The information contained in this document is the property of MULTITEL INC.
Except as specifically authorized in writing by MULTITEL INC., the holder of this
document shall:
1. Keep all information contained herein confidential and shall protect same in whole
or in part from disclosure and dissemination to all third parties and;
2. Use the same for operating and maintenance purposes only.
2003 MULTITEL Inc.
Printed in Canada , 2003-06
iS3
Version 1.4
User’s Guide
PROPRIETARY INFORMATION
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Table of Contents
TABLE OF CONTENTS..................................................................................................................... 2
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About…
Certification Information
RESIDENTIAL EQUIPMENT
CLASS B DIGITAL DEVICE
INFORMATION TO USER
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that
may cause undesired operation.
This equipment has been tested and found to comply with the limits for Class B
Digital Device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures.
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
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Limited Warranty Policy on
Multitel Hardware
MULTITEL represents, warrants and covenants to Buyer that, for a period of twenty-four
months after shipping date of such Product, the Product when installed and used in accordance
with specifications described in user manuals, technical materials and related writings
published by MULTITEL with respect to such Product, shall be free from defects in materials
and workmanship.
During the warranty period, MULTITEL or its designated service representative
shall repair, or at its option, replace any Product that is confirmed to be defective
by MULTITEL. Product repaired under warranty shall be warranted for six (6)
months or for the non-expired portion of the warranty applying to the Product,
whichever is longer. Buyer shall promptly notify MULTITEL of any Product’s
defect during the warranty period.
This warranty shall be null and void if the Product has been damaged by accident,
misuse or misapplication or has been modified or altered by Buyer without
MULTITEL’s express written acceptance of Buyer’s modifications for warranty
purposes.
Upgrades, new releases and product modifications requested by the customer are
not covered by this guarantee.
Administrative charges will be billed for any unit returned on which no defect is found.
Notwithstanding the foregoing, MULTITEL’s liability for breach of any warranty
or covenant set forth in this document shall be limited as follows:
1. The duty to indemnify provided above may be asserted only by MULTITEL;
2. MULTITEL’s sole obligations arising due to a breach of the Product Performance
Warranty provided above shall be to:
cause the Product to perform substantially in accordance with Product specifications described
in the user manuals, technical materials and related writings published by
MULTITEL with respect to the Product, or if that is not commercially practical, then
reimburse the Product price charged to Buyer, plus the cost of shipment of such Product paid
by Buyer, if any;
3. THE LIABILITY OF MULTITEL FOR DAMAGES UNDER THIS DOCUMENT,
OTHER THAN FOR PERSONAL INJURY, RELATING TO ANY ALLEGEDLY
EFFECTIVE PRODUCT, SHALL, UNDER ANY LEGAL OR EQUITABLE
THEORY, BE LIMITED TO THE ACTUAL PRICE PAID BY BUYER FOR SUCH
PRODUCT AND SHALL IN NO EVENT INCLUDE INCIDENTAL,
CONSEQUENTIAL OR SPECIAL DAMAGES OF ANY KIND (EVEN IF
MULTITEL IS NOTIFIED OF THE POSSIBILITY OF SUCH DAMAGES.
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4. THERE ARE NO WARRANTIES OTHER THAN THOSE WHICH APPEAR ON
THIS DOCUMENT AND IMPLIED WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE OR OF MERCHANTABILITY ARE HEREBY
DISCLAIMED.
NOTE:
Some states or provinces do not allow the exclusion or limitation of
consequential damages, so the above limitation or exclusion may not apply to
you.
General Information
Purpose
This document is intended to present the functions, applications and basic concepts of
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the iS
. An Installation manual is also provided with this product.
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Application
The iS3 is a very versatile monitoring and control unit tailored for space-sensitive
applications such as cabinets.
