Companion energy management
Contents
1. You will use the same screen to add modify or delete a Demand Limiting loadset To set up a Demand Limiting loadset 1 From the Main menu press E to select the Energy Management option The Energy Management menu appears 2 Press D to select the Demand Limiting loadset option The first undefined loadset number is displayed For example if you have 15 loadsets defined number 16 appears in the Loadset Number field If the maximum number of loadsets 16 has been defined the Loadset Number field appears blank Modifying a Loadset To modify a loadset enter the number of the loadset in the Loadset Number field The loadset appears Adding a Loadset Press Enter A new Loadset Modify Add Delete screen appears The point fields will be blank Deleting a Load Rolling Loadset To delete a Load Rolling loadset enter the number of the Load Rolling loadset in the Load Rolling Loadset Number field The Load Rolling loadset appears Enter Del in the Loadset Enabled field and skip to Step 4 Operator Name S Johnson Thu Dec 1 1994 Demand Limiting Loadset Demand Meter 1 Electric Meter Loadset Number 1 Loadset Enabled Yes If Current Demand Is gt 95 Of Demand Target THEN Shed This Loadset If Current Demand Is lt 90 Of Demand Target THEN Release This Loadset Minimum Shed Time minutes 15 Maximum Shed Time minutes 30 Minimum Release Time minutes 15 Point Point 60 Exhaust Fan 61 Exhaus2. 9999999 E00 9999999 08 00 1400 00 00 1900 L772 00 9999999 Fl Cancel F2 Save Figure 75 Demand Limiting Schedule Screen 3 Fill in the fields Press Enter to move the cursor from field to field Table 23 explains the fields 4 Press F2 Save to save the new Demand Limiting Schedule to the System data base Demand Limiting The following table explains the fields you will use to set up the Demand Schedule Fields Limiting Schedule Table 23 Demand Limiting Schedule Fields Field Type Description Options Required Alpha Multiple Range Numeric Choice Start On Peak Specifies the starting times 00 00 to Yes 00 00 X Start Mid Peak for three different Demand 23 59 in or Start Off Limiting schedule periods 24 hour Peak Times are specified in 24 format hour format Demand Target Specifies a maximum Yes 9999999 X acceptable value target for peak energy demand This peak is an average in any interval during a scheduled period Rate Engineering Units are specified Companion Users Manual 153 Setting Up The third part of setting up Demand Limiting is to set up the loadsets A loadset Demand Limiting is a group of loads A load is a Binary Output BO point corresponding to a Loadsets piece of equipment that Demand Limiting will turn off to limit energy consumption An exhaust fan is a typical load You can define up to 16 loadsets and each loadset can have up to eight BO points
3. Field FiedType Description Options Required a a Range Numeric es Used for Specifies the point that is Yes or No Demand monitored for Demand Limiting Limiting calculations Demand Specifies what the utility 1 to 60 Interval company defines as their demand interval time in minutes Setting Up the The second part of setting up Demand Limiting is to create the Demand Limiting Demand Limiting Schedule which specifies the targets that you do not want energy consumption to Schedule exceed To set up the Demand Limiting Schedule 1 From the Main menu press E to select the Energy Management option The Energy Management menu appears 2 Press S to select the Schedule Demand Limiting option The following Demand Limiting Schedule appears Figure 75 Note that the name of the AC point defined as the demand meter appears at the top of the screen Note Ifno AC point is defined for Demand Limiting an error message appears and you will not be allowed to access the Demand Limiting Schedule screen In this case define an AC point for Demand Limiting and try accessing the Demand Limiting Schedule screen again 152 Companion User s Manual Operator Name S Johnson Thu Dec 1 1994 Demand Limiting Schedule Demand Meter 1 Electric Meter Current Demand Target 1700 KW Start Demand Start Demand Start Demand On Peak Target Mid Peak Target Off Peak Target 07 00 1800 12 00 1900 17 00 1700 07 00 1600 00 00
4. control inappropriate for DL and therefore removed as a DL loadset Specifies when DL sheds this loadset relative to the target consumption Specifies when DL releases this loadset relative to the target consumption Specifies the shortest period of time that this loadset can be shed Use this parameter to avoid cycling the loadset excessively Specifies the maximum period of time this loadset can be kept from operating before it must be released Use this parameter to force DL to release loads before their absence will be significantly missed Specifies the shortest period of time that this loadset must remain released Use this parameter to allow loads to have some functional impact before being shed again by DL At least 1 and as many as 8 points can be specified for each loadset Each point specifies a particular load Entries must be defined BO software points that are unique to that loadset 156 Companion User s Manual Yes No Del 1 to 100 percent 1 to 100 percent but must be less than the value specified above 1 to 240 minutes 1 to 240 minutes Any defined BO point 1 to 240 N A minutes but must be greater than minimum shed time value specified above Defining Load Rolling Setting Up Load Rolling Loadsets To define Load Rolling loadsets you must have a System capability password Load Rolling works as follows e You define up to 16 Load Rolling loadse
