frako EML 1101 User manual

Safety Instructions
Important: Read Before Commissioning
• The user must ensure that all operators are familiar with this operating manual and follow it at all
times.
• The operating manual must be read carefully before the instrument is mounted, installed and
commissioned.
• All actions taken must follow the operating manual.
• Installation and commissioning may only be carried out by appropriately qualified personnel with
due regard for all rules and regulations that are in force.
• When the instrument is connected to mains voltage, it must not be opened.
• If the instrument is visibly damaged, it must not be installed, wired up or commissioned.
• If the instrument does not work after commissioning, it must be disconnected from the mains.
• Any further laws, standards, guidelines, etc. relevant to this product must be complied with.
Additional information on EML 1101 Maximum Demand Controller
• Loads which may cause damage or danger when disconnected by EML1101 must not be
connected to the load channels.
• The responsibility for correct load settings, such that proper operation is guaranteed and no
damage or danger arises, remains 100% with the customer.

Contents PRELIMINARY User Manual EML1101
Contents
Section Page
1 Quick Start 5
1.1 Programming via Front Fascia................................................................................................5
2 Description 7
2.1 FRAKO System options S, M and L........................................................................................8
3 Installation 8
3.1 Mounting .................................................................................................................................8
3.2 Electrical Connections ............................................................................................................8
3.2.1 Power Supply Voltage ........................................................................................................8
3.2.2 Connecting Inputs...............................................................................................................9
3.2.3 Connecting Load Channels ................................................................................................9
3.2.4 Alarm Contact for Hardware Error ......................................................................................9
3.2.5 Alarm contact......................................................................................................................9
3.3 Installing the OPT-SW software........................................................................................... 10
3.3.1 Hardware requirements: .................................................................................................. 10
3.3.2 Software requirements:.................................................................................................... 10
3.3.3 Installation........................................................................................................................ 10
4 Commissioning 11
5 Response in exceptional conditions 11
5.1 Self Monitoring ..................................................................................................................... 11
5.2 Restarting............................................................................................................................. 11
5.3 Memory ................................................................................................................................ 11
6 Operation 12
6.1 Keyboard.............................................................................................................................. 12
6.2 Programming mode.............................................................................................................. 12
6.2.1 Selecting program items.................................................................................................. 12
6.2.2 Activating programming mode......................................................................................... 12
6.2.3 Setting parameters .......................................................................................................... 12
6.2.4 Accepting settings............................................................................................................ 12
6.3 Menu Structure..................................................................................................................... 13
7 Basic Settings 14
7.1 Target maximum demand P1, P2, P3 and P4 ..................................................................... 14
7.2 . Current target maximum demand P1, P2, P3 and P4.................................................... 14
7.3 . Initial value target maximum demand P1, P2, P3 and P4.............................................. 14
7.4 . Upper limit target maximum demand P1, P2, P3 and P4 .............................................. 14
7.5 Peak power P1, P2, P3 and P4 ........................................................................................... 15
7.6 Control delay ........................................................................................................................ 15
7.7 Control Application Point...................................................................................................... 15
7.8 Emergency mode activated at XX% of total sheddable load power .................................... 15
7.9 Other settings....................................................................................................................... 15
7.9.1 Measuring period ............................................................................................................. 15
7.9.2 Counter constant ( P_act1, P_act2) ............................................................................ 16
7.9.3 Current transf. ratio Ip/Is: (P_act1, Q, P_act2) ........................................................... 16
7.9.4 Voltage transf. ratio Vp/Vs: (P_act1, Q, P_act2) ........................................................ 16
7.9.5 Average over (P_act1, Q, P_act2).............................................................................. 16
7.9.6 Counter constant (Q) ....................................................................................................... 16
7.9.7 Cosphi Alarm at cosphi <XX............................................................................................ 16
7.9.8 Bus address..................................................................................................................... 16
7.9.9 Auto summer/winter time changeover ............................................................................. 16
7.9.10 Options............................................................................................................................. 16
7.9.10.1 Number of Profiles Used 16
7.9.10.2 Highest EMD Address 16
7.9.10.3 Type of profile switching 17
7.9.10.4 Active Pulse Monitoring Alarm 19
7.9.10.5 . Group 19
7.9.10.6 Units 19
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User Manual EML1101 Contents
8 Load settings 20
8.1 Load name ........................................................................................................................... 20
8.2 Priority .................................................................................................................................. 20
8.3 Power ................................................................................................................................... 21
8.4 Preference............................................................................................................................ 21
8.5 Channel Status..................................................................................................................... 21
8.6 Minimum OFF time............................................................................................................... 21
8.7 Maximum OFF time.............................................................................................................. 21
8.8 Minimum ON time ................................................................................................................ 22
8.9 . Group.............................................................................................................................. 22
8.10 Changing load settings of group channels........................................................................... 22