• Up to 28 real channels without expansion board and 44 with expansion board can be
configured to detect harmful conditions, take measurements, and control local
equipment;
• An almost unlimited number of derived channels can also be configured to process
measurements or create complex alarm messages;
• Data logging files record information about your site, helping to trend and analyze
site behavior;
• An easy-to-use Web browser-based interface that makes getting information a breeze.
• Support of SNMP with full HP OpenView integration kit.
• Pass-through function, offering an embedded 2 port terminal server.
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File System
------------
Configuration files
Firmware files
------------
Data Logging files
Data Acquisition &
Channel Engine Process
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I/O Interfaces
System
Channels
Real & Derived
Channels
Interface
Alamrs &
Messages
FTPHTTPSMTPSNMP
TCPUDP
IP
PPP
Serial & modemSerial & modem
Ethernet
Figure 1 - iS3 functional overview
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Since the iS
is targeted for telecommunication applications, its internal power supply
will accept the standard –48 VDC or +24 VDC, depending on the model.
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CHAPTER 1
Introducing the iS3
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The iS3 has all the traditional features of an RMU (remote monitoring unit), despite
its small size and low power consumption. In fact, the iS
3
possesses more features
than most RMU, including extended connectivity provided by a standard Ethernet
port and an optional internal high-speed modem.
Data acquisition is done using simple binary or more complex analog inputs. Using
the latter type, measurement of voltage, current, temperature, humidity, and other
parameters is done using a 12-bit analog to digital converter.
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The iS
offers an embedded Web server, providing a very easy means to view realtime data, download data logging files, calibrate the unit data acquisition channels,
etc.
The iS
3
also comes with an SNMP agent, SMTP support to send e-mails, an FTP
server to easily upload and download configuration and data logging files. A passthrough function has been added in order to provide terminal server capability. This
means you can connect legacy devices to your IP network through the iS
Users and their access to the iS
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can also be managed through the very unit. You can
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.
define a high number of users, each having one of 3 possible user access levels,
allowing the management of users and the type of action they can perform while
using the iS
3
.
Using the LAMBDA (Logical And Mathematical Built-in Data Analyzer) engine, the
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provides real time data processing. A set of derived channels, through which you
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configure unit behavior, allows you to build powerful custom applications that
further process and analyze acquired data.
Getting Started
The first and most important step once the equipment has been installed, plugged
and all proper connections have been made is to establish direct communication
between your PC and the iS
these units: the Ethernet and the PPP (point to point protocol).
Once the iS
just turning the unit on. The unit is delivered with a default IP address which does not
guarantee immediate communication between the unit and your PC because it is not
necessarily compatible with your network. Therefore, to have these two units
communicating through the same language, you will have to carry out, at least and
depending on your operating system, one of the following two procedures.
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. There are two main protocols to communicate with
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is installed, setting it ready to operate for the first time takes more than
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PPP Connection Procedure (Windows ’98)
To establish communication with the iS3 using Windows ’98:
5. Connect a DB9 serial cable from the RS-232 CRAFT DCE port on the iS
panel to your PC.
Figure 2 - Front Panel
6. Determine the iS3 baud rate, see Baud Rate Detection Procedure.
7. Add a standard modem.
a) Follow the sequence: Start + Settings + Control Panel.
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front
b) Click on Phone and Modem Options.
c) In the Modems tab, verify there is no Standard 33600 bps Modem already
installed. If you already have such modem installed, close this window and
continue with step 8.
d) Click on Add.
e) Check the Don’t detect my modem; I will select it from a list box.
f) Click on Next.
g) In the Manufacturers list, choose Standard Modem Types.
h) In the Models list, choose Standard 33600 bps Modem.
i) Click on Next.
j) Choose the port you want to use (Com 1, Com 2…) and click on Next.
k) Click on Finish.
l) In the Control Panel, double-click on Phone and Modem Options.
m) In the Modems tab, select Standard 33600 bps Modem and click on
Properties.
n) In the Maximum Port Speed section, choose the baud rate that corresponds to
the iS
3
(you must have already determined it on step 6).