5. 0 1809 At 12 56 On Mar 603180 1500 At 13 01 On Apr 690100 1645 At 12 23 On May 790100 1660 At 13 34 On Jun 823100 1500 1 At 13 53 On Jul 903550 1431 At 12 23 On Aug 873451 18127 At 13 20 On Sep 863410 1781 At 12 30 On Oct 821810 LOLI At 12 10 On Nov 995510 2077h At 13 48 On Dec 101800 802 At 12 01 On Yearly Total 8719722 NU NN UN WWDN WD W LDH SBSBRAAaAAAAAS OBRWUOUNNDTCONDTOFH SSaazaa22222222 Fl Cancel F3 More Figure 80 Second Screen of Energy Profile Press F3 More again to display the next Energy Profile Table 26b Energy Profile Fields Field SC Description S O Specifies the hardware point in the system to which the demand meter is connected Instantaneous Demand Specifies the rate of consumption or amount of energy being consumed in the current minute Current Demand Target Specifies the current maximum acceptable value target for peak energy demand The peak is an average in any interval during a scheduled period Rate Engineering Units are specified Average Demand Specifies the average rate of consumption or amount of energy being consumed over the demand interval defined Demand Interval Specifies what the utility company defines as their demand interval in minutes Daily Monthly Information Specifies the total consumption and peak average demand in both daily and monthly formats Total Consumption Specifies the total amount of energy consumed since the p
6. About Energy Management Demand Limiting Load Rolling Energy Management This section tells you how to use Companion s energy management features Demand Limiting Load Rolling and Optimal Start Stop This section includes e About Energy Management e Defining Demand Limiting e Defining Load Rolling e Defining Optimal Start Stop e Displaying an Energy Profile Summary You ll find information on displaying an Energy Profile in the Displaying Summaries section of this manual You ll find technical information about the energy management features in the Metasys Companion Technical Manual under Software Data Sheets You ll find additional information about energy management in the ASHRAE Fundamentals manual and in the Johnson Controls Engineering Data Book This section assumes you know the information in the Getting Started section of this manual By reducing energy costs and consumption Companion s energy management features help you make your facility more cost effective and safe for the environment Demand Limiting reduces energy costs by turning off designated equipment when the amount of energy consumed by the facility approaches a specified target The purpose of Demand Limiting is to keep the demand for energy at any given time below this target This reduces energy costs because utility companies often determine charges by the day s peak demand for energy Load Rolling reduces energy consumption by repea
7. adset option The first undefined Load Rolling loadset number is displayed For example if you have 15 Load Rolling loadsets defined number 16 appears in the Loadset Number field If the maximum number of loadsets 16 has been defined the Loadset Number field appears blank Modifying a Load Rolling Loadset To modify a Load Rolling loadset enter the number of the Load Rolling loadset in the Loadset Number field The Load Rolling loadset appears Adding a Load Rolling Loadset Press Enter A new Load Rolling Loadset Modify Add Delete screen appears The point fields will be blank Deleting a Load Rolling Loadset To delete a Load Rolling loadset enter the number of the Load Rolling loadset in the Load Rolling Loadset Number field The Load Rolling loadset appears Enter Del in the Loadset Enabled field and skip to Step 4 Companion Users Manual 157 Operator Name S Johnson Thu Dec 1 1994 Load Rolling Loadset Loadset Number 1 Loadset Enabled From 07 00 To 17 30 Off Time minutes 15 Release Time minutes 45 Point Point 61 Exhaust Fan 3 63 Exhaust Fan 4 F1 Cancel F2 Save F3 More Figure 77 Load Rolling Loadset Screen 3 Fill in the fields Press Enter to move the cursor from field to field Table 25 explains the fields Deleting a Load Type blank spaces in the point number field of the load you want to delete 4 Either press F2 Save to save the loadset to the Syst
