Zennio KES Series User manual

KES
KNX Energy Saver
ZN1IO-KES
Programme version: 1.0
Manual edition: a
PRODUCT MANUAL

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INDEX
1. Introduction................................................................................................................................................. 3
1.1. KES Energy Saver..................................................................................................................................... 3
1.2. Installation.............................................................................................................................................. 4
1.2.1. Measuring probe........................................................................................................................... 5
2. Configuration............................................................................................................................................... 6
2.1. Active Power........................................................................................................................................... 6
2.2. Active Energy .......................................................................................................................................... 7
2.3. Power Limits ........................................................................................................................................... 7
3. ETS Parameterization ................................................................................................................................... 9
3.1. Default configuration .............................................................................................................................. 9
3.2. General window.................................................................................................................................... 10
3.3. Channels ............................................................................................................................................... 14
3.3.1. Active Energy .............................................................................................................................. 15
3.3.2. Active Power ............................................................................................................................... 18
3.3.3. Power Limit Monitoring............................................................................................................... 20
3.4. Logical functions ................................................................................................................................... 23
Annex I. Time management............................................................................................................................. 24
Annex II. Further Examples.............................................................................................................................. 27
Annex III. Communication Objects................................................................................................................... 40

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1. INTRODUCTION
1.1. KES ENERGY SAVER
Zennio’s 3-channel energy saver, KES, combines in the same device the following features:
3 independent input channels. Each of them can be used to connect a measuring
probe (model ZN1AC-CST60) and to perform these actions:
Measuring and reporting instant active power consumptions (kW).
Measuring and reporting active energy consumptions (kWh).
Calculating and reporting the cost of the energetic consumption (with the possibility of
setting up 1 to 4 different tariffs) as well as the volume of the CO2emissions required to
generate such energy.
Monitoring power limits.
Hourly, daily, weekly and monthly report of total energy consumption, as well as upon
request (through a global request object).
Sending of the actual and average values of the consumed energy, its cost and the
corresponding CO2emissions (every day, every week, every month or upon request).
Support for single-phase and three-phase environments (two independent application
programmes).
Synchronisation capabilities through an external KNX clock.
Module with up to 5 multi-operation logical functions.
Figure 1.1. KES Energy Saver

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1.2. INSTALLATION
KES Energy Saver connects to the KNX bus via the bus connecting terminals.
The input channels are connected to KES through the terminal block with screws included in the
device packaging.
Once KES is provided with power supply from the KNX bus, both the individual address and the
associated application programme can be downloaded.
The connection scheme for KES is shown on Figure 1.2:
Figure 1.2. KES. Connection scheme
The functionality of the main elements is described below.
Programming button: a short press on this button sets the device to programming
mode, making the associated LED (2) light in red. If this button is held while plugging the
device into the KNX bus, KES goes into secure mode. The LED blinks red.
Input connection (4): the terminal block with screws must be plugged here (see Figure
1.3) to allow connecting the different input channels (A, B, C) to the device. One
measuring probe will be needed for each channel to be connected. Both terminals of each
probe must be inserted in the corresponding input points of the terminal block, depending
on the channel desired. For example, when intending to use the three input channels (A,
B, C), one probe will have to be connected to points 1 and 2 (the ones related to channel
A), another probe to points 3 and 4 (related to channel B) and a third probe to points 5
and 6 (related to channel C).
1.- KNX connector
2.- Programming LED
3.- Programming button
4.- Input connection

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Figure 1.3. Input terminal block
Note: The insertion order of the two terminal wires from the measuring probe to the connection
points of the KES channel does not affect the functionality, i.e., for channel A it is possible to
connect either the black wire from the probe into point 1 and the white cable into point 2, or either in
the inverse order.
1.2.1. MEASURING PROBE
The set-up process of the ZN1AC-CST60 measuring probe (Figure 1.4) is described next.
Figure 1.4. Zennio ZN1AC-CST60 measuring probe
These are the required steps:
Open the top clamp of the probe.
The phase wire from which the energy measures will be taken must be now passed
through the gap that has just been uncovered in the probe.
Close back the top clamp of the probe.
Connect the two wires of the measuring probe into the terminal block from KES, in
the two connection points corresponding to the channel being used.

