Operator Workstation User`s Manual: Using Demand Limit/Load
Contents
1. define these loads as BO BD Multistate Object MSO or Multistate Data MSD objects us Window Use the Load Group Focus window to display detailed information about the operation of the Load Group object modify object attributes and access the Associated Loads dialog box Use the Associated Loads dialog box to add delete or modify loads Figure 16 1 shows an example of a Load Group Focus window S41 Load Group Focus OX ltem Edit View Action GoTo Accessory Help System Name Object Name Expanded ID OBJ 142 DLLR_CTR Control Object for DLLR Johnson Controls Hdgtrs GENERAL NT Obj Grp NC99 GROUP 2 DLLR Software Objects ASSOC LOAI 0BJ_142 DLLR_CTR Report Lock Disabled Status EOI Status gt Yi Figure 16 1 Load Group Focus Window Operator Workstation User s Manual 16 3 The modifiable fields such as Expanded ID in the Load Group Focus window are contained in boxes To access online help on the fields in the Load Group Focus window use the Attribute Help option on the Help menu Utility Profile The Utility Profile screen displays detailed information about the energy consumption of Load Group objects Information in the utility profile can not be changed Figure 16 2 shows an example of a utility profile Utility Profile ltem Edit View Acton GoTo Accessory Help Utility Profile Item Description Status OBJ_142 DLLR_CTR Control Object fo2. 6 5 Load Rolling Shedding Enables the shedding of loads by Load Rolling This command complements the Load Rolling Monitor Only command Reset Period Moves Load Group information from the current period to the previous period and clears the current period information Lock Load Locks one specified load When a load is locked the Demand Limiting Load Rolling feature does not consider it a candidate for shedding Unlock Load Unlocks a load that has been locked with the Lock Load command When a load is unlocked Demand Limiting Load Rolling considers it a shed candidate Set Demand Limiting Tariff 1 Target Specifies a new Demand Limiting target Set Demand Limiting Tariff 2 Target Specifies a new Demand Limiting target Set Demand Limiting Tariff 3 Target Specifies a new Demand Limiting target Set Demand Limiting Tariff 4 Target Specifies a new Demand Limiting target Set Load Rolling Tariff 1 Target Specifies a new Load Rolling target Set Load Rolling Tariff 2 Target Specifies a new Load Rolling target Set Load Rolling Tariff 3 Target Specifies a new Load Rolling target Set Load Rolling Tariff 4 Target Specifies a new Load Rolling target 16 6 Operator Workstation User s Manual Online Help Communication Commands The Lock Unlock Triggers and Lock Unlock Reports commands operate for the Load Group object as they do for other objects The Enable and Disable commands differ for the Lo
3. Operator Workstation User s Manual 16 1 Chapter 16 Using Demand Limit Load Rolling Introduction Demand Limiting Load Rolling combines two related features both of which lower facility energy costs Demand Limiting lowers the peak demand of energy usage by temporarily turning off designated equipment before the usage reaches the defined target limit Load Rolling lowers energy usage by constantly turning off enough equipment to meet the target for Load Rolling the target is the amount of energy to be off at any given time This chapter describes how to e display the Load Group Focus window e define a load group object e define a load e modify a load e delete a load e display the Utility Profile November 1 2001 Johnson Controls Inc www johnsoncontrols com Code No LIT 120158 16 2 Operator Workstation User s Manual Key Concepts Demand Limiting Load Rolling Setup Load Group Foc There are two tasks to perform when setting up the Demand Limiting Load Rolling feature The first task is defining the Load Group object for Demand Limiting Load Rolling or both For this process specify the values that the system will use to determine when loads are turned off for example the limit that energy consumption is not to exceed Turning off loads is also called shedding loads The second task in the process of setting up DL LR is to define the loads that make up the Load Group Use the Load Definition window to
4. ad Definition Window 6 Enter the required information in the Load Definition window fields 7 After defining the load click Save on the Item menu The new load is added to the operational database The Load Definition window remains active 8 Repeat Steps 6 through 8 until all the loads are defined for the Load Group To save the changes to the archive database perform an NCM upload described in the Uploading and Downloading Databases chapter LIT 120155 16 12 Operator Workstation User s Manual Shortcut To add a load that is similar to one already defined l Modifying a Load Select a load that is similar to the new load in the Associated Loads dialog box Click Add The Load Definition window appears Figure 16 6 displaying the settings of the selected load Specify the system object name of the new load change the other settings as needed and save the load To modify a load 1 Display the Load Group Focus window by double clicking the Load Group object in any summary displaying the object 2 Click the Associated Loads option button in the upper right corner of the window The Associated Loads dialog box appears Figure 16 5 3 Select the priority level The list box displays all loads at the selected priority level If necessary use the scroll bar to scroll through the list of loads 4 Double click the load The Load Focus window for the selected load appears Figure 16 7 Operator Work