8.11 Output................................................................................................................................... 22
8.12 Function testing.................................................................................................................... 22
9 Printer routines 23
9.1 Printing basic settings .......................................................................................................... 23
9.2 Printing load settings............................................................................................................ 23
9.3 Power failures ...................................................................................................................... 23
9.4 Errors.................................................................................................................................... 23
9.4.1 Error list............................................................................................................................ 24
9.4.2 Resetting error counters .................................................................................................. 24
9.5 Printing present day's power curve...................................................................................... 24
9.6 Printing previous day's power curve .................................................................................... 24
9.7 Power maxima of the last 50 days ....................................................................................... 25
9.8 Power maxima of the last 48 months................................................................................... 25
9.9 Event list............................................................................................................................... 25
9.10 Deleting printer queue.......................................................................................................... 26
10 Add-on stations 26
10.1 Activating/deactivating stations............................................................................................ 26
10.2 Displaying stations ............................................................................................................... 26
10.3 Virtual add-on units .............................................................................................................. 27
10.4 Activating virtual EMD .......................................................................................................... 27
11 External synchronisation 27
12 Setting time 28
13 Counters 28
14 Write protect 28
15 Info device 28
16 Technical Data 29
17 Troubleshooting 30
17.1 Checking programmed values ............................................................................................. 30
17.2 Control on the instrument..................................................................................................... 30
17.3 Printout from a directly connected printer ............................................................................ 30
17.4 Checking the system when running..................................................................................... 30
17.4.1 Standard display .............................................................................................................. 30
17.4.2 Display of switching channels.......................................................................................... 30
17.5 Sources of error ................................................................................................................... 31
18 Application instructions 33
18.1 Bus cable longer than 1 km ................................................................................................. 33
18.2 Shielding .............................................................................................................................. 33
18.3 Target Maximum Demand ................................................................................................... 33
18.4 Operating OPT-SW via modem ........................................................................................... 34
18.5 Technical terms/Glossary .................................................................................................... 34
19 Annex 36
19.1 Instrument software.............................................................................................................. 36
19.1.1 EML software update....................................................................................................... 36
19.1.2 Update preparation .......................................................................................................... 36
19.2 Table of settings................................................................................................................... 40
19.3 Form for Basic Settings........................................................................................................ 42
19.4 Form for load settings .......................................................................................................... 45
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Quick Start PRELIMINARY User Manual EML1101
19.5 Terminal assignments.......................................................................................................... 46
19.6 Connection diagram............................................................................................................. 47
19.7 Dimensions .......................................................................................................................... 48
20 Appendix 49
20.1 Glossary of Terms................................................................................................................ 49
20.2 Preference............................................................................................................................ 50
20.2.1 Power preference ............................................................................................................ 50
20.2.2 Time preference............................................................................................................... 50
4

User Manual EML1101 Quick Start
1 Quick Start
The instrument is commissioned as follows:
a) Copy and fill out Form for Basic Settings (page 42)and Form for Load Settings (page 45)
before commissioning.
b) Remove stoppers from the PG cable glands and connect the EML 1101 as shown in Figure 1 on
page 47. Please observe the directions in chapter 3 page 8.
c) Switch on power supply. The EML 1101 then performs a self-test.
d) Check if the inputs are functioning correctly:
− Active pulse input: The status display for Active pulse blinks.
− Time pulse input: The remaining time is reset and the next measuring period starts when a time
pulse is received. ‘No time pulse’ should not appear in the third line at the end of a measuring
period.
e) Carry out the settings procedure. This means programming of basic settings and load settings
using buttons on the front fascia or over a PC using OPT-SW software supplied. The second
option makes the configuration easier to understand. For this reason it is recommended to use the
PC software when installing for the first time. Refer to online help in OPT-SW if you require further
information.
Installation:
Start the program OPT-SW under Windows(e.g. Win 95 with the ‘Start’ button and the
menu item ‘run’, then enter >A:\setup.exe< A:\SETUP in the dialog box).
1.1 Programming via Front Fascia
1) Fascia keys:
- Use ‘arrow’ keys to choose menu items/Numbers.
- ‘CR’ key confirms menu item choice/Changes to next digit.
- ‘Menu’ key changes one menu level back/Accept choices.
2) Choose the menu item Basic settings.
3) The sub-menu item Target maximum demand P1 is displayed.
Select this by pressing CR button.
Target maximum demand P1:
6500.0kW
To prevent unauthorised use or accidental changes to
the instrument, a prompt is given for ID number. This
is shown only if no data has been entered for more
than 1 hour. The last four characters of the serial
number are to be entered as ID number. These are
given on the label on the top face of the terminal
compartment. Use the ‘arrow’ keys to choose numbers. Change to next number with the ‘CR’ key.
When ID is entered (e.g. 0631), press ‘Menu key’. If the ID is correct an underscore appears in the
display.
1) Enter values for target maximum demand and peak power according to Form for Basic
Settings.