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o) Click on OK, then on Close.
8. Create a PPP Connection.
a) In your desktop, click on My Computer.
b) Click on Dial-up Networking + New Connection.
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c) Name your connection iS
Direct Connection.
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d) Select Standard 33600 bps Modem.
e) Click on Configure.
f) Click on OK + Next.
g) Type in the telephone number “555” + Next + Finish.
h) Right click on your connection and select Properties.
i) Uncheck the Use area code box.
j) Select the Network Management tab.
k) Uncheck all the available boxes except TCP/IP.
l) Select the Running Script tab.
m) Click on Run and search for the script provided by Multitel (Multitel iS3
PPP.scp).
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n) Click on OK.
9. You are now ready to launch the connection; click on iS
3
Direct Connection +
Connect.
10. If the connection is not successful, revise the connection procedure and the cables.
11. After the connection has been established, click on Start + Run.
12. In the Open text field, type “winipcfg” and then click on OK.
13. Take note of the IP address.
14. Open you Internet browser and type the IP address that you jotted down minus
ONE. As an example, if you found the following IP address: 192.68.10.11, the iS
IP address will be 192.68.10.10.
At this point you should see the iS
3
web page.
PPP Connection Procedure (Windows 2000)
To establish communication with the iS3 using Windows 2000:
1. Connect a DB9 serial cable from the RS-232 CRAFT DCE port on the iS
panel to your PC.
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front
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Figure 3 - Front Panel
2. Determine the iS3 baud rate, see Baud Rate Detection Procedure.
3. Add a standard modem.
a) Follow the sequence: Start + Settings + Control Panel.
b) Click on Phone and Modem Options.
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c) In the Modems tab, verify there is no Standard 33600 bps Modem already
installed. If you already have such modem installed, close this window and
continue with step 8.
d) Click on Add.
e) Check the Don’t detect my modem; I will select it from a list box and click
on Next.
f) In the Manufacturers list, choose Standard Modem Types.
g) In the Models list, choose Standard 33600 bps Modem and click on Next.
h) Choose the port you want to use (Com 1, Com 2…) and click on Next.
i) Click on Finish.
j) In the Control Panel, double-click on Phone and Modem Options.
k) In the Modems tab, select Standard 33600 bps Modem and click on
Properties.
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l) In the Maximum Port Speed section, choose the baud rate that corresponds to
the iS
3
(you must have already determined it on step 0).
m) Click on OK, then on Close.
4. Create a PPP connection.
a) Click on Start + Settings and double click on Network and Dial-up
Connections.
b) Double click on Make New Connection and click on Next.
c) Choose Dial-up to the Internet and click on Next.
d) Choose I want to set up my Internet connection manually, or I want to
connect through a local area network (LAN), then click on Next.
e) Choose I connect through a telephone line and a modem, then click on
Next.
f) If you have only one modem installed, do the next step; if not, choose the
Standard 33600 bps Modem that you already created and click on Next.
g) Type the telephone number “555”.
h) Uncheck the Use area code and dialing rules option, then click on Next.
i) Do not enter any password, click on Next.
j) Click Yes on the warning.
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k) Name your PPP connection iS3 Direct Connection, then click on Next.
l) Answer No to the question: Do you want to set up an Internet mail account
now? Then, click on Next.
m) Do not check the To connect to the Internet immediately, select this box
and click Finish box. Click on Finish.
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n) In the Network and Dial-up Connections, right-click on iS
Direct
Connection and select Properties.
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o) Select the Security tab.
p) Select Run script.
q) Click on Browse and search for the script provided by Multitel (Multitel iS3
PPP.scp).
r) Select the Networking tab and click on Settings.
s) Uncheck the Software Compression option and click on OK.
t) Select Internet Protocol (TCP/IP)
u) Click on Properties + Advanced.
v) Uncheck the Use default gateway on remote network and click OK in the
following three dialog boxes.
w) Click on Start + Settings + Control Panel + Internet Options.
x) Select the Connections tab.
y) In the Dial-up and Virtual Private Network settings set up the default
connection, which you must have previously jotted down, and select the Never dial a connection, dial whenever option. Click on OK to exit.