8. anion User s Manual Required Alpha Multiple Numeric Choice 159 Defining To define the Optimal Start Stop OST feature you must have a System Optimal capability password Start Stop Optimal Start Stop OST reduces energy consumption by keeping a facility in unoccupied mode for as long as possible and by putting the facility in unoccupied mode as early as possible without sacrificing comfort You can create one OST system for each air handler The points involved in OST do not need to be controlled by the same controller however all points must be online in order for the process to work You can define up to 30 OST systems Creating an OST Yov ll use the same screen to modify add or delete OST systems System To create an OST system 1 From the Main menu press E to select the Energy Management option The Energy Management menu appears 2 Press O to select the Optimal Start Stop option The first undefined OST number is displayed For example if you have 29 systems defined number 30 appears in the OST Number field If the maximum number of OST processes 30 has been defined the OST Number field appears blank Modifying System To modify an OST enter the number of the OST in the OST Number field The OST appears Adding a System Press Enter A new OST Modify Add Delete screen appears The point fields will be blank Deleting a System To delete an OST enter the number of the OST in the OST Number field T
9. ds You combine the loads in loadsets Demand Limiting compares the current demand to the demand target every minute If the current demand is too close to the demand target Demand Limiting sheds the designated equipment By turning off equipment Demand Limiting prevents the current demand from exceeding the demand target After equipment has been shed for a specified minimum time Demand Limiting returns control of the equipment to the ASCs or to other Companion features This is called releasing the loads If you make any changes to the Demand Limiting settings these will not take effect until the beginning of the next Demand Limiting cycle For example if Demand limiting is currently shedding a loadset and you delete the loadset the loadset will not be deleted until Demand Limiting completes its cycle by releasing the loadset 150 Companion User s Manual Defining the The first part of setting up Demand Limiting is to define an Accumulator point as Demand Meter the demand meter This AC point measures the facility s current demand for energy or some other measurable commodity such as water or gas For example if Demand Limiting will be controlling electrical consumption define the electric company s electric meter as an AC point Then specify that this point will be used for Demand Limiting Only one AC point can be used for Demand Limiting To define a demand meter 1 Determine the Accumulator point that will be used as
10. em data base Or press F3 More to save the loadset and scroll to the next loadset to define or modify PC Version After setting up the Load Rolling loadsets perform a Save Data Base function accessed from the System Setup menu This saves the loadsets to the Disk data base 158 Companion User s Manual Load Rolling Loadset Fields The following table explains the fields you will use to define Load Rolling loadsets Table 25 Load Rolling Loadset Fields Description Options Range Field Type Loadset Identifies a group of loads 1to 16 Number by number Loadset Enabled From To Off Time minutes Release Time minutes Yes available for LR control No removed from LR control Del inappropriate for LR and therefore removed as a LR loadset Specifies the time period that LR will be active for this loadset When active LR cycles the loadset between shed and release states Use this parameter to activate LR according to a schedule Specifies how long the loadset will be shed during each shed release cycle Specifies how long the loadset will be released during each shed release cycle At least 1 and as many as 8 points can be specified for each loadset Each point specifies a particular load Entries must be defined BO software points Yes No and Del 00 00 to 23 59 in 24 hour format 1 to 240 minutes 1 to 240 minutes Any defined BO point Comp
11. eriod started The periods for this display are daily and monthly Peak Average Demand Specifies the highest average demand detected over the period The periods for this display are daily and monthly 164 Companion User s Manual
12. he OST appears Enter Del in the OST Enabled field and skip to Step 4 Operator Name S Johnson 1 1994 Optimal Start Stop Modify Add Delete OST System Number 5 OST Enabled Yes Zone Occupied Mode 31 Flrl OCCUPIED Md 50 Flrl WRM CLDN Md 42 AHU1 Heating Setpoint 78 AHU1 COOLING Setpoint 25 Flrl Zone Temp 22 AHU1 OA Temp Building Heating Cooling Constant 3 Zone Warmup Cooldown Mode Point Heating Set Point Point Cooling Set Point Point Zone Temperature Point Outdoor Air Temperature Point Building Design Temperatures Heating degrees 5 Cooling degrees Maximum Preheat Precool Time minutes 30 Maximum Prestop Time minutes 15 Scheduled Zone Occupied Mode Start Stop 06 30 18 00 Computed Warmup Cooldown Mode Start 06 00 Computed Zone Occupied Zone Stop 17 45 F1 Cancel F2 Save F3 More Figure 78 Optimal Start Stop Modify Add Delete Screen 160 Companion User s Manual OST Definition Fields 3 Fill in the OST fields Press Enter to move the cursor from field to field Table 26 explains all the fields in the OST Modify Add Delete screen 4 Either press F2 Save to save the new OST system to the System data base Or press F3 More to save the system and scroll to the next OST system to add or modify PC Version Remember to save the new system to the Disk data base by performing a Save Data Base function accessed from the System Setup menu The following tab