2) Peak power is the maximum permissible active power. Enter a peak power value that is high
enough to prevent short high active power from causing a shut off.
3) To set measuring period, select menu item Basic settings | Other settings | Measuring period.
Measuring periods of 10, 15, 30 or 60 minutes can be chosen using cursor buttons.
4) List of settings in this sub-menu:
− Measuring period
− Maximum target demand P1,P2,P3, and P4
− current target maximum demand P1,P2,P3, and P4
− Current transf. ratio Ip/Is: (P_act1, Q, P_act2)
− Voltage transf. ratio Vp/Vs: (P_act1 ,Q, P_act2)
− Counter constant (P_act1, P_act2)
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Description PRELIMINARY User Manual EML1101
− Counter constant (Q)
− Average over (P_act1, Q, P_act2)
− Cosphi alarm when cosphi < XX%
− Bus address
− Auto summer/winter time changeover
Note: Settings made are immediately adopted by control system. Please note that when a new
Target maximum is selected, this value comes in effect immediately.
Load settings listed below can be set individually for every load channel and for every profile.
Load settings Values Description
Power 0 – 6500.0 Value in kW or MW
0 Load is always switched on
1 – 3 Load is only included in control system during
emergency mode
4 – 98 Load is included in control system
Priority
99 Load is always switched off
Channel status Always ON
Always OFF
Controlled
Selected state for all profiles
Output status NC
NO
Inverting of the contact state ON/OFF
Minimum OFF time 0 – 999:59 Value in minutes:seconds
Maximum OFF time 0 – 999:59 Value in minutes:seconds
Minimum ON time 0 – 999:59 Value in minutes:seconds
6

User Manual EML1101 Description
2 Description
Customers with a power consumption above typical values of about 30 kW are charged not only
according to their consumption for energy, but also according to the maximum power they draw.
In this context the term consumption refers to an average that is determined over a measuring period.
Usually the average is determined over a period of 10, 15, 30 or 60 minutes. The beginning and the
end of a measuring period are sent to the EML1101 by the energy supplier via pulse output on the
counter.
If a measuring period of 15 minutes is defined, the energy supplier subdivides every day into 24 x 4 =
96 measuring periods. At the beginning of each measuring period, an energy meter is set to zero.
The amount of consumed energy at the end of each measuring period is divided by ¼ of an hour and
thus becomes the mean power drawn during that particular measuring period.
There are various methods of charging maximum demand, but they all use a monthly basis of
calculation. In a 30 day month there are 96 x 30 = 2880 maximums, the highest of these mean power
values is charged by the utility. At the end of each month, maximum demand in kW is charged at a
certain rate of $ x / kW.
Example: Monthly maximum demand: 110 kW
Rate: $ 8.00 per kW per month
Maximum demand charge: $ 880.00
A very frequent example for charging maximum demand on a yearly basis: The 3 highest values over
a 12 month period are determined, These 3 values are then averaged and the result is charged with,
for example, $ 102.00/kW/year.
The relay outputs of the EML 1101 can be used to switch loads off. The EML 1101 has 4 switching
channels and an emergency channel for shedding loads. Extension stations with 8 switching channels
each can be connected over a 2 wire bus connection .
There are further outputs on the EML 1101 which will, however, not be dealt with in this introductory
chapter.
The EML 1101 is supplied with all relevant data for automatic maximum demand control over the
inputs. A trend is calculated with the current power used and the remaining time in the measuring
period. If this trend is higher than the set target maximum demand, channels are switched off, in as
much as their min/max times are maintained. If a trend is lower than the set target maximum demand,
deactivated channels with appropriate power demand can be switched on again
Time pulse rate: 1 per measuring period.
kWh pulse rate: dependent on counter constants, current and voltage
transformer ratios
Example: 15 Imp/kWh
W_max = P_max/T
Prognosis at t = t1: No need of action.
Prognosis at t = t2: Need of action: Loads are switched off until the
trend falls below W_max.
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Installation PRELIMINARY User Manual EML1101
2.1 FRAKO System options S, M and L
The EML 1101 is available in the following system options:
EML 1101
S4/S12/S20
- Bus prepared
- max. 2 EMD ( 4+2•8 = 20 channels)
- Output inversion
EML 1101 Additionally:
- FRAKO Starkstrombusavailable
- + 2 EMD (Max. 4)
- 3 Active pulse inputs with summation
- Target maximum demand
adjustment
EML 1101
Additionally:
- + 6 EMD (Max. 10)
- Grouping
Upgrades to higher system options are carried out with a PC is not necessarily require the assistance
of a service technician.
For ease of understanding the FRAKO system options are differentiated in the text as follows:
Function as of FRAKO system option:
Function as of FRAKO system option
3 Installation
3.1 Mounting
The EML 1101 is vertically screw mounted.