5. Now you are ready to establish the connection, to do that: click on Start + Settings
+ NetworkandDial-upConnections + iS3 Direct Connection and then on Dial.
6. If the connection is not successful, check the connection procedure and the cables.
7. After the connection has been established, double-click on it, select the Details tab
to find the server IP address.
8. Launch your Internet browser and type the server IP address, press Enter. You
must access the iS
3
web page.
Baud Rate Detection Procedure
The iS3 baud rate is generally 115200 bps. If you have access to the iS3 configuration
files, use the iS
DCE port baud rate. The following procedure is useful in the case you don’t have
access to the configuration files and you need the baud rate to establish the
connection.
1. Make sure there are no open applications in your PC.
2. Launch the HyperTerminal application.
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Configuration Tool software to find out the iS3 RS-232 CRAFT
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a) Click on Start + Run.
b) In the Open text field, type “Hypertrm.exe” and click on OK.
3. Name your connection, ex.: iS
4. In the Connect using tab, choose the PC serial port you want to use to
communicate with the iS
3
.
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(usually Com1 or Com2) and click on OK.
5. In the Port Parameters window, change the bits per second to 115200 and click on OK.
6. Click on the main window to select it.
7. On your keyboard, press Enter four times. If you see the equipment identification
on the display, it means you have found the good baud rate. Then, the procedure is
finished.
8. If not, click on the Call menu, then select Disconnect.
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9. Click on the File menu, then Properties.
10. In the Connect using list of the Connect to tab, select the right port and click on Configure.
11. Change the Bits per second to the immediate lower available value and click on
OK.
12. In the Port Parameters window, click on OK.
13. Click on the main window to select it.
14. On your keyboard, press Enter four times. If you see the equipment identification
on the display, it means you have found the good baud rate.
15. Take note of the baud rate and close the window.
NOTE:
You should continue to try this procedure with the immediate lower value until you find the
correct baud rate.
Changing the PPP Connection Baud Rate (Windows 2000)
To change the PPP connection baud rate for Windows 2000:
1. Click Start + Settings + Network and Dial-up Connections.
2. In the Network and Dial-up Connections window, right-click on your connection
and select Properties.
3. In the General tab, click on Configure.
4. In the Maximum speed (bps) list, choose the desired baud rate and click on OK.
5. In the Properties windows, click on OK.
6. Click on Start + Settings + Control Panel.
7. In the Control Panel window, double-click on Phone and Modem Options.
8. Click on the Modems tab.
9. Double-click on the Modem standard 33600 bps.
10. Change the maximum speed to match the one previously set in the Network and Dial-upConnections window and click on OK.
11. In the Phone and Modem Options window, click on OK.
Your connection is now ready to be used with the new baud rate.
Changing the PPP Connection Baud Rate (Windows ‘98)
To change the PPP connection baud rate for Windows ‘98:
1. On your desktop, click on My Computer.
2. Double-click on Dial-up Networking.
3. Right-click on your connection and select Properties.
4. In the General tab, click on Configure.
5. In the Maximum speed section, select the desired baud rate from the list and click
on OK.
6. In the Properties window, click on OK.
Your connection is now ready to be used with the new baud rate.
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CHAPTER 2
Channels
Channels are a central concept to the iS3. Channels are used to retrieve information,
filter it, and raise alarms when any abnormal condition occurs.
For example, when connected to sensors, detectors or other measurement equipment,
channels can be used to monitor temperature in a telecommunications site, to detect
smoke, or to calculate the power dissipated by the load.
Different Types of Channels
Channels in the iS3 can be real or derived, analog or binary.