13. les explain the fields you will use to set up OST systems Table 26a OST Definition Fields OST System Number OST Enabled Zone Occupied Mode Point Zone Warmup Cooldown Mode Point Heating Set Point Point Cooling Set Point Point Description Identifies the zone controlled by this OST process Options Range Multiple Choice Field Type Required Alpha Numeric Shows Yes X X Yes system available for OST control No system removed from OST control Del inappropriate for OST and therefore deleted Identifies the BO point Any Yes N A X used to determine if a defined zone is occupied or BO point vacant This BO point must also be specified on a weekly schedule Identifies the BO point Any Yes N A X used to determine if the defined zone is presently in a BO point warmup cooldown mode of operation Identifies the point used to Any Yes N A X define the heating set defined Al point for the zone or AO Can be the same as the point Cooling Set Point Identifies the point used to Any Yes N A X define the cooling set point defined Al for the zone or AO Can be the same as the point Heating Set Point Continued on next page Companion Users Manual 161 Field Cont Zone Temperature Point Outdoor Air Temperature Point Building Heating Cooling Constant Building Design Temperatures Maximum Preheat Precool Time Maximum Prestop Time Description Identifies the poin
14. re can be up to four Accumulator points defined for each facility Table 26b explains the Energy Profile fields To display an Energy Profile Summary 1 From the Main menu press E to select the Energy Management option The Energy Management menu appears 2 Press E to select the Energy Profile Summary option The first screen of the Energy Profile appears Figure 79 The first screen displays daily information for the current week Operator Name S Johnson 1 1994 14 00 Energy Profile Profile Number 1 Meter 1 AHU O AC B17 Cri 1645 KW Current Information Instantaneous Demand 1645 KW Current Demand Target 1900 KW Average Demand 1516 KW Demand Interval 15 Min Daily Information Total Consumption Peak Average Demand Today 10050 0 KW 1002 1 KW At 12 01 Sun 17380 1224 At 13 16 Mon 33504 1896 At 02 19 Tue 30310 1763 At 04 15 Wed 31490 1812 At 13 14 Thu 31489 LLL At 13 58 Fri 31469 1887 At 14 03 Sat 33290 1473 At 14 13 F1 Cancel Figure 79 First Screen of Energy Profile Companion Users Manual 163 3 Press F3 More to display the second screen of the profile which contains monthly information for the current year Figure 80 Operator Name Johnson 1994 14 00 Energy Profile Profile Number 1 Meter 1 AHU O AC B17 Crl 76 9 KW Monthly Information Total Consumption Peak Average Demand Current Month 101800 4 KW 1002 1 KW At 12 01 On Jan 590300 0 T713 At 13 02 On Feb 66341
15. t Fan 2 Fl Cancel F2 Save F3 More Figure 76 Demand Limiting Loadset Screen 154 Companion User s Manual Fill in the loadset fields Press Enter to move the cursor from field to field Table 24 explains the fields Specify the points you want to include in the loadset Deleting a Load Type blank spaces in the point number field of the load you want to delete Either press F2 Save to save the loadset to the System data base Or press F3 More to save the loadset and scroll to the next loadset to define or modify PC Version After setting up Demand Limiting perform a Save Data Base function accessed from the System Setup menu to save the demand meter demand limiting schedule and loadsets to the Disk data base Companion Users Manual 155 Demand Limiting Loadset Fields The following table explains the fields you will use to set up the Demand Limiting loadsets Table 24 Demand Limiting Loadset Fields Description Options Required Lein Range Field Type Alpha Multiple Numeric Choice Loadset Number Identifies a group of loads by 1to16 number Loadset Enabled Yes available for DL If Current Demand Is gt Of Demand Target THEN Shed This Loadset If Current Demand Is lt Of Demand Target THEN Release This Loadset Minimum Shed Time minutes Maximum Shed Time minutes Minimum Release Time minutes control removed from DL