3.2 Electrical Connections
All cable connections are connected with plug-in terminal blocks. Connections are as shown in
Figure 1 Connection diagram. page 47. Stoppers should be left in PG cable glands which are not in
use.
3.2.1 Power Supply Voltage
Power supply voltage should be 230 VAC, 50/60 Hz. The device is protected by an internal fine-wire
fuse ( 250 mA slow-blow ).
Important:
The connections for power supply must be externally protected by a 2 A semi-time lag
fuse. When working on EML 1101, the unit must be switched off. If the alarm contact
is also used to signify power failures, then the alarm circuit must be protected
separately otherwise any failure of the 2 A fuse cannot be monitored.
8

User Manual EML1101 Installation
3.2.2 Connecting Inputs
The inputs for active pulse, time pulse and profile switching complies to S0 definition. The power
supply required is provided by the inputs. Both potential free contacts and electronic contacts can be
connected.
There are two inputs for profile switching, thus allowing 4 profiles to be selected.
Status of profile input 1 Status of profile input 2 Selected profile Counter
open open P1 1
close open P2 2
open close P3 1
close close P4 2
As can be seen from the table above, one of the 2 counters is chosen simultaneously with profile input
1. Profile input 2 does not influence the counter.
Caution:
No external voltages are to be applied to contacts 7 to 14 as this can destroy the input
circuit.
Important:
When working on EML 1101, ensure that the unit is disconnected from mains. Although
the EML 1101 is disconnected from mains, the circuits leading to switch contacts may
still be connected to power voltage.
3.2.3 Connecting Load Channels
EML 1101 load channels consist of switching contacts which consist of a normally open (NO) and
normally closed(NC) contact.
The NC part of the switching contacts takes on the following states in the listed operation conditions of
EML.
Load on: NC of the relay is closed
Load off: NC of the relay is open.
No power supply: NC of the relay is closed
Every channel of the add-on stations of the EMD1101 have only NC contacts. These can be used
either as NO or NC contact in the load settings. The position of the relay in emergency/power off can
be set with a DIP switch row on the EMD.
3.2.4 Alarm Contact for Hardware Error
The alarm contact for hardware error is a potential-free contact. The relay is open in normal operation
and energises if the processor of EML 1101 fails.
Important:
The switching and alarm contacts may only have a maximum rating of 250 V / 4 A.
3.2.5 Alarm contact
The contact is a potential free switching contact. The relay reacts when one of the following errors
occur:
- Target maximum demand exceeded
- Peak power exceeded
- Cosphi exceeded (too small)
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Commissioning PRELIMINARY User Manual EML1101
- EMD error/add-on bus error
- FRAKO Starkstrombusdefect
- No time pulse
- No pulse in input 1 (only with activated active pulse control)
- No pulse in input 2 (only with activated active pulse control)
- No pulse in input 3 (only with activated active pulse control)
- Mains power off
- Error in clock component
- Error writing to EEPROM
The relay remains in this condition until the error has been corrected. If there is an error, contact 29/30
is closed.
3.3 Installing the OPT-SW software
3.3.1 Hardware requirements:
• IBM compatible computer with CPU 80386/33MHz or higher
• 4 MB RAM
• 3½" 1.44 MB floppy disk drive
• Hard disk with at least 40 MB
• Serial communication ports COM1 and COM2 or COM 1 and PS2
• VGA graphics card and mouse
• Modem (optional)
3.3.2 Software requirements:
• Windows 98/NT/2000/XP
• Basic knowledge of Windows
3.3.3 Installation
 Select File | Run in Program Manager
Windows 95/98/NT
 Press Start button on the bottom left of the screen
 Select Run
 Enter A:\SETUP to start installation
10

User Manual EML1101 Commissioning
4 Commissioning
a) Fill in all data in the basic settings form and the load settings form.
b) Remove the PG covers from the necessary openings and connect the EML 1101 as in Figure 1
Connection diagram.on page 47:
c) Switch on the power supply. The EML 1101
then carries out a self test. The following is
dependant on program version and the FRAKO
system option.
EML1101 MAXIMUM DEMAND CONTROLLER
Version 2.11 L
d) The standard display is then shown.
P_act cosphi P_acc. Time rem.
0.0kW 1.0 0.0kW 15.00 P1
e) Check that all inputs are functioning correctly:
- Input pulse: the status display, Active pulse1 blinks at the same frequency as the active pulse.
- Time pulse input: the display of time remaining jumps to the pre-set measuring period as soon as
the time pulse is given. If then “Time pulse missing” is not shown, the function of time pulse input
is correct.
- Profile switching: The profile identified on the contacts 11 and 12 is shown in the second line. (e.g.
P1 for profile 1)
5 Response in exceptional conditions
5.1 Self Monitoring
The EML 1101 has an integrated self-monitoring system. It identifies power failures and system
errors. These events are then entered in a power failure table that can be printed out.
A power failure is then only registered if power supply is disconnected for more than 2 seconds.