Channels are mainly differentiated by the type of information they produce (the
output of the channel). This means that a channel called a “binary channel” outputs a
binary value, whereas an “analog channel” outputs an analog value.
Moreover, channels are also differentiated by the source of the information they use.
Real channels are physically connected to equipment in the telecommunications site,
while derived channels use information from other channels; therefore, they are not
directly connected to a physical source in the site.
Channels MUST be
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1. Analog OR Binary,
AND
2. Real OR Derived
REAL DERIVED
ANALOG
BINARY
Figure 4 - Channel matrix
Real analog channel Derived analog channel
Real binary channel Derived binary channel
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Real Channels
Real channels are the most commonly known type of channels in remote monitoring
and site management equipment. A real channel in the iS
source, such as a detector activating a simple contact closure or an accessory
connected to a voltage source to be measured.
A real channel is associated with a connector at the back of the iS
detector or equipment is plugged in.
For example, a real channel can be connected to batteries to monitor their voltage, to
a motion detector to know when someone is in your site, or to a local generator set to
remotely or automatically control it in case of an AC power failure.
WARNING:
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is connected to a physical
3
, where the meter,
Unused pins in the J1 connector must be left unconnected since they are not protected against
high voltage, e.g. –48VDC and permanent damage to the iS
3
may occur.
WARNING:
The binary output loads must preferably be resistive and must not exceed 0.5A @60VDC.
Inductive loads must use protection diodes to prevent inductive voltage spikes when loads are
de-energized.
Real channels may return one of two types of information: binary information or
analog information. That is, binary channels return only binary information, while
analog channels return only analog information.
Derived Channels
Derived channels are also known as computed channels. A derived channel is not
connected to a physical source in your telecommunications site. It generally uses data
from other channels in the iS
3
, real or derived, to create a series of combinations of
information to actually suit your needs.
Derived channels are used to process information from any other channel in your
device. For example, a derived channel can be used to detect when battery voltage
exceeds acceptable limits, to compute the power consumed by the load, or to
calculate the difference between battery and ambient temperature.
Depending on the type of channel analog or binary, derived channels may return two
types of information: binary information or analog information. That is, binary
channels return only binary information, while analog channels return only analog
information.
Analog Channels
Analog channels can be real or derived. These channels provide an analog value. Any
analog channel may be used as the input for any other channel whose input is an
analog value.
Real analog channels are often connected to some kind of transducer (e.g.
temperature probe) that produces an analog signal. These channels read, digitize and
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return the value of the input signal. For example, an analog channel connected to a
temperature probe will produce a value that corresponds to the temperature reading
picked up by the probe.
Derived analog channels will be used to make calculations from any analog channel
value. For example, by adding the amperage from 3 real analog channels connected
to different loads in the telecommunications site, the derived analog channel
calculates the total current drawn.
There are several types of analog channels. To know more about real and derived
analog channels, read the Detailed Channel Description section.
Binary Channels
Binary channels can be real or derived. They are used to detect conditions, raise
warnings, or automate repetitive tasks. Any binary channel may be used as the input
for any other channel whose input is a binary value.
Real binary channels have two main states: ON or OFF. They are either connected to
a detector, such as a smoke detector, or to local equipment, such as a rectifier or LED
on the iS
When connected to a smoke detector, the binary input channel will turn on when
smoke is detected; when connected to a heat exchanger, the binary output channel
may turn on or off the heat exchanger.
Derived binary channels can be used in the automatic activation or deactivation of
warnings or equipment. They are usually utilized by other binary or analog channels,
and return a value – ON or OFF – that is used by other channels in the system.
For example, a derived binary channel can be used as a threshold to activate a high
voltage alarm. The binary channel monitors the battery voltage channel, and turns
ON when a certain level of voltage is reached. Derived binary channels can also be
used to delay the activation of a warning, to avoid false alarms.