5. ad Group object as follows e Enable Enables the DL LR feature This command complements the Disable command DL LR begins monitoring and calculating data e Disable Disables the DL LR feature When the feature is disabled it does not monitor data or make DL LR calculations Therefore when the feature is enabled after a Disable command it must start its calculations from the beginning Scheduling Demand Limit Load Rolling Commands For more information on scheduling Demand Limit Load Rolling commands refer to the Scheduling Commands and Summaries chapter LIT 120173 Use the online help provided for all Definition and Focus windows to explain any unfamiliar fields during the definition process Online help describes the fields and gives the formats and valid ranges to use when entering values To access online help use the Attribute Help option on the Help menu For a complete description of online help refer to the Using Online Help chapter LIT 120175 Operator Workstation User s Manual 16 7 Detailed Procedures Displaying the Load Group Focus Window To display the Load Group Focus window 1 Double click the system that contains the Load Group Object The System summary appears 2 Double click the Load Group object The Load Group Focus window appears Figure 16 3 Defining a Load Group Object To define a Load Group object 1 Double click the system that will contain the new object The System summar
6. eak Total Consumption displays the date time and the amount of energy that the object consumed during the previous period in terms of e Measured Peak The largest demand interval peak detected during the last period including the time and date of the peak e Projected Peak The largest projected demand interval peak for the last period including the time and date of the projected peak Commanding the Load Group Object Command the Load Group object from any summary displaying the object or from the Load Group Focus window Use the Operation and Communication command options on the Action menu For the procedures for commanding objects refer to the Commanding Objects Cc a hapter LIT 120172 The Operation and Communications commands vailable with DL LR are described below Operation Commands Demand Limiting Monitor Only Disables the shedding of loads by the Demand Limiting feature Demand Limiting continues to monitor energy consumption and make calculations Because of this the object is ready to shed loads when enabled again This command complements the Demand Limiting Shedding command Demand Limiting Shedding Enables the shedding of loads by the Demand Limiting feature This command complements the Demand Limiting Monitor Only command Load Rolling Monitor Only Disables the shedding of loads by Load Rolling This command complements the Load Rolling Shedding command Operator Workstation User s Manual 1
7. he Uploading and Downloading Databases chapter LIT 120155 16 10 Operator Workstation User s Manual Defining a Load To define loads 1 Double click the system that contains the most recently defined Load Group object The system summary appears 2 Double click the Load Group object The Load Group Focus window appears Figure 16 1 3 Double click the Associated Loads button in the upper right corner of the Load Group Focus window The Associated Loads dialog box appears Figure 16 5 This box lists the loads in the Load Group Associated Loads for Load Group OBJ_142 DLLR_CTR sysfobj OBJ 099 Load07 OBJ_099 Load11 OBJ_142 Load15 Priority Level DISPLAY MODIFY _ a O1 C3 c2 Ca DELETE al Figure 16 5 Associated Loads Dialog Box 4 Select the priority level by clicking one of the priority level option buttons 1 4 Note Shed candidates for Load Rolling must be priority Level 3 Shed candidates for Demand Limiting can be any priority level Operator Workstation User s Manual 16 11 5 Click the Add option button The Load Definition window appears Figure 16 6 Load BO Definition ltem Edit View Acton GoTo Accessory Help ASSOCIATED LC System Name Object Name Load Group Comfort Override System Name OBJ_142 System Name Object Name DLLR_CTR Object Name Minimum Shed time Priority Load Locked Minimum Release time 6 minutes z EE ay Figure 16 6 Lo