5.2 Restarting
The EML 1101 automatically begins to operate after power supply is restored.
5.3 Memory
Data programmed is retained for approximately 10 years in the event of a power failure.
Note: The programmed values should be rechecked if the unit is isolated from power supply for a long
period.
11

Operation PRELIMINARY User Manual EML1101
6 Operation
6.1 Keyboard
Cursor buttons
− Navigating in menu structure
− Changing values and settings
− Setting numbers
Carriage Return button
− Selecting a menu
− Moves cursor to next position
− Activating stations
− Printing
MENU button
− Ascend to the next higher menu level
− Proceed to display mode after reset
− Accepting values and settings
6.2 Programming mode
6.2.1 Selecting program items
Use one of the two cursor buttons to call up the settings menu.
6.2.2 Activating programming mode
A prompt is given for the ID number when the appropriate item is seen in the display. The last 4 digits
of serial number are to be entered. If the ID number has already been prompted from a previous
entry, then it will not be prompted again for the next hour.
6.2.3 Setting parameters
If a cursor appears in the display, then the individual numbers can be adjusted by pressing the cursor
buttons. Pressing CR button moves the cursor to the next position.
6.2.4 Accepting settings
The setting are accepted by pressing MENU button. If an invalid entry (e.g. time/date) has been
entered, the old settings will appear. In this case repeat the entry.
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User Manual EML1101 Operation
6.3 Menu Structure
Basic settings
Target maximum demand P1, P2, P3 and P4 [ current target maximum demand P1,P2,P3 and P4] (section 7.1/7.2)
• Initial value target maximum demand P1, P2, P3, and P4 (section 7.3)
• Upper limit target maximum demand P1, P2, P3 and P4 (section 7.4)
• Peak power (section 7.5)
• Control delay (section 7.6)
• Control application point at XX% of target maximum demand (section 7.7)
• Emergency mode activated at XX% of total sheddable load power (section 7.8)
• Other settings (section 7.9)
♦ Measuring period (section 7.9.1)
♦ Counter constant (P_act1, Q, P_act2) (section 7.9.2, 7.9.6)
♦ Current transf. ratio Ip/Is (P_act1, Q, P_act2) (section 7.9.3)
♦ Voltage transf. ratio Vp/Vs (P_act1, Q, P_act2) (section 7.9.4)
♦ Average over (P_act1, Q, P_act2) (section 7.9.5)
♦ Cosphi alarm at cosphi <XX% (section 7.9.7)
♦ Bus address (section 7.9.8)
♦ Auto summer/winter time changeover (section 7.9.9)
♦ Options (section 7.9.10)
− Number of profiles used (section 7.9.10.1)
− Highest EMD address (section 7.9.10.2)
− Type of profile switching (section 7.9.10.3)
− Time pulse edge (section 7.9.10.3.1)
− Self adjusting target maximum demand (section 7.9.10.3.2)
− Active / non active (section 7.9.10.3.3)
− Resetting via external signal/ resetting via internal date (section 7.9.10.3.4)
− Active pulse monitoring alarm (section 7.9.10.4)
− Allow grouping (section 7.9.10.5)
− Units (section 7.9.10.6)
Load settings (section 8)
• Profile 1..4 (Depends on the number of profiles used) (section 8)
♦ Enter station and channel no.: EML / 1..4, EMD1..EMD10/1..8 (section 8)
− Name: (section 8.1)
− Priority: (section 8.2)
− Channel status (section 8.5)
− Output (section 8.11)
− Group (section 8.9)
− Minimum OFF-time: (section 8.6)
− Maximum OFF-time: (section 8.7)
− Minimum ON-time: (section 8.8)
− Preference (section 8.4)
− Power: (section 8.3)
Printer routines (section 9)
• Printing basic settings (section 9.1)
• Printing load settings (section 9.2)
• Power failures (section 9.3)
• Errors (section 9.4)
♦ Error list (section 9.4.1)
♦ Resetting error counters (section 9.4.2)
• Present day’s power curve (section 9.5)
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Basic Settings PRELIMINARY User Manual EML1101
• Previous day’s power curve (section 9.6)
• Power maxima of the last 50 days (section 9.7)
• Power maxima of the last 48 months (section 9.8)
• Event list (section 9.9)
• Delete printer jobs (section 9.10)
Add-on stations (section 10)
• Activate/deactivate stations (section 10.1)
• Display stations (section 10.2)
External synchronisation (section 11)
Clock (section 12)
Counters (section 13)
Write protect (section 14)
Instrument info (section 15)
7 Basic Settings
Select Basic settings menu item by using cursor
buttons and program this by using CR button to enter
the setting mode or the next menu level.
Basic settings
7.1 Target maximum demand P1, P2, P3 and P4
Target maximum demands for profiles 1 to 4 is entered here. There is an individual menu item for
each profile (e.g. Target maximum demand P3). Depending on the profile activated, one of the four
target maximum demand settings is valid.