There are several types of binary channels. To know more about real and derived
binary channels, read the Detailed Channel Description section.
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front panel.
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Channel Returned Values
Depending on their type, channels return different values. In short, as stated before,
analog channels return analog values and binary channels return simple ON/OFF
binary values. Channels can also return other values in some specific cases. For
example, if a channel appears in a system configuration but is configured as disabled,
it will return the special DIS value (disabled).
CHANNEL TYPE RETURNED VALUE COMMENT
ON Channel value is “Boolean” TRUE
OFF Channel value is “Boolean” FALSE
DIS Channel is disabled. Causes may be:
- Channel configured as disabled (in iS3
Binary
N/A Channel can’t return a value. Causes may be:
Note: For binary output channels, DIS and N/A will be interpreted as an OFF condition
NORMAL CONDITION
OVL+ Channel overflow (exceeds maximum value
OVL- Channel underflow (under minimum value
DIS Channel is disabled. Causes may be:
Analog
N/A Channel can’t return a value. Causes may be:
Note: OVL+ and OVL- conditions are correctly interpreted by binary threshold channels. Refer to
individual channel section for information on exceptions.
Configuration Tool)
- Too many sources of this channel returned
DIS
- Failure of channel (for real channels)
- At boot time (Initialization value)
permitted)
permitted)
- Channel configured as disabled (in iS3
Configuration Tool)
- Too many sources of this channel returned
DIS
- Failure or channel (for real channels
- At boot time (very short period)
- Invalid configuration
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Categories
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Table 1 - Returned values
The notion of category is tightly linked with the embedded Web interface that the iS3
system monitors offer you. Categories allow you to group channels, whatever their
types (real or derived, analog or binary) under user-defined categories. Here is an
example:
iS
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Figure 5 - Web page
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In the figure above, which is a typical page of the iS3 Web interface, the lower left
frame presents the user-defined categories. These categories were configured from
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the iS
Configuration Tool software.
All category names are configurable, except for the “System” category. You can
associate any channel to any category. Also note that a channel may belong to more
than one category. Hence, a channel returning battery temperature may be in the
environment category as well as the battery category, allowing a quick comparison
between battery temperature and ambient temperature channels.
Alarms and Alarm Priority
The notion of alarm may have several meanings. A device alarm may be
• An alarm sent to a hardware alarm-gathering unit,
• An SNMP trap sent to some SNMP managers that present those traps as alarms,
• Proprietary messages sent to a NEM (Network Element Management) system,
• Etc.
In the iS
channel.
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Configuration Tool, an alarm priority may be associated to every binary
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NOTE:
The specific notion of alarm is internal to the iS3 system monitoring device.
This is not linked in any way with other “higher level” alarm concepts. The alarms
you define in the iS
by the iS
3
system monitors. To report alarms to a central surveillance system, then
3
Configuration Tool only appear in the user interface provided
you may use SNMP, SMTP, simple ASCII text or even simple binary outputs.
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CHAPTER 3
Detailed Channel Description
The following chapter describes how the iS3 works. This will help you understand the
basic mechanism as well as make the relationships between the different functional
features.
Channels
As described in the previous chapter, channels are the basic source of information for
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the iS
. They are used to collect, filter and process information to the surveillance
technicians.
Channel Configuration
Before being used, all channels must be configured. The Windows-based iS3
Configuration Tool software is used to easily enter necessary parameters to configure
each type of channel. Even if the iS
use, it is mandatory to understand the concept of each type of channel. The following
sections will describe the type of channels supported, their use and finally provide
details relative to the channel characteristics.
It is also important to mention that each channel type is fully described by its
parameters and associated values.
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Configuration Tool is user-friendly and easy to
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Binary Channel Characteristics
Binary Channel Returned Values
A binary channel may return an ON or an OFF value. However, binary channels may
also return DIS and NA values.
