on the page «LOGIC» of a device web-interface.

Configuring logic rules

Therefore, logic rules, which are shown on the screenshot execute the next actions:

  1. When a logic level of an IO1 line is switched to a status «logic 0» (a contact of a button «Open barrier» is closed), a NetPing IO v2 device will send a command SNMP SET to open a barrier using the module «SNMP SETTER»;
  2. When a logic level of an IO2 line is switched to a status «logic 0» (a contact of a button «Close barrier» is closed), a NetPing IO v2 device will send a command SNMP SET to close a barrier using the module «SNMP SETTER»

Configuring the module «SNMP SETTER» looks the next way:

Configuring SNMP Setter

where:
Address – is an IP-address, where a command SNMP SET will be sent (in this example an IP address of a UniPing v3 device is indicated);
UDP Port – is a port, which is listened by an SNMP agent on a remote device;
OID (.1.3.6...)  is an identifier of a variable, which will be set on a remote device. In this example, an identifier «.1.3.6.1.4.1.25728.5800.3.1.3.2» is shown. it is designed to control a built-in relay 2 («PWR2») of a UniPing v3 device. There is a need to indicate a complete
 OID in a numeric notation starting from «.1.3…». A list of variables is contained in a MIB file of a device in a special format or in a documentation for a device. For convenient browsing of a MIB file in a form of a tree and checking the functions of variables it is possible to use a freely distributed software iReasoning MIB Browser or any similar software;
Сommunity  is an SNMP Community write, configured on a remote device on the page «SETTINGS». In this example, a value «SWITCH» is used;
«On» Value  (type Integer32) – is a value, which will be written into an OID on a remote device when calling the action «Switch On». In this example, when writing the value «1» a relay is switched on and a barrier is opened;
«Off» Value (type Integer32)  is value, which will be written into OID on a remote device when calling the action «Switch Off». In this example, when writing the value «0» a relay is switched off and a barrier is closed)

The second step of configuring is configuring a UniPing v3 device. To understand the entire process of configuring better it is recommended to start from configuring a memo for a relay 2 («PWR2») on the page «RELAY MANAGEMENT» and switch a relay 2 into the mode «Manual Off».

Configuring relays

Afterward, go to the page «DISCRETE INPUT-OUTPUT» of a device web interface and configure a memo, an operation mode «input» and encoding a logic level for an IO2 line.

Configuring IO2 line

The described setting is necessary to determine a position of a barrier (opened/closed). The information about a position is received from a position sensor of a barrier (reed). Thus, when a barrier is closed, a logic level of an IO2 line corresponds to a status «logic.0», and when a barrier is opened, a logic level of an IO2 line corresponds to a status «logic 1».

It is necessary to configure the module «SNMP SETTER» and rules of logic of a UniPing v3 device, which will activate sending SNMP SET commands to a NetPing IO v2 device to enable UniPing v3 to send the signals to switch on/switch off a LED light installed in a control room when opening/closing a barrier. These parameters are set on the page «LOGIC» of a device web interface.

Configuring logic rules for LED light

Therefore, logic rules, indicated on the screenshot, perform the next actions:

  1. When a logic level of an IO2 line switches to a status «logic1», and a barrier is opened, a UniPing v3 device will send a command SNMP SET to switch on a LED light using the module «SNMP SETTER» ;
  2. Когда логический уровень IO2 switches to a status «logic 0», and a barrier is closed, a UniPing v3 device will send a command SNMP SET to switch off a LED light using the module «SNMP SETTER». 

Configuring the module «SNMP SETTER» looks the next way:

Configuring SNMP Setter

where:
Address – is an IP-address, where an SNMP SET command will be sent. in this example, an IP address of a NetPing IO v2 device is indicated;
Port – is a port listened by an SNMP agent on a remote device;
OID (.1.3.6...)  is an identifier of a variable, which will be set on a remote device. In this example, an identifier «.1.3.6.1.4.1.25728.8900.1.1.3.3» is indicated. It is designed to control an IO3 line in the «output» mode of a NetPing IO v2 device. There is a need to indicate a complete OID in a numerical notation, starting from «.1.3…». A list of variables is in MIB file from a device in a specific format or in a documentation of a device. To browse a MIB file conveniently in a form of a tree and check functions of variables, it is possible to use a freely distributed software iReasoning MIB Browser or any other software;
Сommunity  is SNMP Community write, configured on a remote device on the page «SETTINGS». In this example, a value «SWITCH» is used;
«On» Value (type Integer32) – is a value, which will be written into OID on a remote device when calling the action «Switch On». In this example when writing the value «1» an IO3 line of a NetPing IO v2 device is switched to the status «logic 1» and a LED light is switched on;
«Off» Value (type Integer32)  is a value, which will be written into OID on a remote device when calling the action «Switch Off». In this example, when writing the value «0» an IO3 line of a NetPing IO v2 device is switched to the status «logic 0» and a LED light is switched off.

Result

As a result of a simple implementation of remote controlling a barrier with a LED light on the basis of NetPing devices the simplest sheme is represented. This scheme allows to get, deploy and maintain described functionality to even the personnel unqualified in this field.


  • NetPing IO v2

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