The target maximum demand is, the more cost savings is going to be. However, there is danger of
loads connected may be switched off too often or for too long due to emergency mode being
activated. Therefore, an optimal compromise should be found.
It is advisable to sink the target maximum demand step by step until you have an optimal compromise
between load availability and cost saving. Do not forget to take seasonal variations into consideration
e.g. additional costs for heating/cooling etc.
7.2 .Current target maximum demand P1, P2, P3 and P4
If under basic settings|other settings|options the self adjusting target maximum demand is activated,
the current target maximum demand will be displayed instead of the menu item target maximum
demand. This is the momentary target maximum demand for the appropriate profile. If the target
maximum demand is exceeded, it is automatically set to the new value as long as this is not higher
than the set upper limit.
If a value greater than the upper limit is set, the upper limit is automatically set as the current target
maximum demand. In this case there is no further target maximum demand correction, as the upper
limit has been reached.
7.3 .Initial value target maximum demand P1, P2, P3 and P4
If under basic settings|other settings|options the self adjusting target maximum demand is activated,
the initial value of the self adjusting target maximum demand must be entered here. This is set at the
beginning of an electricity company calculation period. The number of initial values depends on the
number of profiles used.
If a value is greater than the upper limit (see section 7.4) is set, the upper limit is automatically set as
the initial value of the target maximum demand. In this case there is no further target maximum
demand correction, as the upper limit has been reached.
7.4 .Upper limit target maximum demand P1, P2, P3 and P4
If under basic settings|other settings|options the self adjusting target maximum demand is activated,
the upper limit of the target maximum demand can be entered here. Every time there is a power
excess, it is checked if this limit has been exceeded. If this is the case there is no further target
maximum demand correction above this limit. ‘Upper limit reached’ is then entered in the event list.
14

User Manual EML1101 Basic Settings
If the upper limit is set too low and the initial value and the current target maximum demand are set
higher, these values will be set automatically to the set upper limit.
7.5 Peak power P1, P2, P3 and P4
The absolute limits for actual power P_act is set here for every profile. This function is an extra
function provided by EML1101; not to be confused with the control of maximum demand. Depending
on the profile activated one of four peak powers is valid.
As soon as P_act exceeds this peak power limit, an alarm is activated and loads are shut off one after
the other until P_act falls below this limit.
Loads are shut off according to the following rules:
- Loads with low priority are shut off first.
- The minimal on times and maximum off times are not taken into consideration.
- Loads with priority 0 and loads that are set to ON in the OPT-SW are not shut off.
The peak alarm is not shut off until P_act has dropped lower than 95% of the peak power.
Loads are turned back on according to the following rules:
- Loads remain off at least as long as their set minimum OFF time. Loads where the minimum OFF
time expires first are turned back on first. If a number of loads minimum OFF times have expired,
the loads with the highest priority are turned on first.
- The individual switching follows according to the set control delay time.
- Before the loads are switched on a check takes place to ensure that this will not cause a new
peak power excess.
This function prevents overloading of transformers and generators, blowing of main fuse or tripping of
main circuit breaker. All of these may become very costly for e.g. a manufacturing plant.
7.6 Control delay
The control delay serves to force pauses between the ON/OFF switching of loads. This avoids over
reaction of the controller in form of unnecessary switching of loads.
If a large number of switching channels are used the control delay time should be set low (1-10
seconds) in order to avoid long periods of inactivity.
Control delay is not taken into consideration in emergency mode and in the last 2 minutes of a
measuring period, as an especially fast reaction time here is absolutely necessary.
Factory default setting is 10 seconds, it can be set from 1 to 60 seconds.
7.7 Control Application Point
Factory default setting is 35% and the range is from 0 to 75%.
Smaller values mean more sensitive control.
7.8 Emergency mode activated at XX% of total sheddable load
power
If loads switched on reached a specified size, then the EML 1101 can no longer maintain the condition
stated and activates the emergency mode. In the emergency mode channels with priorities 1-3 are
normally included (see section 8.2). As a last consequence the emergency channel will be activated.
The emergency mode is activated when P_corr is higher than the percentage X of the nominal power
of all loads included in the regulation.
Factory default setting is 45%, the possible settings range from 10 to 80%.
Smaller values lead to more sensitive control: Emergency mode is activated more readily.
7.9 Other settings
You can change to the next menu level with this menu item. Change with the CR button.
7.9.1 Measuring period
The measuring period used by electricity company is set here. Possible settings are 10, 15, 30 and
60 minutes.
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Basic Settings PRELIMINARY User Manual EML1101
7.9.2 Counter constant ( P_act1, P_act2)
Here the number of pulses emitted per kWh by the energy meter is entered.
The parameter P_act2 of the 2nd active pulse input can be set for EML 1101 M and L.