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Note I: It is very important to keep in mind that no ordinary power supplies (230 V) or other
external supplies should be connected to either point of the KNX bus, nor directly to the terminal
block from KES.
Note II: KES Energy Saver does only measure the energy consumed by sinusoidal alternating
current (AC) lines.
In order to obtain more detailed information about KES technical features, as well as on security
and installation procedures, please read the KES Datasheet, included with the original packaging of
the device and also available at:http://www.zennio.com.
2. CONFIGURATION
2.1. ACTIVE POWER
KES Energy Saver calculates the value of the active power consumed by the device whose
phase line passes through the ZN1AC-CST60 probe, connected to one of the KES channels. This
active power is obtained from the effective intensity measured by the probe according to the
following relation:
 ·cos· efefact IVP 
where
ef
V
is the effective voltage of the line and
 cos
is the power factor. Both values must be
defined by parameter. The value of the effective intensity,
ef
I
, is obtained, as indicated above, once
the measuring probe is located around the electric line, and after the outputs of the probe are
plugged into one of KES input channels.
The measuring probe, and consequently KES, is able to measure effective intensities in the range
[0-60 A].
In addition to measuring instant active power, KES can also monitor the highest detected power, so
that power peaks can be calculated per hour, day, week and month, which may be interesting for
history managing purposes.

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2.2. ACTIVE ENERGY
Based on successive values of the instant power, KES Energy Saver can manage the count
of the total energy consumed per hour, day, week or month, as well as calculating daily, weekly
and monthly average consumptions.
KES can also make estimations of the energy that would be consumed during a whole day if the
current value of the instant power were kept constant for 24 hours. This estimation can be
expressed in terms of consumption (kWh) and in terms of cost (local currency).
Daily, weekly and monthly values of the actual energy consumed can be expressed in terms of
consumption (kWh), of cost (local currency), or even in terms of the CO2(kgCO2) sent to the
atmosphere in order to produce such quantity of energy.
If both, estimations and energy consumption, are set to be expressed in terms of cost, KES allows
specifying up to four different tariff values (in cents of the local currency per kWh).
2.3. POWER LIMITS
KES can also monitor the level of the consumed power in relation to certain limits, initially
defined by parameter: upper limit and lower limit (linked to an overconsumption alarm and to a
low-consumption indicator, respectively), and a certain margin (or deadband) respect to each of the
two limits.
Figure 2.1 shows an example of the process. When the instant power is higher than the upper limit,
KES sends an overconsumption alarm (if configured) and this will not be deactivated until the
instant power is back again lower than the upper limit minus the margin band. If the value of the
instant power keeps decreasing, KES will send (if configured) a low-consumption indicator as soon
as the power is lower than the lower limit. This indicator will remain active until the power is back
again higher than the lower limit plus the margin band.

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Figure 2.1. Power limit monitoring
These concepts are explained in detail in Section 3.3. Power limit monitoring.
P
t
Deadband
Lower limit
Deadband
Overconsumpt.
Alarm ON
Overconsumpt.
Alarm OFF
Low-consumpt.
Indicator OFF
Low-consumpt.
Indicator ON
Upper limit

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3. ETS PARAMETERIZATION
For beginning with the parameterization of KES it is necessary, once the ETS programme
has been opened, to import the product database (version 1.0 of the application programme KES
3xSingle-Phase).
Next, the device must be added to the project where desired. Right-clicking on the name of the
device will display the “Edit parameters”option, which allows the parameterization itself.
In the following sections a detailed explanation about each of the different features of KES under
ETS can be found.
3.1. DEFAULT CONFIGURATION
When no particular parameterization has been defined yet, the device and its objects will
show as in Figure 3.1.
Figure 3.1. KES 3xSingle-Phase. Default topology
Objects “Time” and “Date”can be seen in the list. They are intended to set the time and date of the
KES device by means of an external KNX clock. Their functionality and everything related to time
management will be detailed on Annex I. Time management.
“Global Reset” and “Global Request”can be found next. When enabled (by sending the value “1”),
the earlier will make every counter and every calculation reset to their default values, so every
object related to instant values, estimations, total values and average values that had been
parameterized will become zero, as well as every variable needed for calculating. In addition,
communication objects related to tariffs and the upper and lower limits will return to their original