DIS, for disabled, means either that the actual channel is configured as disabled and
thus, not in use, or that its sources are disabled. NA, which means not available, is
returned when a problem is encountered with the channel. For example, if a real
binary channel is defined as non-operational during the boot process, this specific
channel would then return an NA value. Since binary channel returned values often
appear as an input in a derived channel (for example, a binary equation), a truth table
needs to be defined in order to set known rules. Refer to Appendix A for a complete
truth table.
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Common Binary Channel Parameters
All binary channels have a similar set of properties that have to be configured before
being used. It is important to understand that each binary channel is individually
configurable.
This means that each individual binary channel has the following parameters:
Enabled : When disabled, the channel always returns a DIS value, which is
interpreted differently than ON or OFF. Refer to Appendix A for
a complete truth table.
Data Logging: Defines if each transition of the binary channel shall or shall not
be time-stamped and recorded into the data logging file (history).
Alarm Priority: This is the alarm priority associated with the channel. When the
channel goes from OFF to ON, an alarm condition is set. The
alarm priority goes from 1 to 7, 1 being the most important. A
value of 8 means no alarm.
Channel name: A string of up to 40 characters may be used to identify this
channel
Category: Categories are a practical way of grouping channels. There are
15 possible user-defined categories. Note that a channel may
belong to more than one category. Categories are mainly used
for filtering and sorting in the user interface. There is a 16th
category, called System, which is always defined and not userconfigurable.
Messaging
Autonomous message: When a binary channel turns ON, it may trigger the
sending of a message (SNMP trap, e-mail, etc). This
specifies which message to use.
Associated Channel: This field identifies a channel reference (often an analog
channel) that is the root cause for sending the message.
For example, a binary threshold may trigger an
autonomous message, but the root cause is the channel
associated with the analog value that is compared in the
binary threshold channel.
Binary Channel Occurrence Counter
Each binary channel has an occurrence counter associated to it. This counter is
incremented by one each time the binary channel returned value goes from any not
ON value to the ON value. The only exception is when the unit is powered up, when
the transitions form NA to ON is not recorded. This means that OFF to ON
transitions, DIS to ON transitions and NA to ON transitions all increment the
occurrence counter of the associated binary channel. The value of the occurrence
counter is accessible to the user through the use of the “Analog Binary Occurrence
Counter” channel.
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Binary Occurrence counters are reset to zero through user-configured conditions. The
maximum value of the occurrence counters is 32000.
NOTE:
There is no automatic return to zero when the occurrence counters hit their maximum value.
Analog Channels Characteristics
Analog Channel Returned Values
Analog channels are used to measure many different types of values: voltage,
temperature, current, etc. Analog channels return an analog value that sits within the
range of the programmed scale (SC parameter as shown in next section).
If the value is out of range, special values are returned: OVL+ or OVL-, which stands
for overload and under load respectively. Like binary channels, analog channels
might also return the special DIS and NA values.
VALUE MEANING
Any number The value is within the range of the programmed scale and
the channel is enabled
DIS The channel is disabled or its source(s) disabled.
NA The channel is not properly operating (abnormal condition)
OVL+ The value is out of range (overload)
OVL- The value is out of range (underload)
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Table 2 - Returned values for analog channels
Common Analog Channel Parameters
Each analog channel is individually configurable. Like binary channels, there is a
subset of configuration parameters that is common to all analog channels.
Enabled: When disabled, the channel always returns a DIS value, which is
interpreted differently than any other analog value.
Channel Name: A string of up to 40 characters may be used to identify this
channel
Engineering Units
Scale: This is a scaling factor that simply defines the full range of an
analog channel. For example, a scale defined as 80 means a full
range of –80 to +80.
Units: A simple character string of 5 characters or less used to identify
the units associated to the value returned by the analog channels.
“Volts”, “Amps”, “VDC”, “VAC”, are all valid examples.
Decimal places: This parameter defines the number of decimal places, or number
of digits after the decimal period. Note that this is only used to
display the internal values.
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