7.9.3 Current transf. ratio Ip/Is: (P_act1, Q, P_act2)
Enter the ratio of the current transformer(CT) in use here. This is printed on the CT. If there is no CT 1
is entered.
7.9.4 Voltage transf. ratio Vp/Vs: (P_act1, Q, P_act2)
With medium voltage measurement the transformer ratio of the voltage transformer (VT) must be
entered. Enter the ratio of the VT in use here. This is printed on the VT. If there is no voltage
transformer used, i.e. for low voltage measurements (e.g. 400 V), the value 1 is entered.
7.9.5 Average over (P_act1, Q, P_act2)
This setting serves to calculate an average of the registered number of pulses in nets with high
transient power variations. If this function is used, transient power variations are smoothed and
unnecessary load switchings can be avoided.
7.9.6 Counter constant (Q)
Enter the pulse values of the pulse counter here.
7.9.7 Cosphi Alarm at cosphi <XX
This setting sets the threshold value for triggering power factor alarm. If a value of 0 is set, the power
factor alarm function is disabled and the standard display shows the correction value P_corr instead of
the cosphi value.
If the limit is exceeded the error message cos(ϕ) – error is displayed and the alarm is activated. The
error is deleted when the lower limit is exceeded.
7.9.8 Bus address
This setting assigns an individual address for EML1101 so that the central unit EMIS 1500, the EMG
1500-PN, the communication processor EMP 1100 or the system timer EMT1101 can identify the EML
1101 at the FRAKO Starkstrombus.
Both bus systems, the FRAKO Starkstrombusand the add-on bus apply to the field bus standard EN
50170.
If the EML is not to be run on a bus, ignore this setting.
After reset the bus address is set to 0.
Be sure when setting the bus address that no other instrument connected to the bus has the same
bus address.
7.9.9 Auto summer/winter time changeover
Automatic daylight saving time changeover can be activated in this menu item. The changeover
occurs on the last Sunday in March at 2 am and the last Sunday in October at 2 am.
7.9.10 Options
This menu item allows access to the next menu level. This is done by pressing CR button.
7.9.10.1 Number of Profiles Used
This setting enables the number of profiles to be used according to requirements. The number of
profiles used determines how many sets of basic and load settings are to be used. A maximum of 4
profiles is possible.
7.9.10.2 Highest EMD Address
The highest possible EMD address enables the number of add-on stations activated to be limited.
Consequently, only data for the corresponding number of EMD 1101 can be displayed and changed.
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User Manual EML1101 Basic Settings
System option Max. number of add-on stations Corresponds with:
EML+ EMD
S 2
4 + 2 •8 = 20 Channels
M 4
4 + 4 •8 = 36 Channels
L 10
4 + 10 •8 = 84 Channels
The factory default setting is 0.
7.9.10.3 Type of profile switching
Please clarify with your electricity company how invoicing with tariff switching is carried out. There are
three settings which can be chosen.
Setting Description
Immediate switching Immediately after a profile switch, the new settings for
the new profile take effect.
Immediate switching, P_acc = 0 Immediately after a profile switch, the new settings for
the new profile take effect. The accumulated value is
reset to 0.
Switching at the begin of measuring period Regulation runs with the last set values. The new values
take effect at the beginning of the new measuring period
The factory default setting is Immediate switching.
7.9.10.3.1 Time Pulse Edge
This setting tells the EML 1101 which time pulse edge is used for it to respond. This setting is used to
optimise target maximum demand and relays for inverting time pulses are not required.
The type of edge used by electricity company counter resulting in an end of a measuring period and
the start of the next can be either positive or negative. The four possibilities are shown in diagram
below:
HI: Contact open
LO: Contact closed
Opener Shutter
1 + 4 positive edge
2 + 3 negative edge
7.9.10.3.2 . Self adjusting target maximum demand
If the EML 1101 cannot keep to the set target maximum demand, e.g. because the basic load is too
high, an excess occurs. In this case it is sensible to adjust the target maximum demand to the level of
the excess, as the electricity company will use the registered value for the current billing period.
In the case of electricity contracts where only the maximum value reached is billed, it is sensible to set
the initial value under the lowest annual maximum. In this way it is possible to take advantage of the
seasonal variations
The most important channels should be set to ‘Time’ preference, in order to retain their switching
times in emergency mode.
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Basic Settings PRELIMINARY User Manual EML1101
If the current target maximum demand is exceeded the registered value is adopted as the new target
maximum demand. The settings for the self adjusting target maximum demand can be set under this
menu item.
Term Description
Initial value target
maximum demand
Target maximum demand that is to be set as current target
maximum demand at the beginning of a new billing period
Upper limit target
maximum demand
Determines up to which limit self adjusting target maximum demand
can be carried out
Current target maximum
demand
This is the value to which regulation will be carried out. Changes of
this value will be immediately included in regulation!