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value, that is, the one parameterized through the corresponding ETS fields. After that the measuring
and calculating process will go on again. The value “0” written to this object will have no effect.
Regarding “Global Request”, the value “1” through this object will make KES send the value of
every communication object related to consumption (instant values, accumulate values, average
values, peak values, etc.) that has been enabled from ETS and, consequently, supposed to be sent
by KES at certain times.
The behaviour of the communication objects “Tariff x” and “Switch to tariff x”, shown by default, will
be detailed later.
3.2. GENERAL WINDOW
Figure 3.2. Default configuration screen

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As seen on Figure 3.2, the General screen permits the definition of generic parameters for the
operation of the Energy Saver, as well as specifying which channel or channels (A, B, C) will have a
ZN1AC-CST60 probe connected for measuring energy consumptions.
Each of these generic parameters is explained next:
AC Power Supply Voltage [V]: this field is to configure the effective voltage, in volts, of
the electric network.
Power factor [%]: this parameter defines, as a certain percentage, how the active power
(the one actually consumed by the load) and the total supplied power are related.
Carbon Dioxide Ratio: amount of CO2(in cents of a Kg) sent to the atmosphere to
produce one unit of energy (kWh).
Note: The value shown by default (0.5 kg CO2/kWh) is approximately similar to regular ratios
in Europe. It is always possible to change it by entering more precise values considering the
system to be monitored as well as directly establishing the exact value that can usually be
found on the electric bill provided by the electric supplier.
Tariff “x”. Initial value: initial value for tariff “x” (up to four different tariffs) that will be
considered when calculating the cost (estimated, actual or average) of energy consumptions.
This cost should be expressed in cents of the local currency.
KES lets define up to four tariffs with a different electric fee each, and switch from one to
another in runtime. To make this possible, there are four 1-bit objects (“Switch to tariff x”)
that allow, by sending the value “1”, changing from one tariff to another for cost calculation
purposes. These objects may be linked to an external KNX clock so that, for example,
depending on the time band in which KES takes consumption samples, one tariff or another
will be used, making cost estimations more precise.
It is also possible to change in runtime the value itself of each tariff. Four 2-byte objects
(“Tariff x”) can be found for this purpose, making it possible to update the value originally
defined by parameter.
Should any of the tariffs be unnecessary, the object “Switch to tariff x” may be left unlinked.
Date and time request on bus voltage recovery: defines how much time (1 to 255
seconds) KES should wait, on voltage recovery, before sending the time and date requests
through the KNX bus. See Annex I. Time management.

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Cyclical sendings: these parameters are destined to enable/disable periodic sendings
that affect every active channel. These periodic sendings include both, “security sendings” (in
other words, the re-sending of values that had already been calculated and reported to the
bus but that are sent again after certain periods) and consecutive sendings of certain updated
values. In order to achieve a better understanding of how KES counts these periods and the
exact instant when the sending takes place, it is recommended to read
Annex I. Time management.
Security sending of last daily values: allows enabling the periodic sending of
values related to the previous day, with the option of selecting cycle times of 1, 2, 3, 4, 6
or 12 hours (choosing “0” disables this sending). This way, all the daily values that had
been enabled under “Active energy” (see section 3.4. Active Energy) will not only be sent
at the end of the day, but also during the following day, every time the selected period
expires.
Note: Regardless of the selected period (0, 1, 2, 4, 6 or 12 hours), the re-sending of the
last daily values will not work unless at least one channel (A, B, C) is active and unless at
least one daily value has been enabled under the “Active Energy” screen.
Security sending of last weekly values: allows enabling the periodic sending of
values related to the previous week, with the option of selecting cycle times of 1 to 7 days
(choosing “0” disables this sending). This way, all the weekly values that had been
enabled under “Active energy” (see section 3.4. Active Energy) will not only be sent at the
end of the week, but also during the following week, every time the selected period
expires.
Note: Regardless of the selected period (0-7 days), the re-sending of the last weekly
values will not work unless at least one channel (A, B, C) is active and unless at least one
weekly value has been enabled under the “Active Energy” screen.
Security sending of last monthly values: allows enabling the periodic sending of
values related to the previous month, with the option of selecting cycle times of 1 to 30
days (choosing “0” disables this sending). This way, all the monthly values that had been
enabled under “Active energy” (see section 3.4. Active Energy) will not only be sent at the
end of the month, but also during the following month, every time the selected period
expires.