8. r DLLR Alarm Value Date Time Current Period since 05 29 01 15 00 34 Tariff 1 Total Consumption 0 KWH Measured Peak Oo KW at 05 29 01 15 00 34 Projected Peak 0 KW at 05 29 01 15 00 34 Tariff 2 Total Consumption 0 KWH Measured Peak 0 KW at 05 29 01 15 00 34 Projected Peak 0 KW at 05 29 01 15 00 34 Tariff 3 Total Consumption 0 KWH Measured Peak 0 KW at 05 29 01 15 00 34 Projected Peak 0 KW at 05 29 01 15 00 34 Figure 16 2 Utility Profile 16 4 Operator Workstation User s Manual Table 16 1 details the information that the Utility Profile fields display Table 16 1 Utility Profile Fields Field Item Description Status Current Period Previous Period Description Name of the load group Extended ID of the load group Load Group s current status Normal or Alarm Total Consumption in Measured Peak and Projected Peak for four different tariff levels Total Consumption displays the date time and the amount of energy that the object has consumed during the current period for four tariff levels in terms of e Measured Peak The largest demand interval peak detected since the start of the period including the time and date of the peak e Projected Peak The largest projected demand interval peak for the period including the time and date of the projected peak Use tariff levels to set the demand target at four different levels Only one level is active at a time Total Consumption in Measured Peak and Projected P
9. station User s Manual 16 13 s4 Load BO Focus OF Xx ltem Edit View Action GoTo Accessory Help 5 ASSOCIA System Name OBJ_142 Object Name Load15 Expanded ID DLLR System Load UNT_5 Load Group Comfort Overr System Name OBJ_142 System Name Ohject Name DLLR CTR Ohiert Name Z a aD Figure 16 7 Load Focus Window 5 Modify the settings 6 On the Item menu click Save The changes are saved and added to the operational NCM database To save the changes to the archived database perform an NCM upload described in the Uploading and Downloading Databases chapter LIT 120155 Deleting a Load To delete a load 1 Display the Load Group Focus window by double clicking the Load Group object in any summary displaying the object 2 Click the Associated Loads option button in the upper right corner of the window The Associated Loads dialog box appears Figure 16 5 3 Select the priority level The list box displays all loads at the selected priority level 4 Click the load Click the Delete option button The Delete dialog box appears asking for confirmation 16 14 Operator Workstation User s Manual 6 Click OK The selected load is deleted from the Load Group To save the changes to the archived database perform an NCM upload described in the Uploading and Downloading Databases chapter LIT 120155 Displaying the Utility Profile To display the Utility Profile 1 Click the PC group or s
10. y appears 2 On the Item menu click New The following Item New dialog box appears Figure 16 3 16 8 Operator Workstation User s Manual AHUX Item New fecumuiator C Control system cance Analog data C DLJLR group Analog input C LC group C Analog output digital C PID loop C Analog output setpoint C Fire Zone C Binary data C L2 devices C Binary input C N2 devices C Binary output C N2E devices C MS data C 2 devices C MS input C Card Reader C MS output C LON devices C Multiple Command Hardware system name e Hardware object name e copy ot systemonjecse d Figure 16 3 Item New Dialog Box for Objects 3 Click the DL LR Group option button 4 Click OK The Load Group Definition window appears Figure 16 4 Operator Workstation User s Manual El Load Group Definition ltem Edit View Acton GoTo Accessory Help JTCHDQTRS Johnson Controls Hdgtrs GRP NC67 LIGHTING Object Grp NC6 Third Floor System System Name AHUX Object Name Expanded ID Graphic Symbol e Disabled Operating Instr e mimi Figure 16 4 Load Group Definition Window 5 Enter the required information in the Load Group Definition fields 6 After defining the Load Group object click Save on the Item 16 9 menu The new Load Group object is added to the operational NCM database To save the changes to the archive database perform an NCM upload which is described in t
11. ystem with the relevant Load Group object or objects in the Utility Profile 2 Click the Summary option in the Network Map menu bar The Summary dialog box appears Figure 16 8 NETWORK MAP Summary SUMMARY NAME DISPLAY LIST SELECTED ITEMS UTILITY PROFILE Figure 16 8 Network Map Summary Dialog Box 3 Use the scroll bar in the Summary dialog box to display the Utility Profile option 4 Double click the Utility Profile option The Utility Profile appears Figure 16 2 Operator Workstation User s Manual 16 15 Troubleshooting Correcting Invalid Entries If a field contains invalid information it appears red when cursor moves to a new field If this happens select and correct the information If you attempt to save the window with invalid information a message appears indicating the error Acknowledge the message by clicking OK correct the information and attempt the save again An entry might be invalid because it is not in the correct format or because it exceeds the valid range
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