The self adjusting target maximum demand resets the target maximum demand after an excess to the
level of the excess. The upper level target maximum demand determines the highest level to which
target maximum demand can be adjusted. If this is exceeded there will be no adjustment . All
adjustment or excesses will be entered in the event list (see chapter 9.9 Event list on page 25).
At the beginning of the adjustment it can occur that the instrument operates in emergency mode for a
longer period because the initial value is set too low. The initial value must then be set higher. If you
wish to retain the low initial value and some channels should retain their switching times, choose
‘Time preference’ in the load settings. (8.4 Preference on page 21)
Programming:
1) Enter upper limit for the individual profiles.
2) Enter initial value target maximum demand for the individual profiles. Choose a lower value
than the one that has been set until now. Initial value target maximum demand must be set
lower than the upper limit! Initial value target maximum demand is first adopted as the current
target maximum demand when a reset via contact or date has taken place. The current target
maximum demand should be set to initial value target maximum demand during the first
configuration.
7.9.10.3.3 Active/inactive
You can choose to activate/deactivate the self adjusting target maximum demand with the cursor
buttons.
7.9.10.3.4 Resetting via external signal/ resetting via internal date
Choose reset via contact if your electricity company gives you a potential free contact for
synchronisation of the billing period. Set the type of the reset edge with the front fascia buttons.
Positive/contact opens negative/contact closes both/closing and opening
Ed
g
eEd
g
e
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User Manual EML1101 Load settings
Choose reset via date when the electricity company carries out the counter reading (e.g. at an exact
time given every month on the 27th day at 4am.) The reset day and time are set with the front fascia
buttons.
7.9.10.4 Active Pulse Monitoring Alarm
The maximum time that may elapse between two active pulses before an alarm is triggered can be
entered here.
If a number of inputs are used (as of FRAKO system option ) a time must be entered that is
distinctly higher than the maximum time between two pulses. The input with the lowest pulse rate
dictates this value. If one of the 3 inputs exceeds this time, an alarm is activated and it is entered in
the event list.
The factory default setting is 0. This setting disables this monitoring function.
7.9.10.5 . Group
Grouping means that groups can be formed with related loads.
An example for grouping in a sheet metal work.
In this case it should be switched as follows:
Turnoff Turnon
1) Stop material supply 1) Turn on cooler
2) Turn off heat 2) Start roller
3) Stop roller 3) Turn on heat
4) Stop cooler 4) Start material supply
Load 1, priority 10
Load 2, priority 8
Load 3, priority 6
Load 4, priority 4
If the minimal off time is not fulfilled in the above example, the load will not be switched on. Loads that
do not belong to a group can be switched, between the individual switching of the group. Up to 8
groups are possible. The group numbers serve to differentiate the individual groups. The switching
order of the groups themselves, is determined alone by the priority of the individual channels. (See
section 8.9 .Group).
7.9.10.6 Units
This menu item enables a changeover from kW to MW.
The highest adjustable maximum demand is 6500kW or 6500MW.
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Load settings PRELIMINARY User Manual EML1101
8 Load settings
Programming load settings can be done through the front fascia of EML 1101 or through OPT-SW
software (see section 3.3.3 Installation).
Program the load characteristics for every load channel used. Programming via the front fascia:
Select menu item Load settings with cursor buttons
and press CR button.
Load settings
Load settings
Profile 1
Select the profile for which the load settings are to be
changed with cursor buttons and press CR button.
Load settings
Enter station and channel no.: EML / 1
The EML 1101 prompts for an entry of the station,
whereby station means EML 1101 or EMD 1101 Add-
on Station connected. Using cursor buttons, first
select the station. Then press CR button. Then select
the channel in the station. After the CR button is
pressed the channel name is shown and can only be changed with the OPT SW software. From this
menu item, use cursor buttons to proceed to other load settings. If an incorrect value is entered, press
MENU button to return to previous display and repeat the steps again.
Parameters to be set:
− Power: Entry as four-figure number in kW
− Define channel status
− Minimum ON time: Up to 999:59 minutes:seconds
− Maximum OFF time: Up to 999:59 minutes:seconds
− Minimum OFF time: Up to 999:59 minutes:seconds
− Output: Opener/closer
− Define channel status: On/off/controlled
− Priority: two-figure number
− Group
8.1 Load name
This can only be changed using the configuration tool OPT-SW supplied. As factory settings, load
names are set as in the following example:
Channel 3 in EMD 2
Please note that when overwriting the entry with the OPT-SW, a unique name must be assigned for
every consumer.
The name can have a maximum of 20 characters.
8.2 Priority
Priority Description
0 Always on in this profile
1 Most important channel
1-3 Channels that are only switched off in emergency mode.
It is not possible to set a min. ON time and a max OFF
time for priorities 1-3 under ‘POWER’ preference, as
they are only switched in emergency mode. The set time
are also observed in emergency mode under ‘TIME’
preference.
4-98 These priorities are switched in normal mode and in
emergency mode.
98 Least important channel
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