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Note: Regardless of the selected period (0-30 days), the re-sending of the last monthly
values will not work unless at least one channel (A, B, C) is active and unless at least one
monthly value has been enabled under the “Active Energy” screen.
Sending of daily, weekly and monthly peak power values: allows enabling the
periodic sending of the instant value of daily, weekly and monthly peak power, with the
option of selecting a cycle time of 1, 2, 3, 4, 6 or 12 hours (choosing “0” disables this
sending). This way, the peak power values that had been enabled under “Active Power”
(see section 3.5. Active Power) will not only be sent when corresponding for each one (at
the end of the day, the end of the week or the end of the month) but also every time the
selected period expires, letting the bus know how the peak values change during the
current day, week and month.
Note: Regardless of the selected period (0, 1, 2, 3, 4, 6 or 12 hours), the sending of the
peak power values will not work unless at least one channel (A, B, C) is active and unless
at least one of these peak values has been enabled under the “Active Power” screen.
Reset after Request?: when enabled (“Yes”), the value of the communication objects
and variables related the total consumption in a particular channel (A, B, C) will become zero
every time KES responds to a local request for the consumption values of that channel. This
local request is ordered by sending the value “1”through the object “[Cx] Request”. (See
section 3.3. Channels for further information).
Channels A, B and C: allows selecting what channels will be used for measuring. Once
enabled (“Yes”), the menu on the left will include a tab for the configuration screen of each
active channel (see section 3.3. Channels).
Logical functions: when enabling this parameter, the menu on the left will include a tab
for the configuration screen of the logical functions. See section 3.6. Logical functions for
further information.

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3.3. CHANNELS
Channel screens will show for the first time as follows:
Figure 3.3. Configuration screen for Channels
It is possible to independently enable the parameters Active Energy, Active Power and Power
Limit Monitoring for each active channel.
Moreover, after enabling a certain channel, three new 1-bit communication objects will come up per
channel: “[Cx] Reset”, “[Cx] Request” and “[Cx] Disable”. Note the distinction between the objects
“Global Request” / “Global Reset” (which affect all channels) and the objects “[Cx] Request” and
“[Cx] Reset” (which affect only a certain channel).
When the Energy Saver receives the value “1” through the object “[Cx] Reset”, every
communication object and variables related to estimations and average / total values of channel “x”
will be re-set to zero. Receiving the value “0” will have no effect.
When the Energy Saver receives the value “1” through the object “[Cx] Request”, it will report the
accumulate values –since the last reset–for the energy consumption, its cost and the carbon
dioxide emissions related to channel “x”. These values are reported through the communication
objects “[Cx] Total Energy”, “[Cx] Total Cost” and “[Cx] Total CO2 Emissions”, respectively, which
will automatically show up when enabling the corresponding option under ETS. In addition, if the
option “Reset after request”has been enabled under the General screen, whenever a “1” is
received through the object “[Cx] Request”, a reset process similar to the one described above will
also take place. Note that the three total objects are not intended to be read in an independent
manner; their values will only be sent to the bus all together, as a response to the “[Cx] Request”
object.
The object “[Cx] Disable”allows enabling (when the value “1” is sent) or disabling (when the value
“0” is sent) power measures for channel x. When measuring has been disabled, cyclic sendings
(those parameterizable from the General screen) as well as the sending of instant values (instant
power and peak power) and estimated values (energy and cost) do no longer take place.