16. t used to determine the actual zone temperature Identifies the point used to determine the actual outside air temperature Provides an initial value for a constant used in the OST time calculation It is adapted by the system once per day without operator intervention This value is specified as minutes per degrees squared Heating degrees Indicates the lowest outside temperature at which the heating system will maintain zone comfort in the heating mode Values are obtained using ASHRAE manuals Cooling degrees Indicates the highest outside temperature at which the cooling system will maintain zone comfort in the cooling mode Values are obtained using ASHRAE manuals Indicates the maximum period of time required to bring the zone up to occupancy set point temperature under the worst conditions Indicates the earliest the heating cooling system can be shut down and still maintain the occupied zone temperature until entering the vacant mode 162 Companion User s Manual Options Required Range Any defined Al point Any defined Al point 1 to 999 5 to 240 minutes 5 to 60 minutes i Field Type Alpha Multiple Numeric Choice Displaying an Energy Profile Summary The Energy Profile Summary displays detailed information about the energy consumption of your facility The summary can include up to four energy profiles Each profile displays data for one Accumulator point The
17. tedly turning off designated equipment at specified intervals For example instead of running a fan continuously Load Rolling can save energy by turning the fan off for 15 minutes of every hour Companion Users Manual 149 Optimal Start Stop Defining Demand Limiting Optimal Start Stop OST reduces energy consumption by keeping a facility in its unoccupied mode for as long as possible and by putting it in its unoccupied mode as soon as possible without sacrificing comfort To set up the Demand Limiting feature you must have a System capability password Demand Limiting works as follows You define an Accumulator AC point that will be used as a demand meter to measure how much energy the facility is currently consuming Companion calls this consumption value the current demand You specify demand targets for different times of the day This is the amount of energy consumption that you do not want the facility to exceed For example if you specify 1000 kW you do not want more than 1000 kW to be consumed during the demand interval Typically the demand interval is 15 minutes as specified by the utility company You do not want the current demand to exceed the demand target Therefore you specify the equipment that will be turned off if the current demand gets close to the demand target Turning off the equipment is called shedding The points you specify to be shed must be Binary Output points These points are called loa
18. the demand meter This point must be from points 1 through 4 In Companion AC points are restricted to point numbers 1 through 4 2 Define the point for Demand Limiting using the Meter Definition fields in the Point Add screen You can also use the Point Modify screen Table 22 explains the fields Figure 74 shows an example of a Point Add screen for an AC point You ll find complete information on defining points in the Defining Points section of this manual Operator Name S Johnson Thu Dec 1 1994 Point Add Point Number 1 Software Type AC Point Name Electric Meter Network Address N2 address 1 Point Type AC Point Address 7 Accumulator Point Definition Consumption Engineering Units KWH Consumption Constant 1 000 Rate Engineering Units KW Rate Constant 3600 Low Limit 0 0 High Limit 2000 0 Decimal Position 1 Alarm Reporting Definition Priority Critical Alarm Message Used When Reporting 1 Dial Sequence Number 1 Meter Definition Used For Demand Limiting Yes Demand Interval 15 Fl Cancel F2 Save Figure 74 Meter Definition Fields in Accumulator Point Add Screen 3 Press F2 Save to save the AC point to the System data base You are now ready to set up the Demand Limiting Schedule Companion Users Manual 151 Demand Meter The following table explains the fields you will use to define the demand meter Definition Fields Table 22 Demand Meter Definition Fields
19. ts These are groups of Binary Output points corresponding to the equipment Load Rolling will turn off You specify the amount of time the equipment will be turned off the amount of time the equipment will be released and the time of day that Load rolling will be active e Ifthe loadset is enabled Load Rolling turns the equipment off for the time you specified After the time elapses Load Rolling releases the equipment for the release time you specified After the release time elapses if the loadset is still enabled Load Rolling starts the off release cycle again Youll find technical information about Load Rolling in the Metasys Companion Technical Manual under Software Data Sheets A loadset is a group of loads Loads are Binary Output points corresponding to the equipment that Load Rolling will turn off according to the time you specify For example you can specify that all loads in the loadset be turned off for ten minutes of every half hour Typically the equipment specified as a load can be turned off without sacrificing safety or comfort For example an exhaust fan is a good candidate for a load You can define up to 16 loadsets and each loadset can have up to 8 BO points Youll use the same screen to add modify or delete Load Rolling loadsets To set up Load Rolling loadsets 1 From the Main menu press E to select the Energy Management option The Energy Management menu appears 2 Press L to select the Load Rolling lo
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