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Nevertheless, every active energy consumption values (that is hourly, daily, weekly and monthly
values) or average values (daily, weekly and monthly) that had been parameterized under ETS will
still be sent, although they will not reflect any consumption made while the channel stays disabled.
It is recommended to read the examples from Annex II.
All the parameters from the Active Energy, Active Power and Power Limit Monitoring screens as
well as their configurable values for each channel will be detailed in the next pages.
Note: The screen captures shown here may refer to the configuration of Channel B. In that case,
similar parameterization and behaviours can be assumed for channels A and C.
3.3.1. ACTIVE ENERGY
This screen allows the configuration of several parameters related to the consumption of
active energy (Section 2.2). These show up grouped into sections, as explained below.
Estimated values. This section allows the configuration of parameters regarding the
estimation of active energy consumption, expressed in kWh, as well as its estimated cost, in
terms of the local currency. This estimation of the active energy consumed is made assuming
that the instant power consumption at the moment of the estimation remains constant during
the 24 hours of the current day.
Figure 3.4. Active energy. Estimations.

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Related to estimations two communication objects are shown: “[Cx] Estimated energy
consumption” and “[Cx] Estimated cost”. The following options are available for them:
Minimum time between sendings: allows setting the minimum time, in seconds,
that should pass between two consecutive sendings of the corresponding object (“Estimated
energy consumption” and/or “Estimated cost”), no matter if they are cyclic sendings or
sendings motivated by a change of the value. Valid times are [5-255] seconds. This
minimum time between sendings will only take effect if a value other than 0 is parameterized
for fields “Cycle time”or “Send on Value Change”.
Cycle time: allows setting the period for sending the objects “Estimated energy
consumption” and/or “Estimated cost”, in seconds. In other words, every how much time
these values will be sent to the KNX bus. Note that if the value specified here (x) is lower
than the minimum time between sendings (y), the latter will prevail, resulting in sendings
taking place only every “y” seconds. If “0” is parameterized for “Cycle time”, no periodic
sending of the associated communication object will take place.
Send on value change: allows setting a certain value so that whenever a change in
the estimated consumption (both in kWh or in units of the local currency) greater than this
value is detected, a new sending of the corresponding communication object (“Estimated
energy consumption” or “Estimated cost”) will happen. If there is no need of this feature,
just let this field be 0.
Note that if a value other than 0 is set for fields “Cycle time”and “Send on value change”,
the associated objects (“Estimated energy consumption” and “Estimated cost”) will also
be sent to the KNX bus whenever the value “1” is received through the communication
object “Global Request”.
Hourly Values. From this section it is possible to enable the sending of communication
objects related to the energy consumption during the last hour, either in kWh (object “[Cx] Last
hour energy consumption”) or as the associated cost (object “[Cx] Last hour cost”). These
objects will show up once their own parameters have been enabled.

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Daily Values. From this section it is possible to enable the sending of communication
objects related to the energy consumption (kWh) during the last day, their cost (local currency)
and the related CO2emissions (kgCO2). These objects are: “[Cx] Daily Energy Consumption”,
“[Cx] Daily Cost” and “[Cx] Daily CO2 Emissions”. It is also possible to enable the sending of
objects representing daily average values: “[Cx] Average Daily Energy Consumption”, “[Cx]
Average Daily Cost” and “[Cx] Average Daily CO2 Emissions”.
Objects referring to Average Daily values (energy consumption, cost or CO2emissions)
represent the total consumption (in kWh, local currency or kgCO2) of the day divided by the
number of hours of the day. In other words, they represent the average consumption per hour
during the last day.
Weekly Values. The sending of the communication objects related to the energy
consumption during the last week, its cost and its required CO2emissions can be enabled
from here, as well as of the objects representing weekly average values. These are “[Cx]
Weekly Energy Consumption”, “[Cx] Weekly Cost”, “[Cx] Weekly CO2 Emissions”, “[Cx]
Average Weekly Energy Consumption”, “[Cx] Average Weekly Cost” and “[Cx] Average
Weekly CO2 Emissions”.

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Objects referring to Average Weekly values (energy consumption, cost or CO2emissions)
represent the total consumption (in kWh, local currency or kgCO2) of the week divided by the
number of days of the week. In other words, they represent the average consumption per day
during the last week.
Monthly Values. The sending of the communication objects related to the energy
consumption during the last month, its cost and its required CO2emissions can be enabled
from here, as well as the objects representing monthly average values. These are “[Cx]
Monthly Energy Consumption”, “[Cx] Monthly Cost”, “[Cx] Monthly CO2 Emissions”, “[Cx]
Average Monthly Energy Consumption”, “[Cx] Average Monthly Cost” and “[Cx] Average
Monthly CO2 Emissions”.
Objects referring to Average Monthly values (energy consumption, cost or CO2emissions)
represent the total consumption (in kWh, local currency or kgCO2) of the month divided by the
number of days of the month. In other words, they represent the average consumption per day
during the last month.
3.3.2. ACTIVE POWER
From this screen it is possible to configure several parameters related to the consumption of
active power (section 2.2). These show up grouped into different sections, as explained below:
Instant power. This section is to configure those parameters that affect the sending of
the communication object “[Cx] Instantaneous Power”.

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These parameters are:
Minimum time between sendings: allows setting the minimum time, in seconds,
which should pass between two consecutive sendings of the object “Instant Power”, no
matter if they are cyclic sendings or sendings motivated by a change of the value. Valid
times are [5-255] seconds. This minimum time between sendings will only take effect if a
value other than 0 is parameterized for fields “Cycle time” or “Send on Value Change”.
Cycle time: allows setting the period for sending the object “Instantaneous Power”, in
seconds (0 –255). In other words, every how much time these values will be sent to the
KNX bus. Note that if the value specified here (x) is lower than the minimum time between
sendings (y), the latter will prevail, resulting in sendings taking place only every “y”
seconds. If “0” is parameterized for “Cycle time”, no periodic sending of the associated
communication object will take place.
Send on value change: allows setting a certain value so that whenever a change in
the instantaneous power greater than that value is detected, a new sending of the
corresponding communication object (“Instant Power”) will happen. If there is no need of
this feature, just let this field be 0.
Note that if a value other than 0 is set for fields “Cycle time” and “Send on value change”,
the object “Instant Power” will also be sent to the KNX bus whenever the value “1” is
received through the communication object “Global Request”.
Peak Power Values. This section allows the configuration of the sending of power peaks,
that is, the highest instant power values detected during the last hour, day, week or month.
Please note that –if enabled–hourly peak values can be sent not only at the end of the last
hour but also before the end, by means of the parameters Minimum Time between
sendings, Cyclical sending and Send on value change, which behave the same way as
described above for “Instant power”, making it possible to inform the bus about how the hourly
peak value changes throughout the hour. Regarding daily, weekly and monthly peak values,
they can be sent not only at the end of the day / week / month, but also periodically (with their

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updated instant values, that is, the peak value until the current portion of the current day, of
the current week and of the current month), however in this case this must be configured
under the General screen, with a unique parameterizable period for the three of them.
The associated objects in this case are “[Cx] Hourly Peak Power”, “[Cx] Daily Peak Power”,
“[Cx] Weekly Peak Power” and “[Cx] Monthly Peak Power”
3.3.3. POWER LIMIT MONITORING
From this screen it is possible to configure several parameters related to the monitoring of
power consumption in relation to upper and lower limits (section 2.3).
Two different sections can be found, one for configuring the parameters of the upper limit
and one for configuring the parameters of the lower one.
For the upper limit:
Initial value: allows setting (in tens of a watt) the value that, at least in the beginning, the
Energy Saver will assume as the upper limit while measuring power. If the value “0” is set,
KES will not consider monitoring power in relation to a particular upper limit. The value of the
upper limit, however, can be modified in runtime through the communication object “[Cx]